1 /* Compiler driver program that can handle many languages. 2 Copyright (C) 1987-2013 Free Software Foundation, Inc. 3 4 This file is part of GCC. 5 6 GCC is free software; you can redistribute it and/or modify it under 7 the terms of the GNU General Public License as published by the Free 8 Software Foundation; either version 3, or (at your option) any later 9 version. 10 11 GCC is distributed in the hope that it will be useful, but WITHOUT ANY 12 WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 for more details. 15 16 You should have received a copy of the GNU General Public License 17 along with GCC; see the file COPYING3. If not see 18 <http://www.gnu.org/licenses/>. */ 19 20 /* This program is the user interface to the C compiler and possibly to 21 other compilers. It is used because compilation is a complicated procedure 22 which involves running several programs and passing temporary files between 23 them, forwarding the users switches to those programs selectively, 24 and deleting the temporary files at the end. 25 26 CC recognizes how to compile each input file by suffixes in the file names. 27 Once it knows which kind of compilation to perform, the procedure for 28 compilation is specified by a string called a "spec". */ 29 30 #include "config.h" 31 #include "system.h" 32 #include "coretypes.h" 33 #include "multilib.h" /* before tm.h */ 34 #include "tm.h" 35 #include "xregex.h" 36 #include "obstack.h" 37 #include "intl.h" 38 #include "prefix.h" 39 #include "gcc.h" 40 #include "diagnostic.h" 41 #include "flags.h" 42 #include "opts.h" 43 #include "params.h" 44 #include "vec.h" 45 #include "filenames.h" 46 47 /* By default there is no special suffix for target executables. */ 48 /* FIXME: when autoconf is fixed, remove the host check - dj */ 49 #if defined(TARGET_EXECUTABLE_SUFFIX) && defined(HOST_EXECUTABLE_SUFFIX) 50 #define HAVE_TARGET_EXECUTABLE_SUFFIX 51 #endif 52 53 /* By default there is no special suffix for host executables. */ 54 #ifdef HOST_EXECUTABLE_SUFFIX 55 #define HAVE_HOST_EXECUTABLE_SUFFIX 56 #else 57 #define HOST_EXECUTABLE_SUFFIX "" 58 #endif 59 60 /* By default, the suffix for target object files is ".o". */ 61 #ifdef TARGET_OBJECT_SUFFIX 62 #define HAVE_TARGET_OBJECT_SUFFIX 63 #else 64 #define TARGET_OBJECT_SUFFIX ".o" 65 #endif 66 67 static const char dir_separator_str[] = { DIR_SEPARATOR, 0 }; 68 69 /* Most every one is fine with LIBRARY_PATH. For some, it conflicts. */ 70 #ifndef LIBRARY_PATH_ENV 71 #define LIBRARY_PATH_ENV "LIBRARY_PATH" 72 #endif 73 74 /* If a stage of compilation returns an exit status >= 1, 75 compilation of that file ceases. */ 76 77 #define MIN_FATAL_STATUS 1 78 79 /* Flag set by cppspec.c to 1. */ 80 int is_cpp_driver; 81 82 /* Flag set to nonzero if an @file argument has been supplied to gcc. */ 83 static bool at_file_supplied; 84 85 /* Definition of string containing the arguments given to configure. */ 86 #include "configargs.h" 87 88 /* Flag saying to print the command line options understood by gcc and its 89 sub-processes. */ 90 91 static int print_help_list; 92 93 /* Flag saying to print the version of gcc and its sub-processes. */ 94 95 static int print_version; 96 97 /* Flag indicating whether we should ONLY print the command and 98 arguments (like verbose_flag) without executing the command. 99 Displayed arguments are quoted so that the generated command 100 line is suitable for execution. This is intended for use in 101 shell scripts to capture the driver-generated command line. */ 102 static int verbose_only_flag; 103 104 /* Flag indicating how to print command line options of sub-processes. */ 105 106 static int print_subprocess_help; 107 108 /* Whether we should report subprocess execution times to a file. */ 109 110 FILE *report_times_to_file = NULL; 111 112 /* Nonzero means place this string before uses of /, so that include 113 and library files can be found in an alternate location. */ 114 115 #ifdef TARGET_SYSTEM_ROOT 116 static const char *target_system_root = TARGET_SYSTEM_ROOT; 117 #else 118 static const char *target_system_root = 0; 119 #endif 120 121 /* Nonzero means pass the updated target_system_root to the compiler. */ 122 123 static int target_system_root_changed; 124 125 /* Nonzero means append this string to target_system_root. */ 126 127 static const char *target_sysroot_suffix = 0; 128 129 /* Nonzero means append this string to target_system_root for headers. */ 130 131 static const char *target_sysroot_hdrs_suffix = 0; 132 133 /* Nonzero means write "temp" files in source directory 134 and use the source file's name in them, and don't delete them. */ 135 136 static enum save_temps { 137 SAVE_TEMPS_NONE, /* no -save-temps */ 138 SAVE_TEMPS_CWD, /* -save-temps in current directory */ 139 SAVE_TEMPS_OBJ /* -save-temps in object directory */ 140 } save_temps_flag; 141 142 /* Output file to use to get the object directory for -save-temps=obj */ 143 static char *save_temps_prefix = 0; 144 static size_t save_temps_length = 0; 145 146 /* The compiler version. */ 147 148 static const char *compiler_version; 149 150 /* The target version. */ 151 152 static const char *const spec_version = DEFAULT_TARGET_VERSION; 153 154 /* The target machine. */ 155 156 static const char *spec_machine = DEFAULT_TARGET_MACHINE; 157 158 /* Nonzero if cross-compiling. 159 When -b is used, the value comes from the `specs' file. */ 160 161 #ifdef CROSS_DIRECTORY_STRUCTURE 162 static const char *cross_compile = "1"; 163 #else 164 static const char *cross_compile = "0"; 165 #endif 166 167 /* Greatest exit code of sub-processes that has been encountered up to 168 now. */ 169 static int greatest_status = 1; 170 171 /* This is the obstack which we use to allocate many strings. */ 172 173 static struct obstack obstack; 174 175 /* This is the obstack to build an environment variable to pass to 176 collect2 that describes all of the relevant switches of what to 177 pass the compiler in building the list of pointers to constructors 178 and destructors. */ 179 180 static struct obstack collect_obstack; 181 182 /* Forward declaration for prototypes. */ 183 struct path_prefix; 184 struct prefix_list; 185 186 static void init_spec (void); 187 static void store_arg (const char *, int, int); 188 static void insert_wrapper (const char *); 189 static char *load_specs (const char *); 190 static void read_specs (const char *, bool, bool); 191 static void set_spec (const char *, const char *, bool); 192 static struct compiler *lookup_compiler (const char *, size_t, const char *); 193 static char *build_search_list (const struct path_prefix *, const char *, 194 bool, bool); 195 static void xputenv (const char *); 196 static void putenv_from_prefixes (const struct path_prefix *, const char *, 197 bool); 198 static int access_check (const char *, int); 199 static char *find_a_file (const struct path_prefix *, const char *, int, bool); 200 static void add_prefix (struct path_prefix *, const char *, const char *, 201 int, int, int); 202 static void add_sysrooted_prefix (struct path_prefix *, const char *, 203 const char *, int, int, int); 204 static char *skip_whitespace (char *); 205 static void delete_if_ordinary (const char *); 206 static void delete_temp_files (void); 207 static void delete_failure_queue (void); 208 static void clear_failure_queue (void); 209 static int check_live_switch (int, int); 210 static const char *handle_braces (const char *); 211 static inline bool input_suffix_matches (const char *, const char *); 212 static inline bool switch_matches (const char *, const char *, int); 213 static inline void mark_matching_switches (const char *, const char *, int); 214 static inline void process_marked_switches (void); 215 static const char *process_brace_body (const char *, const char *, const char *, int, int); 216 static const struct spec_function *lookup_spec_function (const char *); 217 static const char *eval_spec_function (const char *, const char *); 218 static const char *handle_spec_function (const char *); 219 static char *save_string (const char *, int); 220 static void set_collect_gcc_options (void); 221 static int do_spec_1 (const char *, int, const char *); 222 static int do_spec_2 (const char *); 223 static void do_option_spec (const char *, const char *); 224 static void do_self_spec (const char *); 225 static const char *find_file (const char *); 226 static int is_directory (const char *, bool); 227 static const char *validate_switches (const char *, bool); 228 static void validate_all_switches (void); 229 static inline void validate_switches_from_spec (const char *, bool); 230 static void give_switch (int, int); 231 static int used_arg (const char *, int); 232 static int default_arg (const char *, int); 233 static void set_multilib_dir (void); 234 static void print_multilib_info (void); 235 static void perror_with_name (const char *); 236 static void display_help (void); 237 static void add_preprocessor_option (const char *, int); 238 static void add_assembler_option (const char *, int); 239 static void add_linker_option (const char *, int); 240 static void process_command (unsigned int, struct cl_decoded_option *); 241 static int execute (void); 242 static void alloc_args (void); 243 static void clear_args (void); 244 static void fatal_signal (int); 245 #if defined(ENABLE_SHARED_LIBGCC) && !defined(REAL_LIBGCC_SPEC) 246 static void init_gcc_specs (struct obstack *, const char *, const char *, 247 const char *); 248 #endif 249 #if defined(HAVE_TARGET_OBJECT_SUFFIX) || defined(HAVE_TARGET_EXECUTABLE_SUFFIX) 250 static const char *convert_filename (const char *, int, int); 251 #endif 252 253 static const char *getenv_spec_function (int, const char **); 254 static const char *if_exists_spec_function (int, const char **); 255 static const char *if_exists_else_spec_function (int, const char **); 256 static const char *replace_outfile_spec_function (int, const char **); 257 static const char *remove_outfile_spec_function (int, const char **); 258 static const char *version_compare_spec_function (int, const char **); 259 static const char *include_spec_function (int, const char **); 260 static const char *find_file_spec_function (int, const char **); 261 static const char *find_plugindir_spec_function (int, const char **); 262 static const char *print_asm_header_spec_function (int, const char **); 263 static const char *compare_debug_dump_opt_spec_function (int, const char **); 264 static const char *compare_debug_self_opt_spec_function (int, const char **); 265 static const char *compare_debug_auxbase_opt_spec_function (int, const char **); 266 static const char *pass_through_libs_spec_func (int, const char **); 267 static const char *replace_extension_spec_func (int, const char **); 268 static char *convert_white_space (char *); 269 270 /* The Specs Language 271 272 Specs are strings containing lines, each of which (if not blank) 273 is made up of a program name, and arguments separated by spaces. 274 The program name must be exact and start from root, since no path 275 is searched and it is unreliable to depend on the current working directory. 276 Redirection of input or output is not supported; the subprograms must 277 accept filenames saying what files to read and write. 278 279 In addition, the specs can contain %-sequences to substitute variable text 280 or for conditional text. Here is a table of all defined %-sequences. 281 Note that spaces are not generated automatically around the results of 282 expanding these sequences; therefore, you can concatenate them together 283 or with constant text in a single argument. 284 285 %% substitute one % into the program name or argument. 286 %i substitute the name of the input file being processed. 287 %b substitute the basename of the input file being processed. 288 This is the substring up to (and not including) the last period 289 and not including the directory unless -save-temps was specified 290 to put temporaries in a different location. 291 %B same as %b, but include the file suffix (text after the last period). 292 %gSUFFIX 293 substitute a file name that has suffix SUFFIX and is chosen 294 once per compilation, and mark the argument a la %d. To reduce 295 exposure to denial-of-service attacks, the file name is now 296 chosen in a way that is hard to predict even when previously 297 chosen file names are known. For example, `%g.s ... %g.o ... %g.s' 298 might turn into `ccUVUUAU.s ccXYAXZ12.o ccUVUUAU.s'. SUFFIX matches 299 the regexp "[.0-9A-Za-z]*%O"; "%O" is treated exactly as if it 300 had been pre-processed. Previously, %g was simply substituted 301 with a file name chosen once per compilation, without regard 302 to any appended suffix (which was therefore treated just like 303 ordinary text), making such attacks more likely to succeed. 304 %|SUFFIX 305 like %g, but if -pipe is in effect, expands simply to "-". 306 %mSUFFIX 307 like %g, but if -pipe is in effect, expands to nothing. (We have both 308 %| and %m to accommodate differences between system assemblers; see 309 the AS_NEEDS_DASH_FOR_PIPED_INPUT target macro.) 310 %uSUFFIX 311 like %g, but generates a new temporary file name even if %uSUFFIX 312 was already seen. 313 %USUFFIX 314 substitutes the last file name generated with %uSUFFIX, generating a 315 new one if there is no such last file name. In the absence of any 316 %uSUFFIX, this is just like %gSUFFIX, except they don't share 317 the same suffix "space", so `%g.s ... %U.s ... %g.s ... %U.s' 318 would involve the generation of two distinct file names, one 319 for each `%g.s' and another for each `%U.s'. Previously, %U was 320 simply substituted with a file name chosen for the previous %u, 321 without regard to any appended suffix. 322 %jSUFFIX 323 substitutes the name of the HOST_BIT_BUCKET, if any, and if it is 324 writable, and if save-temps is off; otherwise, substitute the name 325 of a temporary file, just like %u. This temporary file is not 326 meant for communication between processes, but rather as a junk 327 disposal mechanism. 328 %.SUFFIX 329 substitutes .SUFFIX for the suffixes of a matched switch's args when 330 it is subsequently output with %*. SUFFIX is terminated by the next 331 space or %. 332 %d marks the argument containing or following the %d as a 333 temporary file name, so that that file will be deleted if GCC exits 334 successfully. Unlike %g, this contributes no text to the argument. 335 %w marks the argument containing or following the %w as the 336 "output file" of this compilation. This puts the argument 337 into the sequence of arguments that %o will substitute later. 338 %V indicates that this compilation produces no "output file". 339 %W{...} 340 like %{...} but mark last argument supplied within 341 as a file to be deleted on failure. 342 %o substitutes the names of all the output files, with spaces 343 automatically placed around them. You should write spaces 344 around the %o as well or the results are undefined. 345 %o is for use in the specs for running the linker. 346 Input files whose names have no recognized suffix are not compiled 347 at all, but they are included among the output files, so they will 348 be linked. 349 %O substitutes the suffix for object files. Note that this is 350 handled specially when it immediately follows %g, %u, or %U 351 (with or without a suffix argument) because of the need for 352 those to form complete file names. The handling is such that 353 %O is treated exactly as if it had already been substituted, 354 except that %g, %u, and %U do not currently support additional 355 SUFFIX characters following %O as they would following, for 356 example, `.o'. 357 %I Substitute any of -iprefix (made from GCC_EXEC_PREFIX), -isysroot 358 (made from TARGET_SYSTEM_ROOT), -isystem (made from COMPILER_PATH 359 and -B options) and -imultilib as necessary. 360 %s current argument is the name of a library or startup file of some sort. 361 Search for that file in a standard list of directories 362 and substitute the full name found. 363 %eSTR Print STR as an error message. STR is terminated by a newline. 364 Use this when inconsistent options are detected. 365 %nSTR Print STR as a notice. STR is terminated by a newline. 366 %x{OPTION} Accumulate an option for %X. 367 %X Output the accumulated linker options specified by compilations. 368 %Y Output the accumulated assembler options specified by compilations. 369 %Z Output the accumulated preprocessor options specified by compilations. 370 %a process ASM_SPEC as a spec. 371 This allows config.h to specify part of the spec for running as. 372 %A process ASM_FINAL_SPEC as a spec. A capital A is actually 373 used here. This can be used to run a post-processor after the 374 assembler has done its job. 375 %D Dump out a -L option for each directory in startfile_prefixes. 376 If multilib_dir is set, extra entries are generated with it affixed. 377 %l process LINK_SPEC as a spec. 378 %L process LIB_SPEC as a spec. 379 %M Output multilib_os_dir. 380 %G process LIBGCC_SPEC as a spec. 381 %R Output the concatenation of target_system_root and 382 target_sysroot_suffix. 383 %S process STARTFILE_SPEC as a spec. A capital S is actually used here. 384 %E process ENDFILE_SPEC as a spec. A capital E is actually used here. 385 %C process CPP_SPEC as a spec. 386 %1 process CC1_SPEC as a spec. 387 %2 process CC1PLUS_SPEC as a spec. 388 %* substitute the variable part of a matched option. (See below.) 389 Note that each comma in the substituted string is replaced by 390 a single space. 391 %<S remove all occurrences of -S from the command line. 392 Note - this command is position dependent. % commands in the 393 spec string before this one will see -S, % commands in the 394 spec string after this one will not. 395 %>S Similar to "%<S", but keep it in the GCC command line. 396 %<S* remove all occurrences of all switches beginning with -S from the 397 command line. 398 %:function(args) 399 Call the named function FUNCTION, passing it ARGS. ARGS is 400 first processed as a nested spec string, then split into an 401 argument vector in the usual fashion. The function returns 402 a string which is processed as if it had appeared literally 403 as part of the current spec. 404 %{S} substitutes the -S switch, if that switch was given to GCC. 405 If that switch was not specified, this substitutes nothing. 406 Here S is a metasyntactic variable. 407 %{S*} substitutes all the switches specified to GCC whose names start 408 with -S. This is used for -o, -I, etc; switches that take 409 arguments. GCC considers `-o foo' as being one switch whose 410 name starts with `o'. %{o*} would substitute this text, 411 including the space; thus, two arguments would be generated. 412 %{S*&T*} likewise, but preserve order of S and T options (the order 413 of S and T in the spec is not significant). Can be any number 414 of ampersand-separated variables; for each the wild card is 415 optional. Useful for CPP as %{D*&U*&A*}. 416 417 %{S:X} substitutes X, if the -S switch was given to GCC. 418 %{!S:X} substitutes X, if the -S switch was NOT given to GCC. 419 %{S*:X} substitutes X if one or more switches whose names start 420 with -S was given to GCC. Normally X is substituted only 421 once, no matter how many such switches appeared. However, 422 if %* appears somewhere in X, then X will be substituted 423 once for each matching switch, with the %* replaced by the 424 part of that switch that matched the '*'. 425 %{.S:X} substitutes X, if processing a file with suffix S. 426 %{!.S:X} substitutes X, if NOT processing a file with suffix S. 427 %{,S:X} substitutes X, if processing a file which will use spec S. 428 %{!,S:X} substitutes X, if NOT processing a file which will use spec S. 429 430 %{S|T:X} substitutes X if either -S or -T was given to GCC. This may be 431 combined with '!', '.', ',', and '*' as above binding stronger 432 than the OR. 433 If %* appears in X, all of the alternatives must be starred, and 434 only the first matching alternative is substituted. 435 %{S:X; if S was given to GCC, substitutes X; 436 T:Y; else if T was given to GCC, substitutes Y; 437 :D} else substitutes D. There can be as many clauses as you need. 438 This may be combined with '.', '!', ',', '|', and '*' as above. 439 440 %(Spec) processes a specification defined in a specs file as *Spec: 441 442 The conditional text X in a %{S:X} or similar construct may contain 443 other nested % constructs or spaces, or even newlines. They are 444 processed as usual, as described above. Trailing white space in X is 445 ignored. White space may also appear anywhere on the left side of the 446 colon in these constructs, except between . or * and the corresponding 447 word. 448 449 The -O, -f, -g, -m, and -W switches are handled specifically in these 450 constructs. If another value of -O or the negated form of a -f, -m, or 451 -W switch is found later in the command line, the earlier switch 452 value is ignored, except with {S*} where S is just one letter; this 453 passes all matching options. 454 455 The character | at the beginning of the predicate text is used to indicate 456 that a command should be piped to the following command, but only if -pipe 457 is specified. 458 459 Note that it is built into GCC which switches take arguments and which 460 do not. You might think it would be useful to generalize this to 461 allow each compiler's spec to say which switches take arguments. But 462 this cannot be done in a consistent fashion. GCC cannot even decide 463 which input files have been specified without knowing which switches 464 take arguments, and it must know which input files to compile in order 465 to tell which compilers to run. 466 467 GCC also knows implicitly that arguments starting in `-l' are to be 468 treated as compiler output files, and passed to the linker in their 469 proper position among the other output files. */ 470 471 /* Define the macros used for specs %a, %l, %L, %S, %C, %1. */ 472 473 /* config.h can define ASM_SPEC to provide extra args to the assembler 474 or extra switch-translations. */ 475 #ifndef ASM_SPEC 476 #define ASM_SPEC "" 477 #endif 478 479 /* config.h can define ASM_FINAL_SPEC to run a post processor after 480 the assembler has run. */ 481 #ifndef ASM_FINAL_SPEC 482 #define ASM_FINAL_SPEC \ 483 "%{gsplit-dwarf: \n\ 484 objcopy --extract-dwo \ 485 %{c:%{o*:%*}%{!o*:%b%O}}%{!c:%U%O} \ 486 %{c:%{o*:%:replace-extension(%{o*:%*} .dwo)}%{!o*:%b.dwo}}%{!c:%b.dwo} \n\ 487 objcopy --strip-dwo \ 488 %{c:%{o*:%*}%{!o*:%b%O}}%{!c:%U%O} \ 489 }" 490 #endif 491 492 /* config.h can define CPP_SPEC to provide extra args to the C preprocessor 493 or extra switch-translations. */ 494 #ifndef CPP_SPEC 495 #define CPP_SPEC "" 496 #endif 497 498 /* config.h can define CC1_SPEC to provide extra args to cc1 and cc1plus 499 or extra switch-translations. */ 500 #ifndef CC1_SPEC 501 #define CC1_SPEC "" 502 #endif 503 504 /* config.h can define CC1PLUS_SPEC to provide extra args to cc1plus 505 or extra switch-translations. */ 506 #ifndef CC1PLUS_SPEC 507 #define CC1PLUS_SPEC "" 508 #endif 509 510 /* config.h can define LINK_SPEC to provide extra args to the linker 511 or extra switch-translations. */ 512 #ifndef LINK_SPEC 513 #define LINK_SPEC "" 514 #endif 515 516 /* config.h can define LIB_SPEC to override the default libraries. */ 517 #ifndef LIB_SPEC 518 #define LIB_SPEC "%{!shared:%{g*:-lg} %{!p:%{!pg:-lc}}%{p:-lc_p}%{pg:-lc_p}}" 519 #endif 520 521 /* mudflap specs */ 522 #ifndef MFWRAP_SPEC 523 /* XXX: valid only for GNU ld */ 524 /* XXX: should exactly match hooks provided by libmudflap.a */ 525 #define MFWRAP_SPEC " %{static: %{fmudflap|fmudflapth: \ 526 --wrap=malloc --wrap=free --wrap=calloc --wrap=realloc\ 527 --wrap=mmap --wrap=mmap64 --wrap=munmap --wrap=alloca\ 528 } %{fmudflapth: --wrap=pthread_create\ 529 }} %{fmudflap|fmudflapth: --wrap=main}" 530 #endif 531 #ifndef MFLIB_SPEC 532 #define MFLIB_SPEC "%{fmudflap|fmudflapth: -export-dynamic}" 533 #endif 534 535 /* When using -fsplit-stack we need to wrap pthread_create, in order 536 to initialize the stack guard. We always use wrapping, rather than 537 shared library ordering, and we keep the wrapper function in 538 libgcc. This is not yet a real spec, though it could become one; 539 it is currently just stuffed into LINK_SPEC. FIXME: This wrapping 540 only works with GNU ld and gold. FIXME: This is incompatible with 541 -fmudflap when linking statically, which wants to do its own 542 wrapping. */ 543 #define STACK_SPLIT_SPEC " %{fsplit-stack: --wrap=pthread_create}" 544 545 #ifndef LIBASAN_SPEC 546 #ifdef STATIC_LIBASAN_LIBS 547 #define ADD_STATIC_LIBASAN_LIBS \ 548 " %{static-libasan:" STATIC_LIBASAN_LIBS "}" 549 #else 550 #define ADD_STATIC_LIBASAN_LIBS 551 #endif 552 #ifdef LIBASAN_EARLY_SPEC 553 #define LIBASAN_SPEC ADD_STATIC_LIBASAN_LIBS 554 #elif defined(HAVE_LD_STATIC_DYNAMIC) 555 #define LIBASAN_SPEC "%{static-libasan:" LD_STATIC_OPTION \ 556 "} -lasan %{static-libasan:" LD_DYNAMIC_OPTION "}" \ 557 ADD_STATIC_LIBASAN_LIBS 558 #else 559 #define LIBASAN_SPEC "-lasan" ADD_STATIC_LIBASAN_LIBS 560 #endif 561 #endif 562 563 #ifndef LIBASAN_EARLY_SPEC 564 #define LIBASAN_EARLY_SPEC "" 565 #endif 566 567 #ifndef LIBTSAN_SPEC 568 #ifdef STATIC_LIBTSAN_LIBS 569 #define ADD_STATIC_LIBTSAN_LIBS \ 570 " %{static-libtsan:" STATIC_LIBTSAN_LIBS "}" 571 #else 572 #define ADD_STATIC_LIBTSAN_LIBS 573 #endif 574 #ifdef LIBTSAN_EARLY_SPEC 575 #define LIBTSAN_SPEC ADD_STATIC_LIBTSAN_LIBS 576 #elif defined(HAVE_LD_STATIC_DYNAMIC) 577 #define LIBTSAN_SPEC "%{static-libtsan:" LD_STATIC_OPTION \ 578 "} -ltsan %{static-libtsan:" LD_DYNAMIC_OPTION "}" \ 579 ADD_STATIC_LIBTSAN_LIBS 580 #else 581 #define LIBTSAN_SPEC "-ltsan" ADD_STATIC_LIBTSAN_LIBS 582 #endif 583 #endif 584 585 #ifndef LIBTSAN_EARLY_SPEC 586 #define LIBTSAN_EARLY_SPEC "" 587 #endif 588 589 /* config.h can define LIBGCC_SPEC to override how and when libgcc.a is 590 included. */ 591 #ifndef LIBGCC_SPEC 592 #if defined(REAL_LIBGCC_SPEC) 593 #define LIBGCC_SPEC REAL_LIBGCC_SPEC 594 #elif defined(LINK_LIBGCC_SPECIAL_1) 595 /* Have gcc do the search for libgcc.a. */ 596 #define LIBGCC_SPEC "libgcc.a%s" 597 #else 598 #define LIBGCC_SPEC "-lgcc" 599 #endif 600 #endif 601 602 /* config.h can define STARTFILE_SPEC to override the default crt0 files. */ 603 #ifndef STARTFILE_SPEC 604 #define STARTFILE_SPEC \ 605 "%{!shared:%{pg:gcrt0%O%s}%{!pg:%{p:mcrt0%O%s}%{!p:crt0%O%s}}}" 606 #endif 607 608 /* config.h can define ENDFILE_SPEC to override the default crtn files. */ 609 #ifndef ENDFILE_SPEC 610 #define ENDFILE_SPEC "" 611 #endif 612 613 #ifndef LINKER_NAME 614 #define LINKER_NAME "collect2" 615 #endif 616 617 #ifdef HAVE_AS_DEBUG_PREFIX_MAP 618 #define ASM_MAP " %{fdebug-prefix-map=*:--debug-prefix-map %*}" 619 #else 620 #define ASM_MAP "" 621 #endif 622 623 /* Define ASM_DEBUG_SPEC to be a spec suitable for translating '-g' 624 to the assembler. */ 625 #ifndef ASM_DEBUG_SPEC 626 # if defined(DBX_DEBUGGING_INFO) && defined(DWARF2_DEBUGGING_INFO) \ 627 && defined(HAVE_AS_GDWARF2_DEBUG_FLAG) && defined(HAVE_AS_GSTABS_DEBUG_FLAG) 628 # define ASM_DEBUG_SPEC \ 629 (PREFERRED_DEBUGGING_TYPE == DBX_DEBUG \ 630 ? "%{!g0:%{gdwarf-2*:--gdwarf2}%{!gdwarf-2*:%{g*:--gstabs}}}" ASM_MAP \ 631 : "%{!g0:%{gstabs*:--gstabs}%{!gstabs*:%{g*:--gdwarf2}}}" ASM_MAP) 632 # else 633 # if defined(DBX_DEBUGGING_INFO) && defined(HAVE_AS_GSTABS_DEBUG_FLAG) 634 # define ASM_DEBUG_SPEC "%{g*:%{!g0:--gstabs}}" ASM_MAP 635 # endif 636 # if defined(DWARF2_DEBUGGING_INFO) && defined(HAVE_AS_GDWARF2_DEBUG_FLAG) 637 # define ASM_DEBUG_SPEC "%{g*:%{!g0:--gdwarf2}}" ASM_MAP 638 # endif 639 # endif 640 #endif 641 #ifndef ASM_DEBUG_SPEC 642 # define ASM_DEBUG_SPEC "" 643 #endif 644 645 /* Here is the spec for running the linker, after compiling all files. */ 646 647 /* This is overridable by the target in case they need to specify the 648 -lgcc and -lc order specially, yet not require them to override all 649 of LINK_COMMAND_SPEC. */ 650 #ifndef LINK_GCC_C_SEQUENCE_SPEC 651 #define LINK_GCC_C_SEQUENCE_SPEC "%G %L %G" 652 #endif 653 654 #ifndef LINK_SSP_SPEC 655 #ifdef TARGET_LIBC_PROVIDES_SSP 656 #define LINK_SSP_SPEC "%{fstack-protector:}" 657 #else 658 #define LINK_SSP_SPEC "%{fstack-protector|fstack-protector-all:-lssp_nonshared -lssp}" 659 #endif 660 #endif 661 662 #ifndef LINK_PIE_SPEC 663 #ifdef HAVE_LD_PIE 664 #define LINK_PIE_SPEC "%{pie:-pie} " 665 #else 666 #define LINK_PIE_SPEC "%{pie:} " 667 #endif 668 #endif 669 670 #ifndef LINK_BUILDID_SPEC 671 # if defined(HAVE_LD_BUILDID) && defined(ENABLE_LD_BUILDID) 672 # define LINK_BUILDID_SPEC "%{!r:--build-id} " 673 # endif 674 #endif 675 676 /* Conditional to test whether the LTO plugin is used or not. 677 FIXME: For slim LTO we will need to enable plugin unconditionally. This 678 still cause problems with PLUGIN_LD != LD and when plugin is built but 679 not useable. For GCC 4.6 we don't support slim LTO and thus we can enable 680 plugin only when LTO is enabled. We still honor explicit 681 -fuse-linker-plugin if the linker used understands -plugin. */ 682 683 /* The linker has some plugin support. */ 684 #if HAVE_LTO_PLUGIN > 0 685 /* The linker used has full plugin support, use LTO plugin by default. */ 686 #if HAVE_LTO_PLUGIN == 2 687 #define PLUGIN_COND "!fno-use-linker-plugin:%{flto|flto=*|fuse-linker-plugin" 688 #define PLUGIN_COND_CLOSE "}" 689 #else 690 /* The linker used has limited plugin support, use LTO plugin with explicit 691 -fuse-linker-plugin. */ 692 #define PLUGIN_COND "fuse-linker-plugin" 693 #define PLUGIN_COND_CLOSE "" 694 #endif 695 #define LINK_PLUGIN_SPEC \ 696 "%{"PLUGIN_COND": \ 697 -plugin %(linker_plugin_file) \ 698 -plugin-opt=%(lto_wrapper) \ 699 -plugin-opt=-fresolution=%u.res \ 700 %{!nostdlib:%{!nodefaultlibs:%:pass-through-libs(%(link_gcc_c_sequence))}} \ 701 }"PLUGIN_COND_CLOSE 702 #else 703 /* The linker used doesn't support -plugin, reject -fuse-linker-plugin. */ 704 #define LINK_PLUGIN_SPEC "%{fuse-linker-plugin:\ 705 %e-fuse-linker-plugin is not supported in this configuration}" 706 #endif 707 708 /* Linker command line options for -fsanitize= early on the command line. */ 709 #ifndef SANITIZER_EARLY_SPEC 710 #define SANITIZER_EARLY_SPEC "\ 711 %{!nostdlib:%{!nodefaultlibs:%{fsanitize=address:" LIBASAN_EARLY_SPEC "} \ 712 %{fsanitize=thread:" LIBTSAN_EARLY_SPEC "}}}" 713 #endif 714 715 /* Linker command line options for -fsanitize= late on the command line. */ 716 #ifndef SANITIZER_SPEC 717 #define SANITIZER_SPEC "\ 718 %{!nostdlib:%{!nodefaultlibs:%{fsanitize=address:" LIBASAN_SPEC "\ 719 %{static:%ecannot specify -static with -fsanitize=address}\ 720 %{fsanitize=thread:%e-fsanitize=address is incompatible with -fsanitize=thread}}\ 721 %{fsanitize=thread:" LIBTSAN_SPEC "\ 722 %{!pie:%{!shared:%e-fsanitize=thread linking must be done with -pie or -shared}}}}}" 723 #endif 724 725 /* -u* was put back because both BSD and SysV seem to support it. */ 726 /* %{static:} simply prevents an error message if the target machine 727 doesn't handle -static. */ 728 /* We want %{T*} after %{L*} and %D so that it can be used to specify linker 729 scripts which exist in user specified directories, or in standard 730 directories. */ 731 /* We pass any -flto flags on to the linker, which is expected 732 to understand them. In practice, this means it had better be collect2. */ 733 /* %{e*} includes -export-dynamic; see comment in common.opt. */ 734 #ifndef LINK_COMMAND_SPEC 735 #define LINK_COMMAND_SPEC "\ 736 %{!fsyntax-only:%{!c:%{!M:%{!MM:%{!E:%{!S:\ 737 %(linker) " \ 738 LINK_PLUGIN_SPEC \ 739 "%{flto|flto=*:%<fcompare-debug*} \ 740 %{flto} %{flto=*} %l " LINK_PIE_SPEC \ 741 "%{fuse-ld=*:-fuse-ld=%*}\ 742 %X %{o*} %{e*} %{N} %{n} %{r}\ 743 %{s} %{t} %{u*} %{z} %{Z} %{!nostdlib:%{!nostartfiles:%S}}\ 744 %{static:} %{L*} %(mfwrap) %(link_libgcc) " SANITIZER_EARLY_SPEC " %o\ 745 %{fopenmp|ftree-parallelize-loops=*:%:include(libgomp.spec)%(link_gomp)}\ 746 %{fgnu-tm:%:include(libitm.spec)%(link_itm)}\ 747 %(mflib) " STACK_SPLIT_SPEC "\ 748 %{fprofile-arcs|fprofile-generate*|coverage:-lgcov} " SANITIZER_SPEC " \ 749 %{!nostdlib:%{!nodefaultlibs:%(link_ssp) %(link_gcc_c_sequence)}}\ 750 %{!nostdlib:%{!nostartfiles:%E}} %{T*} }}}}}}" 751 #endif 752 753 #ifndef LINK_LIBGCC_SPEC 754 /* Generate -L options for startfile prefix list. */ 755 # define LINK_LIBGCC_SPEC "%D" 756 #endif 757 758 #ifndef STARTFILE_PREFIX_SPEC 759 # define STARTFILE_PREFIX_SPEC "" 760 #endif 761 762 #ifndef SYSROOT_SPEC 763 # define SYSROOT_SPEC "--sysroot=%R" 764 #endif 765 766 #ifndef SYSROOT_SUFFIX_SPEC 767 # define SYSROOT_SUFFIX_SPEC "" 768 #endif 769 770 #ifndef SYSROOT_HEADERS_SUFFIX_SPEC 771 # define SYSROOT_HEADERS_SUFFIX_SPEC "" 772 #endif 773 774 static const char *asm_debug = ASM_DEBUG_SPEC; 775 static const char *cpp_spec = CPP_SPEC; 776 static const char *cc1_spec = CC1_SPEC; 777 static const char *cc1plus_spec = CC1PLUS_SPEC; 778 static const char *link_gcc_c_sequence_spec = LINK_GCC_C_SEQUENCE_SPEC; 779 static const char *link_ssp_spec = LINK_SSP_SPEC; 780 static const char *asm_spec = ASM_SPEC; 781 static const char *asm_final_spec = ASM_FINAL_SPEC; 782 static const char *link_spec = LINK_SPEC; 783 static const char *lib_spec = LIB_SPEC; 784 static const char *mfwrap_spec = MFWRAP_SPEC; 785 static const char *mflib_spec = MFLIB_SPEC; 786 static const char *link_gomp_spec = ""; 787 static const char *libgcc_spec = LIBGCC_SPEC; 788 static const char *endfile_spec = ENDFILE_SPEC; 789 static const char *startfile_spec = STARTFILE_SPEC; 790 static const char *linker_name_spec = LINKER_NAME; 791 static const char *linker_plugin_file_spec = ""; 792 static const char *lto_wrapper_spec = ""; 793 static const char *lto_gcc_spec = ""; 794 static const char *link_command_spec = LINK_COMMAND_SPEC; 795 static const char *link_libgcc_spec = LINK_LIBGCC_SPEC; 796 static const char *startfile_prefix_spec = STARTFILE_PREFIX_SPEC; 797 static const char *sysroot_spec = SYSROOT_SPEC; 798 static const char *sysroot_suffix_spec = SYSROOT_SUFFIX_SPEC; 799 static const char *sysroot_hdrs_suffix_spec = SYSROOT_HEADERS_SUFFIX_SPEC; 800 static const char *self_spec = ""; 801 802 /* Standard options to cpp, cc1, and as, to reduce duplication in specs. 803 There should be no need to override these in target dependent files, 804 but we need to copy them to the specs file so that newer versions 805 of the GCC driver can correctly drive older tool chains with the 806 appropriate -B options. */ 807 808 /* When cpplib handles traditional preprocessing, get rid of this, and 809 call cc1 (or cc1obj in objc/lang-specs.h) from the main specs so 810 that we default the front end language better. */ 811 static const char *trad_capable_cpp = 812 "cc1 -E %{traditional|traditional-cpp:-traditional-cpp}"; 813 814 /* We don't wrap .d files in %W{} since a missing .d file, and 815 therefore no dependency entry, confuses make into thinking a .o 816 file that happens to exist is up-to-date. */ 817 static const char *cpp_unique_options = 818 "%{!Q:-quiet} %{nostdinc*} %{C} %{CC} %{v} %{I*&F*} %{P} %I\ 819 %{MD:-MD %{!o:%b.d}%{o*:%.d%*}}\ 820 %{MMD:-MMD %{!o:%b.d}%{o*:%.d%*}}\ 821 %{M} %{MM} %{MF*} %{MG} %{MP} %{MQ*} %{MT*}\ 822 %{!E:%{!M:%{!MM:%{!MT:%{!MQ:%{MD|MMD:%{o*:-MQ %*}}}}}}}\ 823 %{remap} %{g3|ggdb3|gstabs3|gcoff3|gxcoff3|gvms3:-dD}\ 824 %{!iplugindir*:%{fplugin*:%:find-plugindir()}}\ 825 %{H} %C %{D*&U*&A*} %{i*} %Z %i\ 826 %{fmudflap:-D_MUDFLAP -include mf-runtime.h}\ 827 %{fmudflapth:-D_MUDFLAP -D_MUDFLAPTH -include mf-runtime.h}\ 828 %{E|M|MM:%W{o*}}"; 829 830 /* This contains cpp options which are common with cc1_options and are passed 831 only when preprocessing only to avoid duplication. We pass the cc1 spec 832 options to the preprocessor so that it the cc1 spec may manipulate 833 options used to set target flags. Those special target flags settings may 834 in turn cause preprocessor symbols to be defined specially. */ 835 static const char *cpp_options = 836 "%(cpp_unique_options) %1 %{m*} %{std*&ansi&trigraphs} %{W*&pedantic*} %{w}\ 837 %{f*} %{g*:%{!g0:%{g*} %{!fno-working-directory:-fworking-directory}}} %{O*}\ 838 %{undef} %{save-temps*:-fpch-preprocess}"; 839 840 /* This contains cpp options which are not passed when the preprocessor 841 output will be used by another program. */ 842 static const char *cpp_debug_options = "%{d*}"; 843 844 /* NB: This is shared amongst all front-ends, except for Ada. */ 845 static const char *cc1_options = 846 "%{pg:%{fomit-frame-pointer:%e-pg and -fomit-frame-pointer are incompatible}}\ 847 %{!iplugindir*:%{fplugin*:%:find-plugindir()}}\ 848 %1 %{!Q:-quiet} %{!dumpbase:-dumpbase %B} %{d*} %{m*} %{aux-info*}\ 849 %{fcompare-debug-second:%:compare-debug-auxbase-opt(%b)} \ 850 %{!fcompare-debug-second:%{c|S:%{o*:-auxbase-strip %*}%{!o*:-auxbase %b}}}%{!c:%{!S:-auxbase %b}} \ 851 %{g*} %{O*} %{W*&pedantic*} %{w} %{std*&ansi&trigraphs}\ 852 %{v:-version} %{pg:-p} %{p} %{f*} %{undef}\ 853 %{Qn:-fno-ident} %{Qy:} %{-help:--help}\ 854 %{-target-help:--target-help}\ 855 %{-version:--version}\ 856 %{-help=*:--help=%*}\ 857 %{!fsyntax-only:%{S:%W{o*}%{!o*:-o %b.s}}}\ 858 %{fsyntax-only:-o %j} %{-param*}\ 859 %{fmudflap|fmudflapth:-fno-builtin -fno-merge-constants}\ 860 %{coverage:-fprofile-arcs -ftest-coverage}"; 861 862 static const char *asm_options = 863 "%{-target-help:%:print-asm-header()} " 864 #if HAVE_GNU_AS 865 /* If GNU AS is used, then convert -w (no warnings), -I, and -v 866 to the assembler equivalents. */ 867 "%{v} %{w:-W} %{I*} " 868 #endif 869 "%a %Y %{c:%W{o*}%{!o*:-o %w%b%O}}%{!c:-o %d%w%u%O}"; 870 871 static const char *invoke_as = 872 #ifdef AS_NEEDS_DASH_FOR_PIPED_INPUT 873 "%{!fwpa:\ 874 %{fcompare-debug=*|fdump-final-insns=*:%:compare-debug-dump-opt()}\ 875 %{!S:-o %|.s |\n as %(asm_options) %|.s %A }\ 876 }"; 877 #else 878 "%{!fwpa:\ 879 %{fcompare-debug=*|fdump-final-insns=*:%:compare-debug-dump-opt()}\ 880 %{!S:-o %|.s |\n as %(asm_options) %m.s %A }\ 881 }"; 882 #endif 883 884 /* Some compilers have limits on line lengths, and the multilib_select 885 and/or multilib_matches strings can be very long, so we build them at 886 run time. */ 887 static struct obstack multilib_obstack; 888 static const char *multilib_select; 889 static const char *multilib_matches; 890 static const char *multilib_defaults; 891 static const char *multilib_exclusions; 892 static const char *multilib_reuse; 893 894 /* Check whether a particular argument is a default argument. */ 895 896 #ifndef MULTILIB_DEFAULTS 897 #define MULTILIB_DEFAULTS { "" } 898 #endif 899 900 static const char *const multilib_defaults_raw[] = MULTILIB_DEFAULTS; 901 902 #ifndef DRIVER_SELF_SPECS 903 #define DRIVER_SELF_SPECS "" 904 #endif 905 906 /* Adding -fopenmp should imply pthreads. This is particularly important 907 for targets that use different start files and suchlike. */ 908 #ifndef GOMP_SELF_SPECS 909 #define GOMP_SELF_SPECS "%{fopenmp|ftree-parallelize-loops=*: -pthread}" 910 #endif 911 912 /* Likewise for -fgnu-tm. */ 913 #ifndef GTM_SELF_SPECS 914 #define GTM_SELF_SPECS "%{fgnu-tm: -pthread}" 915 #endif 916 917 static const char *const driver_self_specs[] = { 918 "%{fdump-final-insns:-fdump-final-insns=.} %<fdump-final-insns", 919 DRIVER_SELF_SPECS, CONFIGURE_SPECS, GOMP_SELF_SPECS, GTM_SELF_SPECS 920 }; 921 922 #ifndef OPTION_DEFAULT_SPECS 923 #define OPTION_DEFAULT_SPECS { "", "" } 924 #endif 925 926 struct default_spec 927 { 928 const char *name; 929 const char *spec; 930 }; 931 932 static const struct default_spec 933 option_default_specs[] = { OPTION_DEFAULT_SPECS }; 934 935 struct user_specs 936 { 937 struct user_specs *next; 938 const char *filename; 939 }; 940 941 static struct user_specs *user_specs_head, *user_specs_tail; 942 943 944 /* Record the mapping from file suffixes for compilation specs. */ 945 946 struct compiler 947 { 948 const char *suffix; /* Use this compiler for input files 949 whose names end in this suffix. */ 950 951 const char *spec; /* To use this compiler, run this spec. */ 952 953 const char *cpp_spec; /* If non-NULL, substitute this spec 954 for `%C', rather than the usual 955 cpp_spec. */ 956 const int combinable; /* If nonzero, compiler can deal with 957 multiple source files at once (IMA). */ 958 const int needs_preprocessing; /* If nonzero, source files need to 959 be run through a preprocessor. */ 960 }; 961 962 /* Pointer to a vector of `struct compiler' that gives the spec for 963 compiling a file, based on its suffix. 964 A file that does not end in any of these suffixes will be passed 965 unchanged to the loader and nothing else will be done to it. 966 967 An entry containing two 0s is used to terminate the vector. 968 969 If multiple entries match a file, the last matching one is used. */ 970 971 static struct compiler *compilers; 972 973 /* Number of entries in `compilers', not counting the null terminator. */ 974 975 static int n_compilers; 976 977 /* The default list of file name suffixes and their compilation specs. */ 978 979 static const struct compiler default_compilers[] = 980 { 981 /* Add lists of suffixes of known languages here. If those languages 982 were not present when we built the driver, we will hit these copies 983 and be given a more meaningful error than "file not used since 984 linking is not done". */ 985 {".m", "#Objective-C", 0, 0, 0}, {".mi", "#Objective-C", 0, 0, 0}, 986 {".mm", "#Objective-C++", 0, 0, 0}, {".M", "#Objective-C++", 0, 0, 0}, 987 {".mii", "#Objective-C++", 0, 0, 0}, 988 {".cc", "#C++", 0, 0, 0}, {".cxx", "#C++", 0, 0, 0}, 989 {".cpp", "#C++", 0, 0, 0}, {".cp", "#C++", 0, 0, 0}, 990 {".c++", "#C++", 0, 0, 0}, {".C", "#C++", 0, 0, 0}, 991 {".CPP", "#C++", 0, 0, 0}, {".ii", "#C++", 0, 0, 0}, 992 {".ads", "#Ada", 0, 0, 0}, {".adb", "#Ada", 0, 0, 0}, 993 {".f", "#Fortran", 0, 0, 0}, {".F", "#Fortran", 0, 0, 0}, 994 {".for", "#Fortran", 0, 0, 0}, {".FOR", "#Fortran", 0, 0, 0}, 995 {".ftn", "#Fortran", 0, 0, 0}, {".FTN", "#Fortran", 0, 0, 0}, 996 {".fpp", "#Fortran", 0, 0, 0}, {".FPP", "#Fortran", 0, 0, 0}, 997 {".f90", "#Fortran", 0, 0, 0}, {".F90", "#Fortran", 0, 0, 0}, 998 {".f95", "#Fortran", 0, 0, 0}, {".F95", "#Fortran", 0, 0, 0}, 999 {".f03", "#Fortran", 0, 0, 0}, {".F03", "#Fortran", 0, 0, 0}, 1000 {".f08", "#Fortran", 0, 0, 0}, {".F08", "#Fortran", 0, 0, 0}, 1001 {".r", "#Ratfor", 0, 0, 0}, 1002 {".p", "#Pascal", 0, 0, 0}, {".pas", "#Pascal", 0, 0, 0}, 1003 {".java", "#Java", 0, 0, 0}, {".class", "#Java", 0, 0, 0}, 1004 {".zip", "#Java", 0, 0, 0}, {".jar", "#Java", 0, 0, 0}, 1005 {".go", "#Go", 0, 1, 0}, 1006 /* Next come the entries for C. */ 1007 {".c", "@c", 0, 0, 1}, 1008 {"@c", 1009 /* cc1 has an integrated ISO C preprocessor. We should invoke the 1010 external preprocessor if -save-temps is given. */ 1011 "%{E|M|MM:%(trad_capable_cpp) %(cpp_options) %(cpp_debug_options)}\ 1012 %{!E:%{!M:%{!MM:\ 1013 %{traditional:\ 1014 %eGNU C no longer supports -traditional without -E}\ 1015 %{save-temps*|traditional-cpp|no-integrated-cpp:%(trad_capable_cpp) \ 1016 %(cpp_options) -o %{save-temps*:%b.i} %{!save-temps*:%g.i} \n\ 1017 cc1 -fpreprocessed %{save-temps*:%b.i} %{!save-temps*:%g.i} \ 1018 %(cc1_options)}\ 1019 %{!save-temps*:%{!traditional-cpp:%{!no-integrated-cpp:\ 1020 cc1 %(cpp_unique_options) %(cc1_options)}}}\ 1021 %{!fsyntax-only:%(invoke_as)}}}}", 0, 0, 1}, 1022 {"-", 1023 "%{!E:%e-E or -x required when input is from standard input}\ 1024 %(trad_capable_cpp) %(cpp_options) %(cpp_debug_options)", 0, 0, 0}, 1025 {".h", "@c-header", 0, 0, 0}, 1026 {"@c-header", 1027 /* cc1 has an integrated ISO C preprocessor. We should invoke the 1028 external preprocessor if -save-temps is given. */ 1029 "%{E|M|MM:%(trad_capable_cpp) %(cpp_options) %(cpp_debug_options)}\ 1030 %{!E:%{!M:%{!MM:\ 1031 %{save-temps*|traditional-cpp|no-integrated-cpp:%(trad_capable_cpp) \ 1032 %(cpp_options) -o %{save-temps*:%b.i} %{!save-temps*:%g.i} \n\ 1033 cc1 -fpreprocessed %{save-temps*:%b.i} %{!save-temps*:%g.i} \ 1034 %(cc1_options)\ 1035 %{!fdump-ada-spec*:-o %g.s %{!o*:--output-pch=%i.gch}\ 1036 %W{o*:--output-pch=%*}}%V}\ 1037 %{!save-temps*:%{!traditional-cpp:%{!no-integrated-cpp:\ 1038 cc1 %(cpp_unique_options) %(cc1_options)\ 1039 %{!fdump-ada-spec*:-o %g.s %{!o*:--output-pch=%i.gch}\ 1040 %W{o*:--output-pch=%*}}%V}}}}}}", 0, 0, 0}, 1041 {".i", "@cpp-output", 0, 0, 0}, 1042 {"@cpp-output", 1043 "%{!M:%{!MM:%{!E:cc1 -fpreprocessed %i %(cc1_options) %{!fsyntax-only:%(invoke_as)}}}}", 0, 0, 0}, 1044 {".s", "@assembler", 0, 0, 0}, 1045 {"@assembler", 1046 "%{!M:%{!MM:%{!E:%{!S:as %(asm_debug) %(asm_options) %i %A }}}}", 0, 0, 0}, 1047 {".sx", "@assembler-with-cpp", 0, 0, 0}, 1048 {".S", "@assembler-with-cpp", 0, 0, 0}, 1049 {"@assembler-with-cpp", 1050 #ifdef AS_NEEDS_DASH_FOR_PIPED_INPUT 1051 "%(trad_capable_cpp) -lang-asm %(cpp_options) -fno-directives-only\ 1052 %{E|M|MM:%(cpp_debug_options)}\ 1053 %{!M:%{!MM:%{!E:%{!S:-o %|.s |\n\ 1054 as %(asm_debug) %(asm_options) %|.s %A }}}}" 1055 #else 1056 "%(trad_capable_cpp) -lang-asm %(cpp_options) -fno-directives-only\ 1057 %{E|M|MM:%(cpp_debug_options)}\ 1058 %{!M:%{!MM:%{!E:%{!S:-o %|.s |\n\ 1059 as %(asm_debug) %(asm_options) %m.s %A }}}}" 1060 #endif 1061 , 0, 0, 0}, 1062 1063 #include "specs.h" 1064 /* Mark end of table. */ 1065 {0, 0, 0, 0, 0} 1066 }; 1067 1068 /* Number of elements in default_compilers, not counting the terminator. */ 1069 1070 static const int n_default_compilers = ARRAY_SIZE (default_compilers) - 1; 1071 1072 typedef char *char_p; /* For DEF_VEC_P. */ 1073 1074 /* A vector of options to give to the linker. 1075 These options are accumulated by %x, 1076 and substituted into the linker command with %X. */ 1077 static vec<char_p> linker_options; 1078 1079 /* A vector of options to give to the assembler. 1080 These options are accumulated by -Wa, 1081 and substituted into the assembler command with %Y. */ 1082 static vec<char_p> assembler_options; 1083 1084 /* A vector of options to give to the preprocessor. 1085 These options are accumulated by -Wp, 1086 and substituted into the preprocessor command with %Z. */ 1087 static vec<char_p> preprocessor_options; 1088 1089 static char * 1090 skip_whitespace (char *p) 1091 { 1092 while (1) 1093 { 1094 /* A fully-blank line is a delimiter in the SPEC file and shouldn't 1095 be considered whitespace. */ 1096 if (p[0] == '\n' && p[1] == '\n' && p[2] == '\n') 1097 return p + 1; 1098 else if (*p == '\n' || *p == ' ' || *p == '\t') 1099 p++; 1100 else if (*p == '#') 1101 { 1102 while (*p != '\n') 1103 p++; 1104 p++; 1105 } 1106 else 1107 break; 1108 } 1109 1110 return p; 1111 } 1112 /* Structures to keep track of prefixes to try when looking for files. */ 1113 1114 struct prefix_list 1115 { 1116 const char *prefix; /* String to prepend to the path. */ 1117 struct prefix_list *next; /* Next in linked list. */ 1118 int require_machine_suffix; /* Don't use without machine_suffix. */ 1119 /* 2 means try both machine_suffix and just_machine_suffix. */ 1120 int priority; /* Sort key - priority within list. */ 1121 int os_multilib; /* 1 if OS multilib scheme should be used, 1122 0 for GCC multilib scheme. */ 1123 }; 1124 1125 struct path_prefix 1126 { 1127 struct prefix_list *plist; /* List of prefixes to try */ 1128 int max_len; /* Max length of a prefix in PLIST */ 1129 const char *name; /* Name of this list (used in config stuff) */ 1130 }; 1131 1132 /* List of prefixes to try when looking for executables. */ 1133 1134 static struct path_prefix exec_prefixes = { 0, 0, "exec" }; 1135 1136 /* List of prefixes to try when looking for startup (crt0) files. */ 1137 1138 static struct path_prefix startfile_prefixes = { 0, 0, "startfile" }; 1139 1140 /* List of prefixes to try when looking for include files. */ 1141 1142 static struct path_prefix include_prefixes = { 0, 0, "include" }; 1143 1144 /* Suffix to attach to directories searched for commands. 1145 This looks like `MACHINE/VERSION/'. */ 1146 1147 static const char *machine_suffix = 0; 1148 1149 /* Suffix to attach to directories searched for commands. 1150 This is just `MACHINE/'. */ 1151 1152 static const char *just_machine_suffix = 0; 1153 1154 /* Adjusted value of GCC_EXEC_PREFIX envvar. */ 1155 1156 static const char *gcc_exec_prefix; 1157 1158 /* Adjusted value of standard_libexec_prefix. */ 1159 1160 static const char *gcc_libexec_prefix; 1161 1162 /* Default prefixes to attach to command names. */ 1163 1164 #ifndef STANDARD_STARTFILE_PREFIX_1 1165 #define STANDARD_STARTFILE_PREFIX_1 "/lib/" 1166 #endif 1167 #ifndef STANDARD_STARTFILE_PREFIX_2 1168 #define STANDARD_STARTFILE_PREFIX_2 "/usr/lib/" 1169 #endif 1170 1171 #ifdef CROSS_DIRECTORY_STRUCTURE /* Don't use these prefixes for a cross compiler. */ 1172 #undef MD_EXEC_PREFIX 1173 #undef MD_STARTFILE_PREFIX 1174 #undef MD_STARTFILE_PREFIX_1 1175 #endif 1176 1177 /* If no prefixes defined, use the null string, which will disable them. */ 1178 #ifndef MD_EXEC_PREFIX 1179 #define MD_EXEC_PREFIX "" 1180 #endif 1181 #ifndef MD_STARTFILE_PREFIX 1182 #define MD_STARTFILE_PREFIX "" 1183 #endif 1184 #ifndef MD_STARTFILE_PREFIX_1 1185 #define MD_STARTFILE_PREFIX_1 "" 1186 #endif 1187 1188 /* These directories are locations set at configure-time based on the 1189 --prefix option provided to configure. Their initializers are 1190 defined in Makefile.in. These paths are not *directly* used when 1191 gcc_exec_prefix is set because, in that case, we know where the 1192 compiler has been installed, and use paths relative to that 1193 location instead. */ 1194 static const char *const standard_exec_prefix = STANDARD_EXEC_PREFIX; 1195 static const char *const standard_libexec_prefix = STANDARD_LIBEXEC_PREFIX; 1196 static const char *const standard_bindir_prefix = STANDARD_BINDIR_PREFIX; 1197 static const char *const standard_startfile_prefix = STANDARD_STARTFILE_PREFIX; 1198 1199 /* For native compilers, these are well-known paths containing 1200 components that may be provided by the system. For cross 1201 compilers, these paths are not used. */ 1202 static const char *md_exec_prefix = MD_EXEC_PREFIX; 1203 static const char *md_startfile_prefix = MD_STARTFILE_PREFIX; 1204 static const char *md_startfile_prefix_1 = MD_STARTFILE_PREFIX_1; 1205 static const char *const standard_startfile_prefix_1 1206 = STANDARD_STARTFILE_PREFIX_1; 1207 static const char *const standard_startfile_prefix_2 1208 = STANDARD_STARTFILE_PREFIX_2; 1209 1210 /* A relative path to be used in finding the location of tools 1211 relative to the driver. */ 1212 static const char *const tooldir_base_prefix = TOOLDIR_BASE_PREFIX; 1213 1214 /* Subdirectory to use for locating libraries. Set by 1215 set_multilib_dir based on the compilation options. */ 1216 1217 static const char *multilib_dir; 1218 1219 /* Subdirectory to use for locating libraries in OS conventions. Set by 1220 set_multilib_dir based on the compilation options. */ 1221 1222 static const char *multilib_os_dir; 1223 1224 /* Subdirectory to use for locating libraries in multiarch conventions. Set by 1225 set_multilib_dir based on the compilation options. */ 1226 1227 static const char *multiarch_dir; 1228 1229 /* Structure to keep track of the specs that have been defined so far. 1230 These are accessed using %(specname) in a compiler or link 1231 spec. */ 1232 1233 struct spec_list 1234 { 1235 /* The following 2 fields must be first */ 1236 /* to allow EXTRA_SPECS to be initialized */ 1237 const char *name; /* name of the spec. */ 1238 const char *ptr; /* available ptr if no static pointer */ 1239 1240 /* The following fields are not initialized */ 1241 /* by EXTRA_SPECS */ 1242 const char **ptr_spec; /* pointer to the spec itself. */ 1243 struct spec_list *next; /* Next spec in linked list. */ 1244 int name_len; /* length of the name */ 1245 bool user_p; /* whether string come from file spec. */ 1246 bool alloc_p; /* whether string was allocated */ 1247 }; 1248 1249 #define INIT_STATIC_SPEC(NAME,PTR) \ 1250 { NAME, NULL, PTR, (struct spec_list *) 0, sizeof (NAME) - 1, false, false } 1251 1252 /* List of statically defined specs. */ 1253 static struct spec_list static_specs[] = 1254 { 1255 INIT_STATIC_SPEC ("asm", &asm_spec), 1256 INIT_STATIC_SPEC ("asm_debug", &asm_debug), 1257 INIT_STATIC_SPEC ("asm_final", &asm_final_spec), 1258 INIT_STATIC_SPEC ("asm_options", &asm_options), 1259 INIT_STATIC_SPEC ("invoke_as", &invoke_as), 1260 INIT_STATIC_SPEC ("cpp", &cpp_spec), 1261 INIT_STATIC_SPEC ("cpp_options", &cpp_options), 1262 INIT_STATIC_SPEC ("cpp_debug_options", &cpp_debug_options), 1263 INIT_STATIC_SPEC ("cpp_unique_options", &cpp_unique_options), 1264 INIT_STATIC_SPEC ("trad_capable_cpp", &trad_capable_cpp), 1265 INIT_STATIC_SPEC ("cc1", &cc1_spec), 1266 INIT_STATIC_SPEC ("cc1_options", &cc1_options), 1267 INIT_STATIC_SPEC ("cc1plus", &cc1plus_spec), 1268 INIT_STATIC_SPEC ("link_gcc_c_sequence", &link_gcc_c_sequence_spec), 1269 INIT_STATIC_SPEC ("link_ssp", &link_ssp_spec), 1270 INIT_STATIC_SPEC ("endfile", &endfile_spec), 1271 INIT_STATIC_SPEC ("link", &link_spec), 1272 INIT_STATIC_SPEC ("lib", &lib_spec), 1273 INIT_STATIC_SPEC ("mfwrap", &mfwrap_spec), 1274 INIT_STATIC_SPEC ("mflib", &mflib_spec), 1275 INIT_STATIC_SPEC ("link_gomp", &link_gomp_spec), 1276 INIT_STATIC_SPEC ("libgcc", &libgcc_spec), 1277 INIT_STATIC_SPEC ("startfile", &startfile_spec), 1278 INIT_STATIC_SPEC ("cross_compile", &cross_compile), 1279 INIT_STATIC_SPEC ("version", &compiler_version), 1280 INIT_STATIC_SPEC ("multilib", &multilib_select), 1281 INIT_STATIC_SPEC ("multilib_defaults", &multilib_defaults), 1282 INIT_STATIC_SPEC ("multilib_extra", &multilib_extra), 1283 INIT_STATIC_SPEC ("multilib_matches", &multilib_matches), 1284 INIT_STATIC_SPEC ("multilib_exclusions", &multilib_exclusions), 1285 INIT_STATIC_SPEC ("multilib_options", &multilib_options), 1286 INIT_STATIC_SPEC ("multilib_reuse", &multilib_reuse), 1287 INIT_STATIC_SPEC ("linker", &linker_name_spec), 1288 INIT_STATIC_SPEC ("linker_plugin_file", &linker_plugin_file_spec), 1289 INIT_STATIC_SPEC ("lto_wrapper", <o_wrapper_spec), 1290 INIT_STATIC_SPEC ("lto_gcc", <o_gcc_spec), 1291 INIT_STATIC_SPEC ("link_libgcc", &link_libgcc_spec), 1292 INIT_STATIC_SPEC ("md_exec_prefix", &md_exec_prefix), 1293 INIT_STATIC_SPEC ("md_startfile_prefix", &md_startfile_prefix), 1294 INIT_STATIC_SPEC ("md_startfile_prefix_1", &md_startfile_prefix_1), 1295 INIT_STATIC_SPEC ("startfile_prefix_spec", &startfile_prefix_spec), 1296 INIT_STATIC_SPEC ("sysroot_spec", &sysroot_spec), 1297 INIT_STATIC_SPEC ("sysroot_suffix_spec", &sysroot_suffix_spec), 1298 INIT_STATIC_SPEC ("sysroot_hdrs_suffix_spec", &sysroot_hdrs_suffix_spec), 1299 INIT_STATIC_SPEC ("self_spec", &self_spec), 1300 }; 1301 1302 #ifdef EXTRA_SPECS /* additional specs needed */ 1303 /* Structure to keep track of just the first two args of a spec_list. 1304 That is all that the EXTRA_SPECS macro gives us. */ 1305 struct spec_list_1 1306 { 1307 const char *const name; 1308 const char *const ptr; 1309 }; 1310 1311 static const struct spec_list_1 extra_specs_1[] = { EXTRA_SPECS }; 1312 static struct spec_list *extra_specs = (struct spec_list *) 0; 1313 #endif 1314 1315 /* List of dynamically allocates specs that have been defined so far. */ 1316 1317 static struct spec_list *specs = (struct spec_list *) 0; 1318 1319 /* List of static spec functions. */ 1320 1321 static const struct spec_function static_spec_functions[] = 1322 { 1323 { "getenv", getenv_spec_function }, 1324 { "if-exists", if_exists_spec_function }, 1325 { "if-exists-else", if_exists_else_spec_function }, 1326 { "replace-outfile", replace_outfile_spec_function }, 1327 { "remove-outfile", remove_outfile_spec_function }, 1328 { "version-compare", version_compare_spec_function }, 1329 { "include", include_spec_function }, 1330 { "find-file", find_file_spec_function }, 1331 { "find-plugindir", find_plugindir_spec_function }, 1332 { "print-asm-header", print_asm_header_spec_function }, 1333 { "compare-debug-dump-opt", compare_debug_dump_opt_spec_function }, 1334 { "compare-debug-self-opt", compare_debug_self_opt_spec_function }, 1335 { "compare-debug-auxbase-opt", compare_debug_auxbase_opt_spec_function }, 1336 { "pass-through-libs", pass_through_libs_spec_func }, 1337 { "replace-extension", replace_extension_spec_func }, 1338 #ifdef EXTRA_SPEC_FUNCTIONS 1339 EXTRA_SPEC_FUNCTIONS 1340 #endif 1341 { 0, 0 } 1342 }; 1343 1344 static int processing_spec_function; 1345 1346 /* Add appropriate libgcc specs to OBSTACK, taking into account 1347 various permutations of -shared-libgcc, -shared, and such. */ 1348 1349 #if defined(ENABLE_SHARED_LIBGCC) && !defined(REAL_LIBGCC_SPEC) 1350 1351 #ifndef USE_LD_AS_NEEDED 1352 #define USE_LD_AS_NEEDED 0 1353 #endif 1354 1355 static void 1356 init_gcc_specs (struct obstack *obstack, const char *shared_name, 1357 const char *static_name, const char *eh_name) 1358 { 1359 char *buf; 1360 1361 buf = concat ("%{static|static-libgcc:", static_name, " ", eh_name, "}" 1362 "%{!static:%{!static-libgcc:" 1363 #if USE_LD_AS_NEEDED 1364 "%{!shared-libgcc:", 1365 static_name, " --as-needed ", shared_name, " --no-as-needed" 1366 "}" 1367 "%{shared-libgcc:", 1368 "--as-needed ", shared_name, " --no-as-needed ", static_name, 1369 "}" 1370 #else 1371 "%{!shared:" 1372 "%{!shared-libgcc:", static_name, " ", eh_name, "}" 1373 "%{shared-libgcc:", shared_name, " ", static_name, "}" 1374 "}" 1375 #ifdef LINK_EH_SPEC 1376 "%{shared:" 1377 "%{shared-libgcc:", shared_name, "}" 1378 "%{!shared-libgcc:", static_name, "}" 1379 "}" 1380 #else 1381 "%{shared:", shared_name, "}" 1382 #endif 1383 #endif 1384 "}}", NULL); 1385 1386 obstack_grow (obstack, buf, strlen (buf)); 1387 free (buf); 1388 } 1389 #endif /* ENABLE_SHARED_LIBGCC */ 1390 1391 /* Initialize the specs lookup routines. */ 1392 1393 static void 1394 init_spec (void) 1395 { 1396 struct spec_list *next = (struct spec_list *) 0; 1397 struct spec_list *sl = (struct spec_list *) 0; 1398 int i; 1399 1400 if (specs) 1401 return; /* Already initialized. */ 1402 1403 if (verbose_flag) 1404 fnotice (stderr, "Using built-in specs.\n"); 1405 1406 #ifdef EXTRA_SPECS 1407 extra_specs = XCNEWVEC (struct spec_list, ARRAY_SIZE (extra_specs_1)); 1408 1409 for (i = ARRAY_SIZE (extra_specs_1) - 1; i >= 0; i--) 1410 { 1411 sl = &extra_specs[i]; 1412 sl->name = extra_specs_1[i].name; 1413 sl->ptr = extra_specs_1[i].ptr; 1414 sl->next = next; 1415 sl->name_len = strlen (sl->name); 1416 sl->ptr_spec = &sl->ptr; 1417 next = sl; 1418 } 1419 #endif 1420 1421 for (i = ARRAY_SIZE (static_specs) - 1; i >= 0; i--) 1422 { 1423 sl = &static_specs[i]; 1424 sl->next = next; 1425 next = sl; 1426 } 1427 1428 #if defined(ENABLE_SHARED_LIBGCC) && !defined(REAL_LIBGCC_SPEC) 1429 /* ??? If neither -shared-libgcc nor --static-libgcc was 1430 seen, then we should be making an educated guess. Some proposed 1431 heuristics for ELF include: 1432 1433 (1) If "-Wl,--export-dynamic", then it's a fair bet that the 1434 program will be doing dynamic loading, which will likely 1435 need the shared libgcc. 1436 1437 (2) If "-ldl", then it's also a fair bet that we're doing 1438 dynamic loading. 1439 1440 (3) For each ET_DYN we're linking against (either through -lfoo 1441 or /some/path/foo.so), check to see whether it or one of 1442 its dependencies depends on a shared libgcc. 1443 1444 (4) If "-shared" 1445 1446 If the runtime is fixed to look for program headers instead 1447 of calling __register_frame_info at all, for each object, 1448 use the shared libgcc if any EH symbol referenced. 1449 1450 If crtstuff is fixed to not invoke __register_frame_info 1451 automatically, for each object, use the shared libgcc if 1452 any non-empty unwind section found. 1453 1454 Doing any of this probably requires invoking an external program to 1455 do the actual object file scanning. */ 1456 { 1457 const char *p = libgcc_spec; 1458 int in_sep = 1; 1459 1460 /* Transform the extant libgcc_spec into one that uses the shared libgcc 1461 when given the proper command line arguments. */ 1462 while (*p) 1463 { 1464 if (in_sep && *p == '-' && strncmp (p, "-lgcc", 5) == 0) 1465 { 1466 init_gcc_specs (&obstack, 1467 "-lgcc_s" 1468 #ifdef USE_LIBUNWIND_EXCEPTIONS 1469 " -lunwind" 1470 #endif 1471 , 1472 "-lgcc", 1473 "-lgcc_eh" 1474 #ifdef USE_LIBUNWIND_EXCEPTIONS 1475 # ifdef HAVE_LD_STATIC_DYNAMIC 1476 " %{!static:" LD_STATIC_OPTION "} -lunwind" 1477 " %{!static:" LD_DYNAMIC_OPTION "}" 1478 # else 1479 " -lunwind" 1480 # endif 1481 #endif 1482 ); 1483 1484 p += 5; 1485 in_sep = 0; 1486 } 1487 else if (in_sep && *p == 'l' && strncmp (p, "libgcc.a%s", 10) == 0) 1488 { 1489 /* Ug. We don't know shared library extensions. Hope that 1490 systems that use this form don't do shared libraries. */ 1491 init_gcc_specs (&obstack, 1492 "-lgcc_s", 1493 "libgcc.a%s", 1494 "libgcc_eh.a%s" 1495 #ifdef USE_LIBUNWIND_EXCEPTIONS 1496 " -lunwind" 1497 #endif 1498 ); 1499 p += 10; 1500 in_sep = 0; 1501 } 1502 else 1503 { 1504 obstack_1grow (&obstack, *p); 1505 in_sep = (*p == ' '); 1506 p += 1; 1507 } 1508 } 1509 1510 obstack_1grow (&obstack, '\0'); 1511 libgcc_spec = XOBFINISH (&obstack, const char *); 1512 } 1513 #endif 1514 #ifdef USE_AS_TRADITIONAL_FORMAT 1515 /* Prepend "--traditional-format" to whatever asm_spec we had before. */ 1516 { 1517 static const char tf[] = "--traditional-format "; 1518 obstack_grow (&obstack, tf, sizeof(tf) - 1); 1519 obstack_grow0 (&obstack, asm_spec, strlen (asm_spec)); 1520 asm_spec = XOBFINISH (&obstack, const char *); 1521 } 1522 #endif 1523 1524 #if defined LINK_EH_SPEC || defined LINK_BUILDID_SPEC || \ 1525 defined LINKER_HASH_STYLE 1526 # ifdef LINK_BUILDID_SPEC 1527 /* Prepend LINK_BUILDID_SPEC to whatever link_spec we had before. */ 1528 obstack_grow (&obstack, LINK_BUILDID_SPEC, sizeof(LINK_BUILDID_SPEC) - 1); 1529 # endif 1530 # ifdef LINK_EH_SPEC 1531 /* Prepend LINK_EH_SPEC to whatever link_spec we had before. */ 1532 obstack_grow (&obstack, LINK_EH_SPEC, sizeof(LINK_EH_SPEC) - 1); 1533 # endif 1534 # ifdef LINKER_HASH_STYLE 1535 /* Prepend --hash-style=LINKER_HASH_STYLE to whatever link_spec we had 1536 before. */ 1537 { 1538 static const char hash_style[] = "--hash-style="; 1539 obstack_grow (&obstack, hash_style, sizeof(hash_style) - 1); 1540 obstack_grow (&obstack, LINKER_HASH_STYLE, sizeof(LINKER_HASH_STYLE) - 1); 1541 obstack_1grow (&obstack, ' '); 1542 } 1543 # endif 1544 obstack_grow0 (&obstack, link_spec, strlen (link_spec)); 1545 link_spec = XOBFINISH (&obstack, const char *); 1546 #endif 1547 1548 specs = sl; 1549 } 1550 1551 /* Change the value of spec NAME to SPEC. If SPEC is empty, then the spec is 1552 removed; If the spec starts with a + then SPEC is added to the end of the 1553 current spec. */ 1554 1555 static void 1556 set_spec (const char *name, const char *spec, bool user_p) 1557 { 1558 struct spec_list *sl; 1559 const char *old_spec; 1560 int name_len = strlen (name); 1561 int i; 1562 1563 /* If this is the first call, initialize the statically allocated specs. */ 1564 if (!specs) 1565 { 1566 struct spec_list *next = (struct spec_list *) 0; 1567 for (i = ARRAY_SIZE (static_specs) - 1; i >= 0; i--) 1568 { 1569 sl = &static_specs[i]; 1570 sl->next = next; 1571 next = sl; 1572 } 1573 specs = sl; 1574 } 1575 1576 /* See if the spec already exists. */ 1577 for (sl = specs; sl; sl = sl->next) 1578 if (name_len == sl->name_len && !strcmp (sl->name, name)) 1579 break; 1580 1581 if (!sl) 1582 { 1583 /* Not found - make it. */ 1584 sl = XNEW (struct spec_list); 1585 sl->name = xstrdup (name); 1586 sl->name_len = name_len; 1587 sl->ptr_spec = &sl->ptr; 1588 sl->alloc_p = 0; 1589 *(sl->ptr_spec) = ""; 1590 sl->next = specs; 1591 specs = sl; 1592 } 1593 1594 old_spec = *(sl->ptr_spec); 1595 *(sl->ptr_spec) = ((spec[0] == '+' && ISSPACE ((unsigned char)spec[1])) 1596 ? concat (old_spec, spec + 1, NULL) 1597 : xstrdup (spec)); 1598 1599 #ifdef DEBUG_SPECS 1600 if (verbose_flag) 1601 fnotice (stderr, "Setting spec %s to '%s'\n\n", name, *(sl->ptr_spec)); 1602 #endif 1603 1604 /* Free the old spec. */ 1605 if (old_spec && sl->alloc_p) 1606 free (CONST_CAST(char *, old_spec)); 1607 1608 sl->user_p = user_p; 1609 sl->alloc_p = true; 1610 } 1611 1612 /* Accumulate a command (program name and args), and run it. */ 1613 1614 typedef const char *const_char_p; /* For DEF_VEC_P. */ 1615 1616 /* Vector of pointers to arguments in the current line of specifications. */ 1617 1618 static vec<const_char_p> argbuf; 1619 1620 /* Position in the argbuf vector containing the name of the output file 1621 (the value associated with the "-o" flag). */ 1622 1623 static int have_o_argbuf_index = 0; 1624 1625 /* Were the options -c, -S or -E passed. */ 1626 static int have_c = 0; 1627 1628 /* Was the option -o passed. */ 1629 static int have_o = 0; 1630 1631 /* This is the list of suffixes and codes (%g/%u/%U/%j) and the associated 1632 temp file. If the HOST_BIT_BUCKET is used for %j, no entry is made for 1633 it here. */ 1634 1635 static struct temp_name { 1636 const char *suffix; /* suffix associated with the code. */ 1637 int length; /* strlen (suffix). */ 1638 int unique; /* Indicates whether %g or %u/%U was used. */ 1639 const char *filename; /* associated filename. */ 1640 int filename_length; /* strlen (filename). */ 1641 struct temp_name *next; 1642 } *temp_names; 1643 1644 /* Number of commands executed so far. */ 1645 1646 static int execution_count; 1647 1648 /* Number of commands that exited with a signal. */ 1649 1650 static int signal_count; 1651 1652 /* Allocate the argument vector. */ 1653 1654 static void 1655 alloc_args (void) 1656 { 1657 argbuf.create (10); 1658 } 1659 1660 /* Clear out the vector of arguments (after a command is executed). */ 1661 1662 static void 1663 clear_args (void) 1664 { 1665 argbuf.truncate (0); 1666 } 1667 1668 /* Add one argument to the vector at the end. 1669 This is done when a space is seen or at the end of the line. 1670 If DELETE_ALWAYS is nonzero, the arg is a filename 1671 and the file should be deleted eventually. 1672 If DELETE_FAILURE is nonzero, the arg is a filename 1673 and the file should be deleted if this compilation fails. */ 1674 1675 static void 1676 store_arg (const char *arg, int delete_always, int delete_failure) 1677 { 1678 argbuf.safe_push (arg); 1679 1680 if (strcmp (arg, "-o") == 0) 1681 have_o_argbuf_index = argbuf.length (); 1682 if (delete_always || delete_failure) 1683 { 1684 const char *p; 1685 /* If the temporary file we should delete is specified as 1686 part of a joined argument extract the filename. */ 1687 if (arg[0] == '-' 1688 && (p = strrchr (arg, '='))) 1689 arg = p + 1; 1690 record_temp_file (arg, delete_always, delete_failure); 1691 } 1692 } 1693 1694 /* Load specs from a file name named FILENAME, replacing occurrences of 1695 various different types of line-endings, \r\n, \n\r and just \r, with 1696 a single \n. */ 1697 1698 static char * 1699 load_specs (const char *filename) 1700 { 1701 int desc; 1702 int readlen; 1703 struct stat statbuf; 1704 char *buffer; 1705 char *buffer_p; 1706 char *specs; 1707 char *specs_p; 1708 1709 if (verbose_flag) 1710 fnotice (stderr, "Reading specs from %s\n", filename); 1711 1712 /* Open and stat the file. */ 1713 desc = open (filename, O_RDONLY, 0); 1714 if (desc < 0) 1715 pfatal_with_name (filename); 1716 if (stat (filename, &statbuf) < 0) 1717 pfatal_with_name (filename); 1718 1719 /* Read contents of file into BUFFER. */ 1720 buffer = XNEWVEC (char, statbuf.st_size + 1); 1721 readlen = read (desc, buffer, (unsigned) statbuf.st_size); 1722 if (readlen < 0) 1723 pfatal_with_name (filename); 1724 buffer[readlen] = 0; 1725 close (desc); 1726 1727 specs = XNEWVEC (char, readlen + 1); 1728 specs_p = specs; 1729 for (buffer_p = buffer; buffer_p && *buffer_p; buffer_p++) 1730 { 1731 int skip = 0; 1732 char c = *buffer_p; 1733 if (c == '\r') 1734 { 1735 if (buffer_p > buffer && *(buffer_p - 1) == '\n') /* \n\r */ 1736 skip = 1; 1737 else if (*(buffer_p + 1) == '\n') /* \r\n */ 1738 skip = 1; 1739 else /* \r */ 1740 c = '\n'; 1741 } 1742 if (! skip) 1743 *specs_p++ = c; 1744 } 1745 *specs_p = '\0'; 1746 1747 free (buffer); 1748 return (specs); 1749 } 1750 1751 /* Read compilation specs from a file named FILENAME, 1752 replacing the default ones. 1753 1754 A suffix which starts with `*' is a definition for 1755 one of the machine-specific sub-specs. The "suffix" should be 1756 *asm, *cc1, *cpp, *link, *startfile, etc. 1757 The corresponding spec is stored in asm_spec, etc., 1758 rather than in the `compilers' vector. 1759 1760 Anything invalid in the file is a fatal error. */ 1761 1762 static void 1763 read_specs (const char *filename, bool main_p, bool user_p) 1764 { 1765 char *buffer; 1766 char *p; 1767 1768 buffer = load_specs (filename); 1769 1770 /* Scan BUFFER for specs, putting them in the vector. */ 1771 p = buffer; 1772 while (1) 1773 { 1774 char *suffix; 1775 char *spec; 1776 char *in, *out, *p1, *p2, *p3; 1777 1778 /* Advance P in BUFFER to the next nonblank nocomment line. */ 1779 p = skip_whitespace (p); 1780 if (*p == 0) 1781 break; 1782 1783 /* Is this a special command that starts with '%'? */ 1784 /* Don't allow this for the main specs file, since it would 1785 encourage people to overwrite it. */ 1786 if (*p == '%' && !main_p) 1787 { 1788 p1 = p; 1789 while (*p && *p != '\n') 1790 p++; 1791 1792 /* Skip '\n'. */ 1793 p++; 1794 1795 if (!strncmp (p1, "%include", sizeof ("%include") - 1) 1796 && (p1[sizeof "%include" - 1] == ' ' 1797 || p1[sizeof "%include" - 1] == '\t')) 1798 { 1799 char *new_filename; 1800 1801 p1 += sizeof ("%include"); 1802 while (*p1 == ' ' || *p1 == '\t') 1803 p1++; 1804 1805 if (*p1++ != '<' || p[-2] != '>') 1806 fatal_error ("specs %%include syntax malformed after " 1807 "%ld characters", 1808 (long) (p1 - buffer + 1)); 1809 1810 p[-2] = '\0'; 1811 new_filename = find_a_file (&startfile_prefixes, p1, R_OK, true); 1812 read_specs (new_filename ? new_filename : p1, false, user_p); 1813 continue; 1814 } 1815 else if (!strncmp (p1, "%include_noerr", sizeof "%include_noerr" - 1) 1816 && (p1[sizeof "%include_noerr" - 1] == ' ' 1817 || p1[sizeof "%include_noerr" - 1] == '\t')) 1818 { 1819 char *new_filename; 1820 1821 p1 += sizeof "%include_noerr"; 1822 while (*p1 == ' ' || *p1 == '\t') 1823 p1++; 1824 1825 if (*p1++ != '<' || p[-2] != '>') 1826 fatal_error ("specs %%include syntax malformed after " 1827 "%ld characters", 1828 (long) (p1 - buffer + 1)); 1829 1830 p[-2] = '\0'; 1831 new_filename = find_a_file (&startfile_prefixes, p1, R_OK, true); 1832 if (new_filename) 1833 read_specs (new_filename, false, user_p); 1834 else if (verbose_flag) 1835 fnotice (stderr, "could not find specs file %s\n", p1); 1836 continue; 1837 } 1838 else if (!strncmp (p1, "%rename", sizeof "%rename" - 1) 1839 && (p1[sizeof "%rename" - 1] == ' ' 1840 || p1[sizeof "%rename" - 1] == '\t')) 1841 { 1842 int name_len; 1843 struct spec_list *sl; 1844 struct spec_list *newsl; 1845 1846 /* Get original name. */ 1847 p1 += sizeof "%rename"; 1848 while (*p1 == ' ' || *p1 == '\t') 1849 p1++; 1850 1851 if (! ISALPHA ((unsigned char) *p1)) 1852 fatal_error ("specs %%rename syntax malformed after " 1853 "%ld characters", 1854 (long) (p1 - buffer)); 1855 1856 p2 = p1; 1857 while (*p2 && !ISSPACE ((unsigned char) *p2)) 1858 p2++; 1859 1860 if (*p2 != ' ' && *p2 != '\t') 1861 fatal_error ("specs %%rename syntax malformed after " 1862 "%ld characters", 1863 (long) (p2 - buffer)); 1864 1865 name_len = p2 - p1; 1866 *p2++ = '\0'; 1867 while (*p2 == ' ' || *p2 == '\t') 1868 p2++; 1869 1870 if (! ISALPHA ((unsigned char) *p2)) 1871 fatal_error ("specs %%rename syntax malformed after " 1872 "%ld characters", 1873 (long) (p2 - buffer)); 1874 1875 /* Get new spec name. */ 1876 p3 = p2; 1877 while (*p3 && !ISSPACE ((unsigned char) *p3)) 1878 p3++; 1879 1880 if (p3 != p - 1) 1881 fatal_error ("specs %%rename syntax malformed after " 1882 "%ld characters", 1883 (long) (p3 - buffer)); 1884 *p3 = '\0'; 1885 1886 for (sl = specs; sl; sl = sl->next) 1887 if (name_len == sl->name_len && !strcmp (sl->name, p1)) 1888 break; 1889 1890 if (!sl) 1891 fatal_error ("specs %s spec was not found to be renamed", p1); 1892 1893 if (strcmp (p1, p2) == 0) 1894 continue; 1895 1896 for (newsl = specs; newsl; newsl = newsl->next) 1897 if (strcmp (newsl->name, p2) == 0) 1898 fatal_error ("%s: attempt to rename spec %qs to " 1899 "already defined spec %qs", 1900 filename, p1, p2); 1901 1902 if (verbose_flag) 1903 { 1904 fnotice (stderr, "rename spec %s to %s\n", p1, p2); 1905 #ifdef DEBUG_SPECS 1906 fnotice (stderr, "spec is '%s'\n\n", *(sl->ptr_spec)); 1907 #endif 1908 } 1909 1910 set_spec (p2, *(sl->ptr_spec), user_p); 1911 if (sl->alloc_p) 1912 free (CONST_CAST (char *, *(sl->ptr_spec))); 1913 1914 *(sl->ptr_spec) = ""; 1915 sl->alloc_p = 0; 1916 continue; 1917 } 1918 else 1919 fatal_error ("specs unknown %% command after %ld characters", 1920 (long) (p1 - buffer)); 1921 } 1922 1923 /* Find the colon that should end the suffix. */ 1924 p1 = p; 1925 while (*p1 && *p1 != ':' && *p1 != '\n') 1926 p1++; 1927 1928 /* The colon shouldn't be missing. */ 1929 if (*p1 != ':') 1930 fatal_error ("specs file malformed after %ld characters", 1931 (long) (p1 - buffer)); 1932 1933 /* Skip back over trailing whitespace. */ 1934 p2 = p1; 1935 while (p2 > buffer && (p2[-1] == ' ' || p2[-1] == '\t')) 1936 p2--; 1937 1938 /* Copy the suffix to a string. */ 1939 suffix = save_string (p, p2 - p); 1940 /* Find the next line. */ 1941 p = skip_whitespace (p1 + 1); 1942 if (p[1] == 0) 1943 fatal_error ("specs file malformed after %ld characters", 1944 (long) (p - buffer)); 1945 1946 p1 = p; 1947 /* Find next blank line or end of string. */ 1948 while (*p1 && !(*p1 == '\n' && (p1[1] == '\n' || p1[1] == '\0'))) 1949 p1++; 1950 1951 /* Specs end at the blank line and do not include the newline. */ 1952 spec = save_string (p, p1 - p); 1953 p = p1; 1954 1955 /* Delete backslash-newline sequences from the spec. */ 1956 in = spec; 1957 out = spec; 1958 while (*in != 0) 1959 { 1960 if (in[0] == '\\' && in[1] == '\n') 1961 in += 2; 1962 else if (in[0] == '#') 1963 while (*in && *in != '\n') 1964 in++; 1965 1966 else 1967 *out++ = *in++; 1968 } 1969 *out = 0; 1970 1971 if (suffix[0] == '*') 1972 { 1973 if (! strcmp (suffix, "*link_command")) 1974 link_command_spec = spec; 1975 else 1976 set_spec (suffix + 1, spec, user_p); 1977 } 1978 else 1979 { 1980 /* Add this pair to the vector. */ 1981 compilers 1982 = XRESIZEVEC (struct compiler, compilers, n_compilers + 2); 1983 1984 compilers[n_compilers].suffix = suffix; 1985 compilers[n_compilers].spec = spec; 1986 n_compilers++; 1987 memset (&compilers[n_compilers], 0, sizeof compilers[n_compilers]); 1988 } 1989 1990 if (*suffix == 0) 1991 link_command_spec = spec; 1992 } 1993 1994 if (link_command_spec == 0) 1995 fatal_error ("spec file has no spec for linking"); 1996 } 1997 1998 /* Record the names of temporary files we tell compilers to write, 1999 and delete them at the end of the run. */ 2000 2001 /* This is the common prefix we use to make temp file names. 2002 It is chosen once for each run of this program. 2003 It is substituted into a spec by %g or %j. 2004 Thus, all temp file names contain this prefix. 2005 In practice, all temp file names start with this prefix. 2006 2007 This prefix comes from the envvar TMPDIR if it is defined; 2008 otherwise, from the P_tmpdir macro if that is defined; 2009 otherwise, in /usr/tmp or /tmp; 2010 or finally the current directory if all else fails. */ 2011 2012 static const char *temp_filename; 2013 2014 /* Length of the prefix. */ 2015 2016 static int temp_filename_length; 2017 2018 /* Define the list of temporary files to delete. */ 2019 2020 struct temp_file 2021 { 2022 const char *name; 2023 struct temp_file *next; 2024 }; 2025 2026 /* Queue of files to delete on success or failure of compilation. */ 2027 static struct temp_file *always_delete_queue; 2028 /* Queue of files to delete on failure of compilation. */ 2029 static struct temp_file *failure_delete_queue; 2030 2031 /* Record FILENAME as a file to be deleted automatically. 2032 ALWAYS_DELETE nonzero means delete it if all compilation succeeds; 2033 otherwise delete it in any case. 2034 FAIL_DELETE nonzero means delete it if a compilation step fails; 2035 otherwise delete it in any case. */ 2036 2037 void 2038 record_temp_file (const char *filename, int always_delete, int fail_delete) 2039 { 2040 char *const name = xstrdup (filename); 2041 2042 if (always_delete) 2043 { 2044 struct temp_file *temp; 2045 for (temp = always_delete_queue; temp; temp = temp->next) 2046 if (! filename_cmp (name, temp->name)) 2047 goto already1; 2048 2049 temp = XNEW (struct temp_file); 2050 temp->next = always_delete_queue; 2051 temp->name = name; 2052 always_delete_queue = temp; 2053 2054 already1:; 2055 } 2056 2057 if (fail_delete) 2058 { 2059 struct temp_file *temp; 2060 for (temp = failure_delete_queue; temp; temp = temp->next) 2061 if (! filename_cmp (name, temp->name)) 2062 { 2063 free (name); 2064 goto already2; 2065 } 2066 2067 temp = XNEW (struct temp_file); 2068 temp->next = failure_delete_queue; 2069 temp->name = name; 2070 failure_delete_queue = temp; 2071 2072 already2:; 2073 } 2074 } 2075 2076 /* Delete all the temporary files whose names we previously recorded. */ 2077 2078 #ifndef DELETE_IF_ORDINARY 2079 #define DELETE_IF_ORDINARY(NAME,ST,VERBOSE_FLAG) \ 2080 do \ 2081 { \ 2082 if (stat (NAME, &ST) >= 0 && S_ISREG (ST.st_mode)) \ 2083 if (unlink (NAME) < 0) \ 2084 if (VERBOSE_FLAG) \ 2085 perror_with_name (NAME); \ 2086 } while (0) 2087 #endif 2088 2089 static void 2090 delete_if_ordinary (const char *name) 2091 { 2092 struct stat st; 2093 #ifdef DEBUG 2094 int i, c; 2095 2096 printf ("Delete %s? (y or n) ", name); 2097 fflush (stdout); 2098 i = getchar (); 2099 if (i != '\n') 2100 while ((c = getchar ()) != '\n' && c != EOF) 2101 ; 2102 2103 if (i == 'y' || i == 'Y') 2104 #endif /* DEBUG */ 2105 DELETE_IF_ORDINARY (name, st, verbose_flag); 2106 } 2107 2108 static void 2109 delete_temp_files (void) 2110 { 2111 struct temp_file *temp; 2112 2113 for (temp = always_delete_queue; temp; temp = temp->next) 2114 delete_if_ordinary (temp->name); 2115 always_delete_queue = 0; 2116 } 2117 2118 /* Delete all the files to be deleted on error. */ 2119 2120 static void 2121 delete_failure_queue (void) 2122 { 2123 struct temp_file *temp; 2124 2125 for (temp = failure_delete_queue; temp; temp = temp->next) 2126 delete_if_ordinary (temp->name); 2127 } 2128 2129 static void 2130 clear_failure_queue (void) 2131 { 2132 failure_delete_queue = 0; 2133 } 2134 2135 /* Call CALLBACK for each path in PATHS, breaking out early if CALLBACK 2136 returns non-NULL. 2137 If DO_MULTI is true iterate over the paths twice, first with multilib 2138 suffix then without, otherwise iterate over the paths once without 2139 adding a multilib suffix. When DO_MULTI is true, some attempt is made 2140 to avoid visiting the same path twice, but we could do better. For 2141 instance, /usr/lib/../lib is considered different from /usr/lib. 2142 At least EXTRA_SPACE chars past the end of the path passed to 2143 CALLBACK are available for use by the callback. 2144 CALLBACK_INFO allows extra parameters to be passed to CALLBACK. 2145 2146 Returns the value returned by CALLBACK. */ 2147 2148 static void * 2149 for_each_path (const struct path_prefix *paths, 2150 bool do_multi, 2151 size_t extra_space, 2152 void *(*callback) (char *, void *), 2153 void *callback_info) 2154 { 2155 struct prefix_list *pl; 2156 const char *multi_dir = NULL; 2157 const char *multi_os_dir = NULL; 2158 const char *multiarch_suffix = NULL; 2159 const char *multi_suffix; 2160 const char *just_multi_suffix; 2161 char *path = NULL; 2162 void *ret = NULL; 2163 bool skip_multi_dir = false; 2164 bool skip_multi_os_dir = false; 2165 2166 multi_suffix = machine_suffix; 2167 just_multi_suffix = just_machine_suffix; 2168 if (do_multi && multilib_dir && strcmp (multilib_dir, ".") != 0) 2169 { 2170 multi_dir = concat (multilib_dir, dir_separator_str, NULL); 2171 multi_suffix = concat (multi_suffix, multi_dir, NULL); 2172 just_multi_suffix = concat (just_multi_suffix, multi_dir, NULL); 2173 } 2174 if (do_multi && multilib_os_dir && strcmp (multilib_os_dir, ".") != 0) 2175 multi_os_dir = concat (multilib_os_dir, dir_separator_str, NULL); 2176 if (multiarch_dir) 2177 multiarch_suffix = concat (multiarch_dir, dir_separator_str, NULL); 2178 2179 while (1) 2180 { 2181 size_t multi_dir_len = 0; 2182 size_t multi_os_dir_len = 0; 2183 size_t multiarch_len = 0; 2184 size_t suffix_len; 2185 size_t just_suffix_len; 2186 size_t len; 2187 2188 if (multi_dir) 2189 multi_dir_len = strlen (multi_dir); 2190 if (multi_os_dir) 2191 multi_os_dir_len = strlen (multi_os_dir); 2192 if (multiarch_suffix) 2193 multiarch_len = strlen (multiarch_suffix); 2194 suffix_len = strlen (multi_suffix); 2195 just_suffix_len = strlen (just_multi_suffix); 2196 2197 if (path == NULL) 2198 { 2199 len = paths->max_len + extra_space + 1; 2200 len += MAX (MAX (suffix_len, multi_os_dir_len), multiarch_len); 2201 path = XNEWVEC (char, len); 2202 } 2203 2204 for (pl = paths->plist; pl != 0; pl = pl->next) 2205 { 2206 len = strlen (pl->prefix); 2207 memcpy (path, pl->prefix, len); 2208 2209 /* Look first in MACHINE/VERSION subdirectory. */ 2210 if (!skip_multi_dir) 2211 { 2212 memcpy (path + len, multi_suffix, suffix_len + 1); 2213 ret = callback (path, callback_info); 2214 if (ret) 2215 break; 2216 } 2217 2218 /* Some paths are tried with just the machine (ie. target) 2219 subdir. This is used for finding as, ld, etc. */ 2220 if (!skip_multi_dir 2221 && pl->require_machine_suffix == 2) 2222 { 2223 memcpy (path + len, just_multi_suffix, just_suffix_len + 1); 2224 ret = callback (path, callback_info); 2225 if (ret) 2226 break; 2227 } 2228 2229 /* Now try the multiarch path. */ 2230 if (!skip_multi_dir 2231 && !pl->require_machine_suffix && multiarch_dir) 2232 { 2233 memcpy (path + len, multiarch_suffix, multiarch_len + 1); 2234 ret = callback (path, callback_info); 2235 if (ret) 2236 break; 2237 } 2238 2239 /* Now try the base path. */ 2240 if (!pl->require_machine_suffix 2241 && !(pl->os_multilib ? skip_multi_os_dir : skip_multi_dir)) 2242 { 2243 const char *this_multi; 2244 size_t this_multi_len; 2245 2246 if (pl->os_multilib) 2247 { 2248 this_multi = multi_os_dir; 2249 this_multi_len = multi_os_dir_len; 2250 } 2251 else 2252 { 2253 this_multi = multi_dir; 2254 this_multi_len = multi_dir_len; 2255 } 2256 2257 if (this_multi_len) 2258 memcpy (path + len, this_multi, this_multi_len + 1); 2259 else 2260 path[len] = '\0'; 2261 2262 ret = callback (path, callback_info); 2263 if (ret) 2264 break; 2265 } 2266 } 2267 if (pl) 2268 break; 2269 2270 if (multi_dir == NULL && multi_os_dir == NULL) 2271 break; 2272 2273 /* Run through the paths again, this time without multilibs. 2274 Don't repeat any we have already seen. */ 2275 if (multi_dir) 2276 { 2277 free (CONST_CAST (char *, multi_dir)); 2278 multi_dir = NULL; 2279 free (CONST_CAST (char *, multi_suffix)); 2280 multi_suffix = machine_suffix; 2281 free (CONST_CAST (char *, just_multi_suffix)); 2282 just_multi_suffix = just_machine_suffix; 2283 } 2284 else 2285 skip_multi_dir = true; 2286 if (multi_os_dir) 2287 { 2288 free (CONST_CAST (char *, multi_os_dir)); 2289 multi_os_dir = NULL; 2290 } 2291 else 2292 skip_multi_os_dir = true; 2293 } 2294 2295 if (multi_dir) 2296 { 2297 free (CONST_CAST (char *, multi_dir)); 2298 free (CONST_CAST (char *, multi_suffix)); 2299 free (CONST_CAST (char *, just_multi_suffix)); 2300 } 2301 if (multi_os_dir) 2302 free (CONST_CAST (char *, multi_os_dir)); 2303 if (ret != path) 2304 free (path); 2305 return ret; 2306 } 2307 2308 /* Callback for build_search_list. Adds path to obstack being built. */ 2309 2310 struct add_to_obstack_info { 2311 struct obstack *ob; 2312 bool check_dir; 2313 bool first_time; 2314 }; 2315 2316 static void * 2317 add_to_obstack (char *path, void *data) 2318 { 2319 struct add_to_obstack_info *info = (struct add_to_obstack_info *) data; 2320 2321 if (info->check_dir && !is_directory (path, false)) 2322 return NULL; 2323 2324 if (!info->first_time) 2325 obstack_1grow (info->ob, PATH_SEPARATOR); 2326 2327 obstack_grow (info->ob, path, strlen (path)); 2328 2329 info->first_time = false; 2330 return NULL; 2331 } 2332 2333 /* Add or change the value of an environment variable, outputting the 2334 change to standard error if in verbose mode. */ 2335 static void 2336 xputenv (const char *string) 2337 { 2338 if (verbose_flag) 2339 fnotice (stderr, "%s\n", string); 2340 putenv (CONST_CAST (char *, string)); 2341 } 2342 2343 /* Build a list of search directories from PATHS. 2344 PREFIX is a string to prepend to the list. 2345 If CHECK_DIR_P is true we ensure the directory exists. 2346 If DO_MULTI is true, multilib paths are output first, then 2347 non-multilib paths. 2348 This is used mostly by putenv_from_prefixes so we use `collect_obstack'. 2349 It is also used by the --print-search-dirs flag. */ 2350 2351 static char * 2352 build_search_list (const struct path_prefix *paths, const char *prefix, 2353 bool check_dir, bool do_multi) 2354 { 2355 struct add_to_obstack_info info; 2356 2357 info.ob = &collect_obstack; 2358 info.check_dir = check_dir; 2359 info.first_time = true; 2360 2361 obstack_grow (&collect_obstack, prefix, strlen (prefix)); 2362 obstack_1grow (&collect_obstack, '='); 2363 2364 for_each_path (paths, do_multi, 0, add_to_obstack, &info); 2365 2366 obstack_1grow (&collect_obstack, '\0'); 2367 return XOBFINISH (&collect_obstack, char *); 2368 } 2369 2370 /* Rebuild the COMPILER_PATH and LIBRARY_PATH environment variables 2371 for collect. */ 2372 2373 static void 2374 putenv_from_prefixes (const struct path_prefix *paths, const char *env_var, 2375 bool do_multi) 2376 { 2377 xputenv (build_search_list (paths, env_var, true, do_multi)); 2378 } 2379 2380 /* Check whether NAME can be accessed in MODE. This is like access, 2381 except that it never considers directories to be executable. */ 2382 2383 static int 2384 access_check (const char *name, int mode) 2385 { 2386 if (mode == X_OK) 2387 { 2388 struct stat st; 2389 2390 if (stat (name, &st) < 0 2391 || S_ISDIR (st.st_mode)) 2392 return -1; 2393 } 2394 2395 return access (name, mode); 2396 } 2397 2398 /* Callback for find_a_file. Appends the file name to the directory 2399 path. If the resulting file exists in the right mode, return the 2400 full pathname to the file. */ 2401 2402 struct file_at_path_info { 2403 const char *name; 2404 const char *suffix; 2405 int name_len; 2406 int suffix_len; 2407 int mode; 2408 }; 2409 2410 static void * 2411 file_at_path (char *path, void *data) 2412 { 2413 struct file_at_path_info *info = (struct file_at_path_info *) data; 2414 size_t len = strlen (path); 2415 2416 memcpy (path + len, info->name, info->name_len); 2417 len += info->name_len; 2418 2419 /* Some systems have a suffix for executable files. 2420 So try appending that first. */ 2421 if (info->suffix_len) 2422 { 2423 memcpy (path + len, info->suffix, info->suffix_len + 1); 2424 if (access_check (path, info->mode) == 0) 2425 return path; 2426 } 2427 2428 path[len] = '\0'; 2429 if (access_check (path, info->mode) == 0) 2430 return path; 2431 2432 return NULL; 2433 } 2434 2435 /* Search for NAME using the prefix list PREFIXES. MODE is passed to 2436 access to check permissions. If DO_MULTI is true, search multilib 2437 paths then non-multilib paths, otherwise do not search multilib paths. 2438 Return 0 if not found, otherwise return its name, allocated with malloc. */ 2439 2440 static char * 2441 find_a_file (const struct path_prefix *pprefix, const char *name, int mode, 2442 bool do_multi) 2443 { 2444 struct file_at_path_info info; 2445 2446 #ifdef DEFAULT_ASSEMBLER 2447 if (! strcmp (name, "as") && access (DEFAULT_ASSEMBLER, mode) == 0) 2448 return xstrdup (DEFAULT_ASSEMBLER); 2449 #endif 2450 2451 #ifdef DEFAULT_LINKER 2452 if (! strcmp(name, "ld") && access (DEFAULT_LINKER, mode) == 0) 2453 return xstrdup (DEFAULT_LINKER); 2454 #endif 2455 2456 /* Determine the filename to execute (special case for absolute paths). */ 2457 2458 if (IS_ABSOLUTE_PATH (name)) 2459 { 2460 if (access (name, mode) == 0) 2461 return xstrdup (name); 2462 2463 return NULL; 2464 } 2465 2466 info.name = name; 2467 info.suffix = (mode & X_OK) != 0 ? HOST_EXECUTABLE_SUFFIX : ""; 2468 info.name_len = strlen (info.name); 2469 info.suffix_len = strlen (info.suffix); 2470 info.mode = mode; 2471 2472 return (char*) for_each_path (pprefix, do_multi, 2473 info.name_len + info.suffix_len, 2474 file_at_path, &info); 2475 } 2476 2477 /* Ranking of prefixes in the sort list. -B prefixes are put before 2478 all others. */ 2479 2480 enum path_prefix_priority 2481 { 2482 PREFIX_PRIORITY_B_OPT, 2483 PREFIX_PRIORITY_LAST 2484 }; 2485 2486 /* Add an entry for PREFIX in PLIST. The PLIST is kept in ascending 2487 order according to PRIORITY. Within each PRIORITY, new entries are 2488 appended. 2489 2490 If WARN is nonzero, we will warn if no file is found 2491 through this prefix. WARN should point to an int 2492 which will be set to 1 if this entry is used. 2493 2494 COMPONENT is the value to be passed to update_path. 2495 2496 REQUIRE_MACHINE_SUFFIX is 1 if this prefix can't be used without 2497 the complete value of machine_suffix. 2498 2 means try both machine_suffix and just_machine_suffix. */ 2499 2500 static void 2501 add_prefix (struct path_prefix *pprefix, const char *prefix, 2502 const char *component, /* enum prefix_priority */ int priority, 2503 int require_machine_suffix, int os_multilib) 2504 { 2505 struct prefix_list *pl, **prev; 2506 int len; 2507 2508 for (prev = &pprefix->plist; 2509 (*prev) != NULL && (*prev)->priority <= priority; 2510 prev = &(*prev)->next) 2511 ; 2512 2513 /* Keep track of the longest prefix. */ 2514 2515 prefix = update_path (prefix, component); 2516 len = strlen (prefix); 2517 if (len > pprefix->max_len) 2518 pprefix->max_len = len; 2519 2520 pl = XNEW (struct prefix_list); 2521 pl->prefix = prefix; 2522 pl->require_machine_suffix = require_machine_suffix; 2523 pl->priority = priority; 2524 pl->os_multilib = os_multilib; 2525 2526 /* Insert after PREV. */ 2527 pl->next = (*prev); 2528 (*prev) = pl; 2529 } 2530 2531 /* Same as add_prefix, but prepending target_system_root to prefix. */ 2532 /* The target_system_root prefix has been relocated by gcc_exec_prefix. */ 2533 static void 2534 add_sysrooted_prefix (struct path_prefix *pprefix, const char *prefix, 2535 const char *component, 2536 /* enum prefix_priority */ int priority, 2537 int require_machine_suffix, int os_multilib) 2538 { 2539 if (!IS_ABSOLUTE_PATH (prefix)) 2540 fatal_error ("system path %qs is not absolute", prefix); 2541 2542 if (target_system_root) 2543 { 2544 char *sysroot_no_trailing_dir_separator = xstrdup (target_system_root); 2545 size_t sysroot_len = strlen (target_system_root); 2546 2547 if (sysroot_len > 0 2548 && target_system_root[sysroot_len - 1] == DIR_SEPARATOR) 2549 sysroot_no_trailing_dir_separator[sysroot_len - 1] = '\0'; 2550 2551 if (target_sysroot_suffix) 2552 prefix = concat (sysroot_no_trailing_dir_separator, 2553 target_sysroot_suffix, prefix, NULL); 2554 else 2555 prefix = concat (sysroot_no_trailing_dir_separator, prefix, NULL); 2556 2557 free (sysroot_no_trailing_dir_separator); 2558 2559 /* We have to override this because GCC's notion of sysroot 2560 moves along with GCC. */ 2561 component = "GCC"; 2562 } 2563 2564 add_prefix (pprefix, prefix, component, priority, 2565 require_machine_suffix, os_multilib); 2566 } 2567 2568 /* Execute the command specified by the arguments on the current line of spec. 2569 When using pipes, this includes several piped-together commands 2570 with `|' between them. 2571 2572 Return 0 if successful, -1 if failed. */ 2573 2574 static int 2575 execute (void) 2576 { 2577 int i; 2578 int n_commands; /* # of command. */ 2579 char *string; 2580 struct pex_obj *pex; 2581 struct command 2582 { 2583 const char *prog; /* program name. */ 2584 const char **argv; /* vector of args. */ 2585 }; 2586 const char *arg; 2587 2588 struct command *commands; /* each command buffer with above info. */ 2589 2590 gcc_assert (!processing_spec_function); 2591 2592 if (wrapper_string) 2593 { 2594 string = find_a_file (&exec_prefixes, 2595 argbuf[0], X_OK, false); 2596 if (string) 2597 argbuf[0] = string; 2598 insert_wrapper (wrapper_string); 2599 } 2600 2601 /* Count # of piped commands. */ 2602 for (n_commands = 1, i = 0; argbuf.iterate (i, &arg); i++) 2603 if (strcmp (arg, "|") == 0) 2604 n_commands++; 2605 2606 /* Get storage for each command. */ 2607 commands = (struct command *) alloca (n_commands * sizeof (struct command)); 2608 2609 /* Split argbuf into its separate piped processes, 2610 and record info about each one. 2611 Also search for the programs that are to be run. */ 2612 2613 argbuf.safe_push (0); 2614 2615 commands[0].prog = argbuf[0]; /* first command. */ 2616 commands[0].argv = argbuf.address (); 2617 2618 if (!wrapper_string) 2619 { 2620 string = find_a_file (&exec_prefixes, commands[0].prog, X_OK, false); 2621 commands[0].argv[0] = (string) ? string : commands[0].argv[0]; 2622 } 2623 2624 for (n_commands = 1, i = 0; argbuf.iterate (i, &arg); i++) 2625 if (arg && strcmp (arg, "|") == 0) 2626 { /* each command. */ 2627 #if defined (__MSDOS__) || defined (OS2) || defined (VMS) 2628 fatal_error ("-pipe not supported"); 2629 #endif 2630 argbuf[i] = 0; /* Termination of 2631 command args. */ 2632 commands[n_commands].prog = argbuf[i + 1]; 2633 commands[n_commands].argv 2634 = &(argbuf.address ())[i + 1]; 2635 string = find_a_file (&exec_prefixes, commands[n_commands].prog, 2636 X_OK, false); 2637 if (string) 2638 commands[n_commands].argv[0] = string; 2639 n_commands++; 2640 } 2641 2642 /* If -v, print what we are about to do, and maybe query. */ 2643 2644 if (verbose_flag) 2645 { 2646 /* For help listings, put a blank line between sub-processes. */ 2647 if (print_help_list) 2648 fputc ('\n', stderr); 2649 2650 /* Print each piped command as a separate line. */ 2651 for (i = 0; i < n_commands; i++) 2652 { 2653 const char *const *j; 2654 2655 if (verbose_only_flag) 2656 { 2657 for (j = commands[i].argv; *j; j++) 2658 { 2659 const char *p; 2660 for (p = *j; *p; ++p) 2661 if (!ISALNUM ((unsigned char) *p) 2662 && *p != '_' && *p != '/' && *p != '-' && *p != '.') 2663 break; 2664 if (*p || !*j) 2665 { 2666 fprintf (stderr, " \""); 2667 for (p = *j; *p; ++p) 2668 { 2669 if (*p == '"' || *p == '\\' || *p == '$') 2670 fputc ('\\', stderr); 2671 fputc (*p, stderr); 2672 } 2673 fputc ('"', stderr); 2674 } 2675 /* If it's empty, print "". */ 2676 else if (!**j) 2677 fprintf (stderr, " \"\""); 2678 else 2679 fprintf (stderr, " %s", *j); 2680 } 2681 } 2682 else 2683 for (j = commands[i].argv; *j; j++) 2684 /* If it's empty, print "". */ 2685 if (!**j) 2686 fprintf (stderr, " \"\""); 2687 else 2688 fprintf (stderr, " %s", *j); 2689 2690 /* Print a pipe symbol after all but the last command. */ 2691 if (i + 1 != n_commands) 2692 fprintf (stderr, " |"); 2693 fprintf (stderr, "\n"); 2694 } 2695 fflush (stderr); 2696 if (verbose_only_flag != 0) 2697 { 2698 /* verbose_only_flag should act as if the spec was 2699 executed, so increment execution_count before 2700 returning. This prevents spurious warnings about 2701 unused linker input files, etc. */ 2702 execution_count++; 2703 return 0; 2704 } 2705 #ifdef DEBUG 2706 fnotice (stderr, "\nGo ahead? (y or n) "); 2707 fflush (stderr); 2708 i = getchar (); 2709 if (i != '\n') 2710 while (getchar () != '\n') 2711 ; 2712 2713 if (i != 'y' && i != 'Y') 2714 return 0; 2715 #endif /* DEBUG */ 2716 } 2717 2718 #ifdef ENABLE_VALGRIND_CHECKING 2719 /* Run the each command through valgrind. To simplify prepending the 2720 path to valgrind and the option "-q" (for quiet operation unless 2721 something triggers), we allocate a separate argv array. */ 2722 2723 for (i = 0; i < n_commands; i++) 2724 { 2725 const char **argv; 2726 int argc; 2727 int j; 2728 2729 for (argc = 0; commands[i].argv[argc] != NULL; argc++) 2730 ; 2731 2732 argv = XALLOCAVEC (const char *, argc + 3); 2733 2734 argv[0] = VALGRIND_PATH; 2735 argv[1] = "-q"; 2736 for (j = 2; j < argc + 2; j++) 2737 argv[j] = commands[i].argv[j - 2]; 2738 argv[j] = NULL; 2739 2740 commands[i].argv = argv; 2741 commands[i].prog = argv[0]; 2742 } 2743 #endif 2744 2745 /* Run each piped subprocess. */ 2746 2747 pex = pex_init (PEX_USE_PIPES | ((report_times || report_times_to_file) 2748 ? PEX_RECORD_TIMES : 0), 2749 progname, temp_filename); 2750 if (pex == NULL) 2751 fatal_error ("pex_init failed: %m"); 2752 2753 for (i = 0; i < n_commands; i++) 2754 { 2755 const char *errmsg; 2756 int err; 2757 const char *string = commands[i].argv[0]; 2758 2759 errmsg = pex_run (pex, 2760 ((i + 1 == n_commands ? PEX_LAST : 0) 2761 | (string == commands[i].prog ? PEX_SEARCH : 0)), 2762 string, CONST_CAST (char **, commands[i].argv), 2763 NULL, NULL, &err); 2764 if (errmsg != NULL) 2765 { 2766 if (err == 0) 2767 fatal_error (errmsg); 2768 else 2769 { 2770 errno = err; 2771 pfatal_with_name (errmsg); 2772 } 2773 } 2774 2775 if (string != commands[i].prog) 2776 free (CONST_CAST (char *, string)); 2777 } 2778 2779 execution_count++; 2780 2781 /* Wait for all the subprocesses to finish. */ 2782 2783 { 2784 int *statuses; 2785 struct pex_time *times = NULL; 2786 int ret_code = 0; 2787 2788 statuses = (int *) alloca (n_commands * sizeof (int)); 2789 if (!pex_get_status (pex, n_commands, statuses)) 2790 fatal_error ("failed to get exit status: %m"); 2791 2792 if (report_times || report_times_to_file) 2793 { 2794 times = (struct pex_time *) alloca (n_commands * sizeof (struct pex_time)); 2795 if (!pex_get_times (pex, n_commands, times)) 2796 fatal_error ("failed to get process times: %m"); 2797 } 2798 2799 pex_free (pex); 2800 2801 for (i = 0; i < n_commands; ++i) 2802 { 2803 int status = statuses[i]; 2804 2805 if (WIFSIGNALED (status)) 2806 { 2807 #ifdef SIGPIPE 2808 /* SIGPIPE is a special case. It happens in -pipe mode 2809 when the compiler dies before the preprocessor is done, 2810 or the assembler dies before the compiler is done. 2811 There's generally been an error already, and this is 2812 just fallout. So don't generate another error unless 2813 we would otherwise have succeeded. */ 2814 if (WTERMSIG (status) == SIGPIPE 2815 && (signal_count || greatest_status >= MIN_FATAL_STATUS)) 2816 { 2817 signal_count++; 2818 ret_code = -1; 2819 } 2820 else 2821 #endif 2822 internal_error ("%s (program %s received signal %d)", 2823 strsignal (WTERMSIG (status)), commands[i].prog, 2824 WTERMSIG (status)); 2825 } 2826 else if (WIFEXITED (status) 2827 && WEXITSTATUS (status) >= MIN_FATAL_STATUS) 2828 { 2829 if (WEXITSTATUS (status) > greatest_status) 2830 greatest_status = WEXITSTATUS (status); 2831 ret_code = -1; 2832 } 2833 2834 if (report_times || report_times_to_file) 2835 { 2836 struct pex_time *pt = ×[i]; 2837 double ut, st; 2838 2839 ut = ((double) pt->user_seconds 2840 + (double) pt->user_microseconds / 1.0e6); 2841 st = ((double) pt->system_seconds 2842 + (double) pt->system_microseconds / 1.0e6); 2843 2844 if (ut + st != 0) 2845 { 2846 if (report_times) 2847 fnotice (stderr, "# %s %.2f %.2f\n", 2848 commands[i].prog, ut, st); 2849 2850 if (report_times_to_file) 2851 { 2852 int c = 0; 2853 const char *const *j; 2854 2855 fprintf (report_times_to_file, "%g %g", ut, st); 2856 2857 for (j = &commands[i].prog; *j; j = &commands[i].argv[++c]) 2858 { 2859 const char *p; 2860 for (p = *j; *p; ++p) 2861 if (*p == '"' || *p == '\\' || *p == '$' 2862 || ISSPACE (*p)) 2863 break; 2864 2865 if (*p) 2866 { 2867 fprintf (report_times_to_file, " \""); 2868 for (p = *j; *p; ++p) 2869 { 2870 if (*p == '"' || *p == '\\' || *p == '$') 2871 fputc ('\\', report_times_to_file); 2872 fputc (*p, report_times_to_file); 2873 } 2874 fputc ('"', report_times_to_file); 2875 } 2876 else 2877 fprintf (report_times_to_file, " %s", *j); 2878 } 2879 2880 fputc ('\n', report_times_to_file); 2881 } 2882 } 2883 } 2884 } 2885 2886 return ret_code; 2887 } 2888 } 2889 2890 /* Find all the switches given to us 2891 and make a vector describing them. 2892 The elements of the vector are strings, one per switch given. 2893 If a switch uses following arguments, then the `part1' field 2894 is the switch itself and the `args' field 2895 is a null-terminated vector containing the following arguments. 2896 Bits in the `live_cond' field are: 2897 SWITCH_LIVE to indicate this switch is true in a conditional spec. 2898 SWITCH_FALSE to indicate this switch is overridden by a later switch. 2899 SWITCH_IGNORE to indicate this switch should be ignored (used in %<S). 2900 SWITCH_IGNORE_PERMANENTLY to indicate this switch should be ignored 2901 in all do_spec calls afterwards. Used for %<S from self specs. 2902 The `validated' field is nonzero if any spec has looked at this switch; 2903 if it remains zero at the end of the run, it must be meaningless. */ 2904 2905 #define SWITCH_LIVE (1 << 0) 2906 #define SWITCH_FALSE (1 << 1) 2907 #define SWITCH_IGNORE (1 << 2) 2908 #define SWITCH_IGNORE_PERMANENTLY (1 << 3) 2909 #define SWITCH_KEEP_FOR_GCC (1 << 4) 2910 2911 struct switchstr 2912 { 2913 const char *part1; 2914 const char **args; 2915 unsigned int live_cond; 2916 bool known; 2917 bool validated; 2918 bool ordering; 2919 }; 2920 2921 static struct switchstr *switches; 2922 2923 static int n_switches; 2924 2925 static int n_switches_alloc; 2926 2927 /* Set to zero if -fcompare-debug is disabled, positive if it's 2928 enabled and we're running the first compilation, negative if it's 2929 enabled and we're running the second compilation. For most of the 2930 time, it's in the range -1..1, but it can be temporarily set to 2 2931 or 3 to indicate that the -fcompare-debug flags didn't come from 2932 the command-line, but rather from the GCC_COMPARE_DEBUG environment 2933 variable, until a synthesized -fcompare-debug flag is added to the 2934 command line. */ 2935 int compare_debug; 2936 2937 /* Set to nonzero if we've seen the -fcompare-debug-second flag. */ 2938 int compare_debug_second; 2939 2940 /* Set to the flags that should be passed to the second compilation in 2941 a -fcompare-debug compilation. */ 2942 const char *compare_debug_opt; 2943 2944 static struct switchstr *switches_debug_check[2]; 2945 2946 static int n_switches_debug_check[2]; 2947 2948 static int n_switches_alloc_debug_check[2]; 2949 2950 static char *debug_check_temp_file[2]; 2951 2952 /* Language is one of three things: 2953 2954 1) The name of a real programming language. 2955 2) NULL, indicating that no one has figured out 2956 what it is yet. 2957 3) '*', indicating that the file should be passed 2958 to the linker. */ 2959 struct infile 2960 { 2961 const char *name; 2962 const char *language; 2963 struct compiler *incompiler; 2964 bool compiled; 2965 bool preprocessed; 2966 }; 2967 2968 /* Also a vector of input files specified. */ 2969 2970 static struct infile *infiles; 2971 2972 int n_infiles; 2973 2974 static int n_infiles_alloc; 2975 2976 /* True if multiple input files are being compiled to a single 2977 assembly file. */ 2978 2979 static bool combine_inputs; 2980 2981 /* This counts the number of libraries added by lang_specific_driver, so that 2982 we can tell if there were any user supplied any files or libraries. */ 2983 2984 static int added_libraries; 2985 2986 /* And a vector of corresponding output files is made up later. */ 2987 2988 const char **outfiles; 2989 2990 #if defined(HAVE_TARGET_OBJECT_SUFFIX) || defined(HAVE_TARGET_EXECUTABLE_SUFFIX) 2991 2992 /* Convert NAME to a new name if it is the standard suffix. DO_EXE 2993 is true if we should look for an executable suffix. DO_OBJ 2994 is true if we should look for an object suffix. */ 2995 2996 static const char * 2997 convert_filename (const char *name, int do_exe ATTRIBUTE_UNUSED, 2998 int do_obj ATTRIBUTE_UNUSED) 2999 { 3000 #if defined(HAVE_TARGET_EXECUTABLE_SUFFIX) 3001 int i; 3002 #endif 3003 int len; 3004 3005 if (name == NULL) 3006 return NULL; 3007 3008 len = strlen (name); 3009 3010 #ifdef HAVE_TARGET_OBJECT_SUFFIX 3011 /* Convert x.o to x.obj if TARGET_OBJECT_SUFFIX is ".obj". */ 3012 if (do_obj && len > 2 3013 && name[len - 2] == '.' 3014 && name[len - 1] == 'o') 3015 { 3016 obstack_grow (&obstack, name, len - 2); 3017 obstack_grow0 (&obstack, TARGET_OBJECT_SUFFIX, strlen (TARGET_OBJECT_SUFFIX)); 3018 name = XOBFINISH (&obstack, const char *); 3019 } 3020 #endif 3021 3022 #if defined(HAVE_TARGET_EXECUTABLE_SUFFIX) 3023 /* If there is no filetype, make it the executable suffix (which includes 3024 the "."). But don't get confused if we have just "-o". */ 3025 if (! do_exe || TARGET_EXECUTABLE_SUFFIX[0] == 0 || (len == 2 && name[0] == '-')) 3026 return name; 3027 3028 for (i = len - 1; i >= 0; i--) 3029 if (IS_DIR_SEPARATOR (name[i])) 3030 break; 3031 3032 for (i++; i < len; i++) 3033 if (name[i] == '.') 3034 return name; 3035 3036 obstack_grow (&obstack, name, len); 3037 obstack_grow0 (&obstack, TARGET_EXECUTABLE_SUFFIX, 3038 strlen (TARGET_EXECUTABLE_SUFFIX)); 3039 name = XOBFINISH (&obstack, const char *); 3040 #endif 3041 3042 return name; 3043 } 3044 #endif 3045 3046 /* Display the command line switches accepted by gcc. */ 3047 static void 3048 display_help (void) 3049 { 3050 printf (_("Usage: %s [options] file...\n"), progname); 3051 fputs (_("Options:\n"), stdout); 3052 3053 fputs (_(" -pass-exit-codes Exit with highest error code from a phase\n"), stdout); 3054 fputs (_(" --help Display this information\n"), stdout); 3055 fputs (_(" --target-help Display target specific command line options\n"), stdout); 3056 fputs (_(" --help={common|optimizers|params|target|warnings|[^]{joined|separate|undocumented}}[,...]\n"), stdout); 3057 fputs (_(" Display specific types of command line options\n"), stdout); 3058 if (! verbose_flag) 3059 fputs (_(" (Use '-v --help' to display command line options of sub-processes)\n"), stdout); 3060 fputs (_(" --version Display compiler version information\n"), stdout); 3061 fputs (_(" -dumpspecs Display all of the built in spec strings\n"), stdout); 3062 fputs (_(" -dumpversion Display the version of the compiler\n"), stdout); 3063 fputs (_(" -dumpmachine Display the compiler's target processor\n"), stdout); 3064 fputs (_(" -print-search-dirs Display the directories in the compiler's search path\n"), stdout); 3065 fputs (_(" -print-libgcc-file-name Display the name of the compiler's companion library\n"), stdout); 3066 fputs (_(" -print-file-name=<lib> Display the full path to library <lib>\n"), stdout); 3067 fputs (_(" -print-prog-name=<prog> Display the full path to compiler component <prog>\n"), stdout); 3068 fputs (_("\ 3069 -print-multiarch Display the target's normalized GNU triplet, used as\n\ 3070 a component in the library path\n"), stdout); 3071 fputs (_(" -print-multi-directory Display the root directory for versions of libgcc\n"), stdout); 3072 fputs (_("\ 3073 -print-multi-lib Display the mapping between command line options and\n\ 3074 multiple library search directories\n"), stdout); 3075 fputs (_(" -print-multi-os-directory Display the relative path to OS libraries\n"), stdout); 3076 fputs (_(" -print-sysroot Display the target libraries directory\n"), stdout); 3077 fputs (_(" -print-sysroot-headers-suffix Display the sysroot suffix used to find headers\n"), stdout); 3078 fputs (_(" -Wa,<options> Pass comma-separated <options> on to the assembler\n"), stdout); 3079 fputs (_(" -Wp,<options> Pass comma-separated <options> on to the preprocessor\n"), stdout); 3080 fputs (_(" -Wl,<options> Pass comma-separated <options> on to the linker\n"), stdout); 3081 fputs (_(" -Xassembler <arg> Pass <arg> on to the assembler\n"), stdout); 3082 fputs (_(" -Xpreprocessor <arg> Pass <arg> on to the preprocessor\n"), stdout); 3083 fputs (_(" -Xlinker <arg> Pass <arg> on to the linker\n"), stdout); 3084 fputs (_(" -save-temps Do not delete intermediate files\n"), stdout); 3085 fputs (_(" -save-temps=<arg> Do not delete intermediate files\n"), stdout); 3086 fputs (_("\ 3087 -no-canonical-prefixes Do not canonicalize paths when building relative\n\ 3088 prefixes to other gcc components\n"), stdout); 3089 fputs (_(" -pipe Use pipes rather than intermediate files\n"), stdout); 3090 fputs (_(" -time Time the execution of each subprocess\n"), stdout); 3091 fputs (_(" -specs=<file> Override built-in specs with the contents of <file>\n"), stdout); 3092 fputs (_(" -std=<standard> Assume that the input sources are for <standard>\n"), stdout); 3093 fputs (_("\ 3094 --sysroot=<directory> Use <directory> as the root directory for headers\n\ 3095 and libraries\n"), stdout); 3096 fputs (_(" -B <directory> Add <directory> to the compiler's search paths\n"), stdout); 3097 fputs (_(" -v Display the programs invoked by the compiler\n"), stdout); 3098 fputs (_(" -### Like -v but options quoted and commands not executed\n"), stdout); 3099 fputs (_(" -E Preprocess only; do not compile, assemble or link\n"), stdout); 3100 fputs (_(" -S Compile only; do not assemble or link\n"), stdout); 3101 fputs (_(" -c Compile and assemble, but do not link\n"), stdout); 3102 fputs (_(" -o <file> Place the output into <file>\n"), stdout); 3103 fputs (_(" -pie Create a position independent executable\n"), stdout); 3104 fputs (_(" -shared Create a shared library\n"), stdout); 3105 fputs (_("\ 3106 -x <language> Specify the language of the following input files\n\ 3107 Permissible languages include: c c++ assembler none\n\ 3108 'none' means revert to the default behavior of\n\ 3109 guessing the language based on the file's extension\n\ 3110 "), stdout); 3111 3112 printf (_("\ 3113 \nOptions starting with -g, -f, -m, -O, -W, or --param are automatically\n\ 3114 passed on to the various sub-processes invoked by %s. In order to pass\n\ 3115 other options on to these processes the -W<letter> options must be used.\n\ 3116 "), progname); 3117 3118 /* The rest of the options are displayed by invocations of the various 3119 sub-processes. */ 3120 } 3121 3122 static void 3123 add_preprocessor_option (const char *option, int len) 3124 { 3125 preprocessor_options.safe_push (save_string (option, len)); 3126 } 3127 3128 static void 3129 add_assembler_option (const char *option, int len) 3130 { 3131 assembler_options.safe_push (save_string (option, len)); 3132 } 3133 3134 static void 3135 add_linker_option (const char *option, int len) 3136 { 3137 linker_options.safe_push (save_string (option, len)); 3138 } 3139 3140 /* Allocate space for an input file in infiles. */ 3141 3142 static void 3143 alloc_infile (void) 3144 { 3145 if (n_infiles_alloc == 0) 3146 { 3147 n_infiles_alloc = 16; 3148 infiles = XNEWVEC (struct infile, n_infiles_alloc); 3149 } 3150 else if (n_infiles_alloc == n_infiles) 3151 { 3152 n_infiles_alloc *= 2; 3153 infiles = XRESIZEVEC (struct infile, infiles, n_infiles_alloc); 3154 } 3155 } 3156 3157 /* Store an input file with the given NAME and LANGUAGE in 3158 infiles. */ 3159 3160 static void 3161 add_infile (const char *name, const char *language) 3162 { 3163 alloc_infile (); 3164 infiles[n_infiles].name = name; 3165 infiles[n_infiles++].language = language; 3166 } 3167 3168 /* Allocate space for a switch in switches. */ 3169 3170 static void 3171 alloc_switch (void) 3172 { 3173 if (n_switches_alloc == 0) 3174 { 3175 n_switches_alloc = 16; 3176 switches = XNEWVEC (struct switchstr, n_switches_alloc); 3177 } 3178 else if (n_switches_alloc == n_switches) 3179 { 3180 n_switches_alloc *= 2; 3181 switches = XRESIZEVEC (struct switchstr, switches, n_switches_alloc); 3182 } 3183 } 3184 3185 /* Save an option OPT with N_ARGS arguments in array ARGS, marking it 3186 as validated if VALIDATED and KNOWN if it is an internal switch. */ 3187 3188 static void 3189 save_switch (const char *opt, size_t n_args, const char *const *args, 3190 bool validated, bool known) 3191 { 3192 alloc_switch (); 3193 switches[n_switches].part1 = opt + 1; 3194 if (n_args == 0) 3195 switches[n_switches].args = 0; 3196 else 3197 { 3198 switches[n_switches].args = XNEWVEC (const char *, n_args + 1); 3199 memcpy (switches[n_switches].args, args, n_args * sizeof (const char *)); 3200 switches[n_switches].args[n_args] = NULL; 3201 } 3202 3203 switches[n_switches].live_cond = 0; 3204 switches[n_switches].validated = validated; 3205 switches[n_switches].known = known; 3206 switches[n_switches].ordering = 0; 3207 n_switches++; 3208 } 3209 3210 /* Handle an option DECODED that is unknown to the option-processing 3211 machinery. */ 3212 3213 static bool 3214 driver_unknown_option_callback (const struct cl_decoded_option *decoded) 3215 { 3216 const char *opt = decoded->arg; 3217 if (opt[1] == 'W' && opt[2] == 'n' && opt[3] == 'o' && opt[4] == '-' 3218 && !(decoded->errors & CL_ERR_NEGATIVE)) 3219 { 3220 /* Leave unknown -Wno-* options for the compiler proper, to be 3221 diagnosed only if there are warnings. */ 3222 save_switch (decoded->canonical_option[0], 3223 decoded->canonical_option_num_elements - 1, 3224 &decoded->canonical_option[1], false, true); 3225 return false; 3226 } 3227 if (decoded->opt_index == OPT_SPECIAL_unknown) 3228 { 3229 /* Give it a chance to define it a a spec file. */ 3230 save_switch (decoded->canonical_option[0], 3231 decoded->canonical_option_num_elements - 1, 3232 &decoded->canonical_option[1], false, false); 3233 return false; 3234 } 3235 else 3236 return true; 3237 } 3238 3239 /* Handle an option DECODED that is not marked as CL_DRIVER. 3240 LANG_MASK will always be CL_DRIVER. */ 3241 3242 static void 3243 driver_wrong_lang_callback (const struct cl_decoded_option *decoded, 3244 unsigned int lang_mask ATTRIBUTE_UNUSED) 3245 { 3246 /* At this point, non-driver options are accepted (and expected to 3247 be passed down by specs) unless marked to be rejected by the 3248 driver. Options to be rejected by the driver but accepted by the 3249 compilers proper are treated just like completely unknown 3250 options. */ 3251 const struct cl_option *option = &cl_options[decoded->opt_index]; 3252 3253 if (option->cl_reject_driver) 3254 error ("unrecognized command line option %qs", 3255 decoded->orig_option_with_args_text); 3256 else 3257 save_switch (decoded->canonical_option[0], 3258 decoded->canonical_option_num_elements - 1, 3259 &decoded->canonical_option[1], false, true); 3260 } 3261 3262 static const char *spec_lang = 0; 3263 static int last_language_n_infiles; 3264 3265 /* Handle a driver option; arguments and return value as for 3266 handle_option. */ 3267 3268 static bool 3269 driver_handle_option (struct gcc_options *opts, 3270 struct gcc_options *opts_set, 3271 const struct cl_decoded_option *decoded, 3272 unsigned int lang_mask ATTRIBUTE_UNUSED, int kind, 3273 location_t loc, 3274 const struct cl_option_handlers *handlers ATTRIBUTE_UNUSED, 3275 diagnostic_context *dc) 3276 { 3277 size_t opt_index = decoded->opt_index; 3278 const char *arg = decoded->arg; 3279 const char *compare_debug_replacement_opt; 3280 int value = decoded->value; 3281 bool validated = false; 3282 bool do_save = true; 3283 3284 gcc_assert (opts == &global_options); 3285 gcc_assert (opts_set == &global_options_set); 3286 gcc_assert (kind == DK_UNSPECIFIED); 3287 gcc_assert (loc == UNKNOWN_LOCATION); 3288 gcc_assert (dc == global_dc); 3289 3290 switch (opt_index) 3291 { 3292 case OPT_dumpspecs: 3293 { 3294 struct spec_list *sl; 3295 init_spec (); 3296 for (sl = specs; sl; sl = sl->next) 3297 printf ("*%s:\n%s\n\n", sl->name, *(sl->ptr_spec)); 3298 if (link_command_spec) 3299 printf ("*link_command:\n%s\n\n", link_command_spec); 3300 exit (0); 3301 } 3302 3303 case OPT_dumpversion: 3304 printf ("%s\n", spec_version); 3305 exit (0); 3306 3307 case OPT_dumpmachine: 3308 printf ("%s\n", spec_machine); 3309 exit (0); 3310 3311 case OPT__version: 3312 print_version = 1; 3313 3314 /* CPP driver cannot obtain switch from cc1_options. */ 3315 if (is_cpp_driver) 3316 add_preprocessor_option ("--version", strlen ("--version")); 3317 add_assembler_option ("--version", strlen ("--version")); 3318 add_linker_option ("--version", strlen ("--version")); 3319 break; 3320 3321 case OPT__help: 3322 print_help_list = 1; 3323 3324 /* CPP driver cannot obtain switch from cc1_options. */ 3325 if (is_cpp_driver) 3326 add_preprocessor_option ("--help", 6); 3327 add_assembler_option ("--help", 6); 3328 add_linker_option ("--help", 6); 3329 break; 3330 3331 case OPT__help_: 3332 print_subprocess_help = 2; 3333 break; 3334 3335 case OPT__target_help: 3336 print_subprocess_help = 1; 3337 3338 /* CPP driver cannot obtain switch from cc1_options. */ 3339 if (is_cpp_driver) 3340 add_preprocessor_option ("--target-help", 13); 3341 add_assembler_option ("--target-help", 13); 3342 add_linker_option ("--target-help", 13); 3343 break; 3344 3345 case OPT__no_sysroot_suffix: 3346 case OPT_pass_exit_codes: 3347 case OPT_print_search_dirs: 3348 case OPT_print_file_name_: 3349 case OPT_print_prog_name_: 3350 case OPT_print_multi_lib: 3351 case OPT_print_multi_directory: 3352 case OPT_print_sysroot: 3353 case OPT_print_multi_os_directory: 3354 case OPT_print_multiarch: 3355 case OPT_print_sysroot_headers_suffix: 3356 case OPT_time: 3357 case OPT_wrapper: 3358 /* These options set the variables specified in common.opt 3359 automatically, and do not need to be saved for spec 3360 processing. */ 3361 do_save = false; 3362 break; 3363 3364 case OPT_print_libgcc_file_name: 3365 print_file_name = "libgcc.a"; 3366 do_save = false; 3367 break; 3368 3369 case OPT_fcompare_debug_second: 3370 compare_debug_second = 1; 3371 break; 3372 3373 case OPT_fcompare_debug: 3374 switch (value) 3375 { 3376 case 0: 3377 compare_debug_replacement_opt = "-fcompare-debug="; 3378 arg = ""; 3379 goto compare_debug_with_arg; 3380 3381 case 1: 3382 compare_debug_replacement_opt = "-fcompare-debug=-gtoggle"; 3383 arg = "-gtoggle"; 3384 goto compare_debug_with_arg; 3385 3386 default: 3387 gcc_unreachable (); 3388 } 3389 break; 3390 3391 case OPT_fcompare_debug_: 3392 compare_debug_replacement_opt = decoded->canonical_option[0]; 3393 compare_debug_with_arg: 3394 gcc_assert (decoded->canonical_option_num_elements == 1); 3395 gcc_assert (arg != NULL); 3396 if (*arg) 3397 compare_debug = 1; 3398 else 3399 compare_debug = -1; 3400 if (compare_debug < 0) 3401 compare_debug_opt = NULL; 3402 else 3403 compare_debug_opt = arg; 3404 save_switch (compare_debug_replacement_opt, 0, NULL, validated, true); 3405 return true; 3406 3407 case OPT_Wa_: 3408 { 3409 int prev, j; 3410 /* Pass the rest of this option to the assembler. */ 3411 3412 /* Split the argument at commas. */ 3413 prev = 0; 3414 for (j = 0; arg[j]; j++) 3415 if (arg[j] == ',') 3416 { 3417 add_assembler_option (arg + prev, j - prev); 3418 prev = j + 1; 3419 } 3420 3421 /* Record the part after the last comma. */ 3422 add_assembler_option (arg + prev, j - prev); 3423 } 3424 do_save = false; 3425 break; 3426 3427 case OPT_Wp_: 3428 { 3429 int prev, j; 3430 /* Pass the rest of this option to the preprocessor. */ 3431 3432 /* Split the argument at commas. */ 3433 prev = 0; 3434 for (j = 0; arg[j]; j++) 3435 if (arg[j] == ',') 3436 { 3437 add_preprocessor_option (arg + prev, j - prev); 3438 prev = j + 1; 3439 } 3440 3441 /* Record the part after the last comma. */ 3442 add_preprocessor_option (arg + prev, j - prev); 3443 } 3444 do_save = false; 3445 break; 3446 3447 case OPT_Wl_: 3448 { 3449 int prev, j; 3450 /* Split the argument at commas. */ 3451 prev = 0; 3452 for (j = 0; arg[j]; j++) 3453 if (arg[j] == ',') 3454 { 3455 add_infile (save_string (arg + prev, j - prev), "*"); 3456 prev = j + 1; 3457 } 3458 /* Record the part after the last comma. */ 3459 add_infile (arg + prev, "*"); 3460 } 3461 do_save = false; 3462 break; 3463 3464 case OPT_Xlinker: 3465 add_infile (arg, "*"); 3466 do_save = false; 3467 break; 3468 3469 case OPT_Xpreprocessor: 3470 add_preprocessor_option (arg, strlen (arg)); 3471 do_save = false; 3472 break; 3473 3474 case OPT_Xassembler: 3475 add_assembler_option (arg, strlen (arg)); 3476 do_save = false; 3477 break; 3478 3479 case OPT_l: 3480 /* POSIX allows separation of -l and the lib arg; canonicalize 3481 by concatenating -l with its arg */ 3482 add_infile (concat ("-l", arg, NULL), "*"); 3483 do_save = false; 3484 break; 3485 3486 case OPT_L: 3487 /* Similarly, canonicalize -L for linkers that may not accept 3488 separate arguments. */ 3489 save_switch (concat ("-L", arg, NULL), 0, NULL, validated, true); 3490 return true; 3491 3492 case OPT_F: 3493 /* Likewise -F. */ 3494 save_switch (concat ("-F", arg, NULL), 0, NULL, validated, true); 3495 return true; 3496 3497 case OPT_save_temps: 3498 save_temps_flag = SAVE_TEMPS_CWD; 3499 validated = true; 3500 break; 3501 3502 case OPT_save_temps_: 3503 if (strcmp (arg, "cwd") == 0) 3504 save_temps_flag = SAVE_TEMPS_CWD; 3505 else if (strcmp (arg, "obj") == 0 3506 || strcmp (arg, "object") == 0) 3507 save_temps_flag = SAVE_TEMPS_OBJ; 3508 else 3509 fatal_error ("%qs is an unknown -save-temps option", 3510 decoded->orig_option_with_args_text); 3511 break; 3512 3513 case OPT_no_canonical_prefixes: 3514 /* Already handled as a special case, so ignored here. */ 3515 do_save = false; 3516 break; 3517 3518 case OPT_pipe: 3519 validated = true; 3520 /* These options set the variables specified in common.opt 3521 automatically, but do need to be saved for spec 3522 processing. */ 3523 break; 3524 3525 case OPT_specs_: 3526 { 3527 struct user_specs *user = XNEW (struct user_specs); 3528 3529 user->next = (struct user_specs *) 0; 3530 user->filename = arg; 3531 if (user_specs_tail) 3532 user_specs_tail->next = user; 3533 else 3534 user_specs_head = user; 3535 user_specs_tail = user; 3536 } 3537 validated = true; 3538 break; 3539 3540 case OPT__sysroot_: 3541 target_system_root = arg; 3542 target_system_root_changed = 1; 3543 do_save = false; 3544 break; 3545 3546 case OPT_time_: 3547 if (report_times_to_file) 3548 fclose (report_times_to_file); 3549 report_times_to_file = fopen (arg, "a"); 3550 do_save = false; 3551 break; 3552 3553 case OPT____: 3554 /* "-###" 3555 This is similar to -v except that there is no execution 3556 of the commands and the echoed arguments are quoted. It 3557 is intended for use in shell scripts to capture the 3558 driver-generated command line. */ 3559 verbose_only_flag++; 3560 verbose_flag = 1; 3561 do_save = false; 3562 break; 3563 3564 case OPT_B: 3565 { 3566 size_t len = strlen (arg); 3567 3568 /* Catch the case where the user has forgotten to append a 3569 directory separator to the path. Note, they may be using 3570 -B to add an executable name prefix, eg "i386-elf-", in 3571 order to distinguish between multiple installations of 3572 GCC in the same directory. Hence we must check to see 3573 if appending a directory separator actually makes a 3574 valid directory name. */ 3575 if (!IS_DIR_SEPARATOR (arg[len - 1]) 3576 && is_directory (arg, false)) 3577 { 3578 char *tmp = XNEWVEC (char, len + 2); 3579 strcpy (tmp, arg); 3580 tmp[len] = DIR_SEPARATOR; 3581 tmp[++len] = 0; 3582 arg = tmp; 3583 } 3584 3585 add_prefix (&exec_prefixes, arg, NULL, 3586 PREFIX_PRIORITY_B_OPT, 0, 0); 3587 add_prefix (&startfile_prefixes, arg, NULL, 3588 PREFIX_PRIORITY_B_OPT, 0, 0); 3589 add_prefix (&include_prefixes, arg, NULL, 3590 PREFIX_PRIORITY_B_OPT, 0, 0); 3591 } 3592 validated = true; 3593 break; 3594 3595 case OPT_x: 3596 spec_lang = arg; 3597 if (!strcmp (spec_lang, "none")) 3598 /* Suppress the warning if -xnone comes after the last input 3599 file, because alternate command interfaces like g++ might 3600 find it useful to place -xnone after each input file. */ 3601 spec_lang = 0; 3602 else 3603 last_language_n_infiles = n_infiles; 3604 do_save = false; 3605 break; 3606 3607 case OPT_o: 3608 have_o = 1; 3609 #if defined(HAVE_TARGET_EXECUTABLE_SUFFIX) || defined(HAVE_TARGET_OBJECT_SUFFIX) 3610 arg = convert_filename (arg, ! have_c, 0); 3611 #endif 3612 /* Save the output name in case -save-temps=obj was used. */ 3613 save_temps_prefix = xstrdup (arg); 3614 /* On some systems, ld cannot handle "-o" without a space. So 3615 split the option from its argument. */ 3616 save_switch ("-o", 1, &arg, validated, true); 3617 return true; 3618 3619 case OPT_static_libgcc: 3620 case OPT_shared_libgcc: 3621 case OPT_static_libgfortran: 3622 case OPT_static_libstdc__: 3623 /* These are always valid, since gcc.c itself understands the 3624 first two, gfortranspec.c understands -static-libgfortran and 3625 g++spec.c understands -static-libstdc++ */ 3626 validated = true; 3627 break; 3628 3629 default: 3630 /* Various driver options need no special processing at this 3631 point, having been handled in a prescan above or being 3632 handled by specs. */ 3633 break; 3634 } 3635 3636 if (do_save) 3637 save_switch (decoded->canonical_option[0], 3638 decoded->canonical_option_num_elements - 1, 3639 &decoded->canonical_option[1], validated, true); 3640 return true; 3641 } 3642 3643 /* Put the driver's standard set of option handlers in *HANDLERS. */ 3644 3645 static void 3646 set_option_handlers (struct cl_option_handlers *handlers) 3647 { 3648 handlers->unknown_option_callback = driver_unknown_option_callback; 3649 handlers->wrong_lang_callback = driver_wrong_lang_callback; 3650 handlers->num_handlers = 3; 3651 handlers->handlers[0].handler = driver_handle_option; 3652 handlers->handlers[0].mask = CL_DRIVER; 3653 handlers->handlers[1].handler = common_handle_option; 3654 handlers->handlers[1].mask = CL_COMMON; 3655 handlers->handlers[2].handler = target_handle_option; 3656 handlers->handlers[2].mask = CL_TARGET; 3657 } 3658 3659 /* Create the vector `switches' and its contents. 3660 Store its length in `n_switches'. */ 3661 3662 static void 3663 process_command (unsigned int decoded_options_count, 3664 struct cl_decoded_option *decoded_options) 3665 { 3666 const char *temp; 3667 char *temp1; 3668 char *tooldir_prefix, *tooldir_prefix2; 3669 char *(*get_relative_prefix) (const char *, const char *, 3670 const char *) = NULL; 3671 struct cl_option_handlers handlers; 3672 unsigned int j; 3673 3674 gcc_exec_prefix = getenv ("GCC_EXEC_PREFIX"); 3675 3676 n_switches = 0; 3677 n_infiles = 0; 3678 added_libraries = 0; 3679 3680 /* Figure compiler version from version string. */ 3681 3682 compiler_version = temp1 = xstrdup (version_string); 3683 3684 for (; *temp1; ++temp1) 3685 { 3686 if (*temp1 == ' ') 3687 { 3688 *temp1 = '\0'; 3689 break; 3690 } 3691 } 3692 3693 /* Handle any -no-canonical-prefixes flag early, to assign the function 3694 that builds relative prefixes. This function creates default search 3695 paths that are needed later in normal option handling. */ 3696 3697 for (j = 1; j < decoded_options_count; j++) 3698 { 3699 if (decoded_options[j].opt_index == OPT_no_canonical_prefixes) 3700 { 3701 get_relative_prefix = make_relative_prefix_ignore_links; 3702 break; 3703 } 3704 } 3705 if (! get_relative_prefix) 3706 get_relative_prefix = make_relative_prefix; 3707 3708 /* Set up the default search paths. If there is no GCC_EXEC_PREFIX, 3709 see if we can create it from the pathname specified in 3710 decoded_options[0].arg. */ 3711 3712 gcc_libexec_prefix = standard_libexec_prefix; 3713 #ifndef VMS 3714 /* FIXME: make_relative_prefix doesn't yet work for VMS. */ 3715 if (!gcc_exec_prefix) 3716 { 3717 #ifdef NETBSD_NATIVE 3718 add_prefix (&exec_prefixes, standard_libexec_prefix, "GCC", 3719 PREFIX_PRIORITY_LAST, 0, 0); 3720 #else 3721 gcc_exec_prefix = get_relative_prefix (decoded_options[0].arg, 3722 standard_bindir_prefix, 3723 standard_exec_prefix); 3724 gcc_libexec_prefix = get_relative_prefix (decoded_options[0].arg, 3725 standard_bindir_prefix, 3726 standard_libexec_prefix); 3727 if (gcc_exec_prefix) 3728 xputenv (concat ("GCC_EXEC_PREFIX=", gcc_exec_prefix, NULL)); 3729 #endif 3730 } 3731 else 3732 { 3733 /* make_relative_prefix requires a program name, but 3734 GCC_EXEC_PREFIX is typically a directory name with a trailing 3735 / (which is ignored by make_relative_prefix), so append a 3736 program name. */ 3737 char *tmp_prefix = concat (gcc_exec_prefix, "gcc", NULL); 3738 gcc_libexec_prefix = get_relative_prefix (tmp_prefix, 3739 standard_exec_prefix, 3740 standard_libexec_prefix); 3741 3742 /* The path is unrelocated, so fallback to the original setting. */ 3743 if (!gcc_libexec_prefix) 3744 gcc_libexec_prefix = standard_libexec_prefix; 3745 3746 free (tmp_prefix); 3747 } 3748 #else 3749 #endif 3750 /* From this point onward, gcc_exec_prefix is non-null if the toolchain 3751 is relocated. The toolchain was either relocated using GCC_EXEC_PREFIX 3752 or an automatically created GCC_EXEC_PREFIX from 3753 decoded_options[0].arg. */ 3754 3755 /* Do language-specific adjustment/addition of flags. */ 3756 lang_specific_driver (&decoded_options, &decoded_options_count, 3757 &added_libraries); 3758 3759 if (gcc_exec_prefix) 3760 { 3761 int len = strlen (gcc_exec_prefix); 3762 3763 if (len > (int) sizeof ("/lib/gcc/") - 1 3764 && (IS_DIR_SEPARATOR (gcc_exec_prefix[len-1]))) 3765 { 3766 temp = gcc_exec_prefix + len - sizeof ("/lib/gcc/") + 1; 3767 if (IS_DIR_SEPARATOR (*temp) 3768 && filename_ncmp (temp + 1, "lib", 3) == 0 3769 && IS_DIR_SEPARATOR (temp[4]) 3770 && filename_ncmp (temp + 5, "gcc", 3) == 0) 3771 len -= sizeof ("/lib/gcc/") - 1; 3772 } 3773 3774 set_std_prefix (gcc_exec_prefix, len); 3775 add_prefix (&exec_prefixes, gcc_libexec_prefix, "GCC", 3776 PREFIX_PRIORITY_LAST, 0, 0); 3777 add_prefix (&startfile_prefixes, gcc_exec_prefix, "GCC", 3778 PREFIX_PRIORITY_LAST, 0, 0); 3779 } 3780 3781 /* COMPILER_PATH and LIBRARY_PATH have values 3782 that are lists of directory names with colons. */ 3783 3784 temp = getenv ("COMPILER_PATH"); 3785 if (temp) 3786 { 3787 const char *startp, *endp; 3788 char *nstore = (char *) alloca (strlen (temp) + 3); 3789 3790 startp = endp = temp; 3791 while (1) 3792 { 3793 if (*endp == PATH_SEPARATOR || *endp == 0) 3794 { 3795 strncpy (nstore, startp, endp - startp); 3796 if (endp == startp) 3797 strcpy (nstore, concat (".", dir_separator_str, NULL)); 3798 else if (!IS_DIR_SEPARATOR (endp[-1])) 3799 { 3800 nstore[endp - startp] = DIR_SEPARATOR; 3801 nstore[endp - startp + 1] = 0; 3802 } 3803 else 3804 nstore[endp - startp] = 0; 3805 add_prefix (&exec_prefixes, nstore, 0, 3806 PREFIX_PRIORITY_LAST, 0, 0); 3807 add_prefix (&include_prefixes, nstore, 0, 3808 PREFIX_PRIORITY_LAST, 0, 0); 3809 if (*endp == 0) 3810 break; 3811 endp = startp = endp + 1; 3812 } 3813 else 3814 endp++; 3815 } 3816 } 3817 3818 temp = getenv (LIBRARY_PATH_ENV); 3819 if (temp && *cross_compile == '0') 3820 { 3821 const char *startp, *endp; 3822 char *nstore = (char *) alloca (strlen (temp) + 3); 3823 3824 startp = endp = temp; 3825 while (1) 3826 { 3827 if (*endp == PATH_SEPARATOR || *endp == 0) 3828 { 3829 strncpy (nstore, startp, endp - startp); 3830 if (endp == startp) 3831 strcpy (nstore, concat (".", dir_separator_str, NULL)); 3832 else if (!IS_DIR_SEPARATOR (endp[-1])) 3833 { 3834 nstore[endp - startp] = DIR_SEPARATOR; 3835 nstore[endp - startp + 1] = 0; 3836 } 3837 else 3838 nstore[endp - startp] = 0; 3839 add_prefix (&startfile_prefixes, nstore, NULL, 3840 PREFIX_PRIORITY_LAST, 0, 1); 3841 if (*endp == 0) 3842 break; 3843 endp = startp = endp + 1; 3844 } 3845 else 3846 endp++; 3847 } 3848 } 3849 3850 /* Use LPATH like LIBRARY_PATH (for the CMU build program). */ 3851 temp = getenv ("LPATH"); 3852 if (temp && *cross_compile == '0') 3853 { 3854 const char *startp, *endp; 3855 char *nstore = (char *) alloca (strlen (temp) + 3); 3856 3857 startp = endp = temp; 3858 while (1) 3859 { 3860 if (*endp == PATH_SEPARATOR || *endp == 0) 3861 { 3862 strncpy (nstore, startp, endp - startp); 3863 if (endp == startp) 3864 strcpy (nstore, concat (".", dir_separator_str, NULL)); 3865 else if (!IS_DIR_SEPARATOR (endp[-1])) 3866 { 3867 nstore[endp - startp] = DIR_SEPARATOR; 3868 nstore[endp - startp + 1] = 0; 3869 } 3870 else 3871 nstore[endp - startp] = 0; 3872 add_prefix (&startfile_prefixes, nstore, NULL, 3873 PREFIX_PRIORITY_LAST, 0, 1); 3874 if (*endp == 0) 3875 break; 3876 endp = startp = endp + 1; 3877 } 3878 else 3879 endp++; 3880 } 3881 } 3882 3883 /* Process the options and store input files and switches in their 3884 vectors. */ 3885 3886 last_language_n_infiles = -1; 3887 3888 set_option_handlers (&handlers); 3889 3890 for (j = 1; j < decoded_options_count; j++) 3891 { 3892 switch (decoded_options[j].opt_index) 3893 { 3894 case OPT_S: 3895 case OPT_c: 3896 case OPT_E: 3897 have_c = 1; 3898 break; 3899 } 3900 if (have_c) 3901 break; 3902 } 3903 3904 for (j = 1; j < decoded_options_count; j++) 3905 { 3906 if (decoded_options[j].opt_index == OPT_SPECIAL_input_file) 3907 { 3908 const char *arg = decoded_options[j].arg; 3909 const char *p = strrchr (arg, '@'); 3910 char *fname; 3911 long offset; 3912 int consumed; 3913 #ifdef HAVE_TARGET_OBJECT_SUFFIX 3914 arg = convert_filename (arg, 0, access (arg, F_OK)); 3915 #endif 3916 /* For LTO static archive support we handle input file 3917 specifications that are composed of a filename and 3918 an offset like FNAME@OFFSET. */ 3919 if (p 3920 && p != arg 3921 && sscanf (p, "@%li%n", &offset, &consumed) >= 1 3922 && strlen (p) == (unsigned int)consumed) 3923 { 3924 fname = (char *)xmalloc (p - arg + 1); 3925 memcpy (fname, arg, p - arg); 3926 fname[p - arg] = '\0'; 3927 /* Only accept non-stdin and existing FNAME parts, otherwise 3928 try with the full name. */ 3929 if (strcmp (fname, "-") == 0 || access (fname, F_OK) < 0) 3930 { 3931 free (fname); 3932 fname = xstrdup (arg); 3933 } 3934 } 3935 else 3936 fname = xstrdup (arg); 3937 3938 if (strcmp (fname, "-") != 0 && access (fname, F_OK) < 0) 3939 perror_with_name (fname); 3940 else 3941 add_infile (arg, spec_lang); 3942 3943 free (fname); 3944 continue; 3945 } 3946 3947 read_cmdline_option (&global_options, &global_options_set, 3948 decoded_options + j, UNKNOWN_LOCATION, 3949 CL_DRIVER, &handlers, global_dc); 3950 } 3951 3952 /* If -save-temps=obj and -o name, create the prefix to use for %b. 3953 Otherwise just make -save-temps=obj the same as -save-temps=cwd. */ 3954 if (save_temps_flag == SAVE_TEMPS_OBJ && save_temps_prefix != NULL) 3955 { 3956 save_temps_length = strlen (save_temps_prefix); 3957 temp = strrchr (lbasename (save_temps_prefix), '.'); 3958 if (temp) 3959 { 3960 save_temps_length -= strlen (temp); 3961 save_temps_prefix[save_temps_length] = '\0'; 3962 } 3963 3964 } 3965 else if (save_temps_prefix != NULL) 3966 { 3967 free (save_temps_prefix); 3968 save_temps_prefix = NULL; 3969 } 3970 3971 if (save_temps_flag && use_pipes) 3972 { 3973 /* -save-temps overrides -pipe, so that temp files are produced */ 3974 if (save_temps_flag) 3975 warning (0, "-pipe ignored because -save-temps specified"); 3976 use_pipes = 0; 3977 } 3978 3979 if (!compare_debug) 3980 { 3981 const char *gcd = getenv ("GCC_COMPARE_DEBUG"); 3982 3983 if (gcd && gcd[0] == '-') 3984 { 3985 compare_debug = 2; 3986 compare_debug_opt = gcd; 3987 } 3988 else if (gcd && *gcd && strcmp (gcd, "0")) 3989 { 3990 compare_debug = 3; 3991 compare_debug_opt = "-gtoggle"; 3992 } 3993 } 3994 else if (compare_debug < 0) 3995 { 3996 compare_debug = 0; 3997 gcc_assert (!compare_debug_opt); 3998 } 3999 4000 /* Set up the search paths. We add directories that we expect to 4001 contain GNU Toolchain components before directories specified by 4002 the machine description so that we will find GNU components (like 4003 the GNU assembler) before those of the host system. */ 4004 4005 /* If we don't know where the toolchain has been installed, use the 4006 configured-in locations. */ 4007 if (!gcc_exec_prefix) 4008 { 4009 #ifndef OS2 4010 add_prefix (&exec_prefixes, standard_libexec_prefix, "GCC", 4011 PREFIX_PRIORITY_LAST, 1, 0); 4012 add_prefix (&exec_prefixes, standard_libexec_prefix, "BINUTILS", 4013 PREFIX_PRIORITY_LAST, 2, 0); 4014 add_prefix (&exec_prefixes, standard_exec_prefix, "BINUTILS", 4015 PREFIX_PRIORITY_LAST, 2, 0); 4016 #endif 4017 add_prefix (&startfile_prefixes, standard_exec_prefix, "BINUTILS", 4018 PREFIX_PRIORITY_LAST, 1, 0); 4019 } 4020 4021 gcc_assert (!IS_ABSOLUTE_PATH (tooldir_base_prefix)); 4022 tooldir_prefix2 = concat (tooldir_base_prefix, spec_machine, 4023 dir_separator_str, NULL); 4024 4025 /* Look for tools relative to the location from which the driver is 4026 running, or, if that is not available, the configured prefix. */ 4027 tooldir_prefix 4028 = concat (gcc_exec_prefix ? gcc_exec_prefix : standard_exec_prefix, 4029 spec_machine, dir_separator_str, 4030 spec_version, dir_separator_str, tooldir_prefix2, NULL); 4031 free (tooldir_prefix2); 4032 4033 add_prefix (&exec_prefixes, 4034 concat (tooldir_prefix, "bin", dir_separator_str, NULL), 4035 "BINUTILS", PREFIX_PRIORITY_LAST, 0, 0); 4036 add_prefix (&startfile_prefixes, 4037 concat (tooldir_prefix, "lib", dir_separator_str, NULL), 4038 "BINUTILS", PREFIX_PRIORITY_LAST, 0, 1); 4039 free (tooldir_prefix); 4040 4041 #if defined(TARGET_SYSTEM_ROOT_RELOCATABLE) && !defined(VMS) 4042 /* If the normal TARGET_SYSTEM_ROOT is inside of $exec_prefix, 4043 then consider it to relocate with the rest of the GCC installation 4044 if GCC_EXEC_PREFIX is set. 4045 ``make_relative_prefix'' is not compiled for VMS, so don't call it. */ 4046 if (target_system_root && !target_system_root_changed && gcc_exec_prefix) 4047 { 4048 char *tmp_prefix = get_relative_prefix (decoded_options[0].arg, 4049 standard_bindir_prefix, 4050 target_system_root); 4051 if (tmp_prefix && access_check (tmp_prefix, F_OK) == 0) 4052 { 4053 target_system_root = tmp_prefix; 4054 target_system_root_changed = 1; 4055 } 4056 } 4057 #endif 4058 4059 /* More prefixes are enabled in main, after we read the specs file 4060 and determine whether this is cross-compilation or not. */ 4061 4062 if (n_infiles == last_language_n_infiles && spec_lang != 0) 4063 warning (0, "%<-x %s%> after last input file has no effect", spec_lang); 4064 4065 /* Synthesize -fcompare-debug flag from the GCC_COMPARE_DEBUG 4066 environment variable. */ 4067 if (compare_debug == 2 || compare_debug == 3) 4068 { 4069 const char *opt = concat ("-fcompare-debug=", compare_debug_opt, NULL); 4070 save_switch (opt, 0, NULL, false, true); 4071 compare_debug = 1; 4072 } 4073 4074 /* Ensure we only invoke each subprocess once. */ 4075 if (print_subprocess_help || print_help_list || print_version) 4076 { 4077 n_infiles = 0; 4078 4079 /* Create a dummy input file, so that we can pass 4080 the help option on to the various sub-processes. */ 4081 add_infile ("help-dummy", "c"); 4082 } 4083 4084 alloc_switch (); 4085 switches[n_switches].part1 = 0; 4086 alloc_infile (); 4087 infiles[n_infiles].name = 0; 4088 } 4089 4090 /* Store switches not filtered out by %<S in spec in COLLECT_GCC_OPTIONS 4091 and place that in the environment. */ 4092 4093 static void 4094 set_collect_gcc_options (void) 4095 { 4096 int i; 4097 int first_time; 4098 4099 /* Build COLLECT_GCC_OPTIONS to have all of the options specified to 4100 the compiler. */ 4101 obstack_grow (&collect_obstack, "COLLECT_GCC_OPTIONS=", 4102 sizeof ("COLLECT_GCC_OPTIONS=") - 1); 4103 4104 first_time = TRUE; 4105 for (i = 0; (int) i < n_switches; i++) 4106 { 4107 const char *const *args; 4108 const char *p, *q; 4109 if (!first_time) 4110 obstack_grow (&collect_obstack, " ", 1); 4111 4112 first_time = FALSE; 4113 4114 /* Ignore elided switches. */ 4115 if ((switches[i].live_cond 4116 & (SWITCH_IGNORE | SWITCH_KEEP_FOR_GCC)) 4117 == SWITCH_IGNORE) 4118 continue; 4119 4120 obstack_grow (&collect_obstack, "'-", 2); 4121 q = switches[i].part1; 4122 while ((p = strchr (q, '\''))) 4123 { 4124 obstack_grow (&collect_obstack, q, p - q); 4125 obstack_grow (&collect_obstack, "'\\''", 4); 4126 q = ++p; 4127 } 4128 obstack_grow (&collect_obstack, q, strlen (q)); 4129 obstack_grow (&collect_obstack, "'", 1); 4130 4131 for (args = switches[i].args; args && *args; args++) 4132 { 4133 obstack_grow (&collect_obstack, " '", 2); 4134 q = *args; 4135 while ((p = strchr (q, '\''))) 4136 { 4137 obstack_grow (&collect_obstack, q, p - q); 4138 obstack_grow (&collect_obstack, "'\\''", 4); 4139 q = ++p; 4140 } 4141 obstack_grow (&collect_obstack, q, strlen (q)); 4142 obstack_grow (&collect_obstack, "'", 1); 4143 } 4144 } 4145 obstack_grow (&collect_obstack, "\0", 1); 4146 xputenv (XOBFINISH (&collect_obstack, char *)); 4147 } 4148 4149 /* Process a spec string, accumulating and running commands. */ 4150 4151 /* These variables describe the input file name. 4152 input_file_number is the index on outfiles of this file, 4153 so that the output file name can be stored for later use by %o. 4154 input_basename is the start of the part of the input file 4155 sans all directory names, and basename_length is the number 4156 of characters starting there excluding the suffix .c or whatever. */ 4157 4158 static const char *gcc_input_filename; 4159 static int input_file_number; 4160 size_t input_filename_length; 4161 static int basename_length; 4162 static int suffixed_basename_length; 4163 static const char *input_basename; 4164 static const char *input_suffix; 4165 #ifndef HOST_LACKS_INODE_NUMBERS 4166 static struct stat input_stat; 4167 #endif 4168 static int input_stat_set; 4169 4170 /* The compiler used to process the current input file. */ 4171 static struct compiler *input_file_compiler; 4172 4173 /* These are variables used within do_spec and do_spec_1. */ 4174 4175 /* Nonzero if an arg has been started and not yet terminated 4176 (with space, tab or newline). */ 4177 static int arg_going; 4178 4179 /* Nonzero means %d or %g has been seen; the next arg to be terminated 4180 is a temporary file name. */ 4181 static int delete_this_arg; 4182 4183 /* Nonzero means %w has been seen; the next arg to be terminated 4184 is the output file name of this compilation. */ 4185 static int this_is_output_file; 4186 4187 /* Nonzero means %s has been seen; the next arg to be terminated 4188 is the name of a library file and we should try the standard 4189 search dirs for it. */ 4190 static int this_is_library_file; 4191 4192 /* Nonzero means %T has been seen; the next arg to be terminated 4193 is the name of a linker script and we should try all of the 4194 standard search dirs for it. If it is found insert a --script 4195 command line switch and then substitute the full path in place, 4196 otherwise generate an error message. */ 4197 static int this_is_linker_script; 4198 4199 /* Nonzero means that the input of this command is coming from a pipe. */ 4200 static int input_from_pipe; 4201 4202 /* Nonnull means substitute this for any suffix when outputting a switches 4203 arguments. */ 4204 static const char *suffix_subst; 4205 4206 /* If there is an argument being accumulated, terminate it and store it. */ 4207 4208 static void 4209 end_going_arg (void) 4210 { 4211 if (arg_going) 4212 { 4213 const char *string; 4214 4215 obstack_1grow (&obstack, 0); 4216 string = XOBFINISH (&obstack, const char *); 4217 if (this_is_library_file) 4218 string = find_file (string); 4219 if (this_is_linker_script) 4220 { 4221 char * full_script_path = find_a_file (&startfile_prefixes, string, R_OK, true); 4222 4223 if (full_script_path == NULL) 4224 { 4225 error ("unable to locate default linker script %qs in the library search paths", string); 4226 /* Script was not found on search path. */ 4227 return; 4228 } 4229 store_arg ("--script", false, false); 4230 string = full_script_path; 4231 } 4232 store_arg (string, delete_this_arg, this_is_output_file); 4233 if (this_is_output_file) 4234 outfiles[input_file_number] = string; 4235 arg_going = 0; 4236 } 4237 } 4238 4239 4240 /* Parse the WRAPPER string which is a comma separated list of the command line 4241 and insert them into the beginning of argbuf. */ 4242 4243 static void 4244 insert_wrapper (const char *wrapper) 4245 { 4246 int n = 0; 4247 int i; 4248 char *buf = xstrdup (wrapper); 4249 char *p = buf; 4250 unsigned int old_length = argbuf.length (); 4251 4252 do 4253 { 4254 n++; 4255 while (*p == ',') 4256 p++; 4257 } 4258 while ((p = strchr (p, ',')) != NULL); 4259 4260 argbuf.safe_grow (old_length + n); 4261 memmove (argbuf.address () + n, 4262 argbuf.address (), 4263 old_length * sizeof (const_char_p)); 4264 4265 i = 0; 4266 p = buf; 4267 do 4268 { 4269 while (*p == ',') 4270 { 4271 *p = 0; 4272 p++; 4273 } 4274 argbuf[i] = p; 4275 i++; 4276 } 4277 while ((p = strchr (p, ',')) != NULL); 4278 gcc_assert (i == n); 4279 } 4280 4281 /* Process the spec SPEC and run the commands specified therein. 4282 Returns 0 if the spec is successfully processed; -1 if failed. */ 4283 4284 int 4285 do_spec (const char *spec) 4286 { 4287 int value; 4288 4289 value = do_spec_2 (spec); 4290 4291 /* Force out any unfinished command. 4292 If -pipe, this forces out the last command if it ended in `|'. */ 4293 if (value == 0) 4294 { 4295 if (argbuf.length () > 0 4296 && !strcmp (argbuf.last (), "|")) 4297 argbuf.pop (); 4298 4299 set_collect_gcc_options (); 4300 4301 if (argbuf.length () > 0) 4302 value = execute (); 4303 } 4304 4305 return value; 4306 } 4307 4308 static int 4309 do_spec_2 (const char *spec) 4310 { 4311 int result; 4312 4313 clear_args (); 4314 arg_going = 0; 4315 delete_this_arg = 0; 4316 this_is_output_file = 0; 4317 this_is_library_file = 0; 4318 this_is_linker_script = 0; 4319 input_from_pipe = 0; 4320 suffix_subst = NULL; 4321 4322 result = do_spec_1 (spec, 0, NULL); 4323 4324 end_going_arg (); 4325 4326 return result; 4327 } 4328 4329 4330 /* Process the given spec string and add any new options to the end 4331 of the switches/n_switches array. */ 4332 4333 static void 4334 do_option_spec (const char *name, const char *spec) 4335 { 4336 unsigned int i, value_count, value_len; 4337 const char *p, *q, *value; 4338 char *tmp_spec, *tmp_spec_p; 4339 4340 if (configure_default_options[0].name == NULL) 4341 return; 4342 4343 for (i = 0; i < ARRAY_SIZE (configure_default_options); i++) 4344 if (strcmp (configure_default_options[i].name, name) == 0) 4345 break; 4346 if (i == ARRAY_SIZE (configure_default_options)) 4347 return; 4348 4349 value = configure_default_options[i].value; 4350 value_len = strlen (value); 4351 4352 /* Compute the size of the final spec. */ 4353 value_count = 0; 4354 p = spec; 4355 while ((p = strstr (p, "%(VALUE)")) != NULL) 4356 { 4357 p ++; 4358 value_count ++; 4359 } 4360 4361 /* Replace each %(VALUE) by the specified value. */ 4362 tmp_spec = (char *) alloca (strlen (spec) + 1 4363 + value_count * (value_len - strlen ("%(VALUE)"))); 4364 tmp_spec_p = tmp_spec; 4365 q = spec; 4366 while ((p = strstr (q, "%(VALUE)")) != NULL) 4367 { 4368 memcpy (tmp_spec_p, q, p - q); 4369 tmp_spec_p = tmp_spec_p + (p - q); 4370 memcpy (tmp_spec_p, value, value_len); 4371 tmp_spec_p += value_len; 4372 q = p + strlen ("%(VALUE)"); 4373 } 4374 strcpy (tmp_spec_p, q); 4375 4376 do_self_spec (tmp_spec); 4377 } 4378 4379 /* Process the given spec string and add any new options to the end 4380 of the switches/n_switches array. */ 4381 4382 static void 4383 do_self_spec (const char *spec) 4384 { 4385 int i; 4386 4387 do_spec_2 (spec); 4388 do_spec_1 (" ", 0, NULL); 4389 4390 /* Mark %<S switches processed by do_self_spec to be ignored permanently. 4391 do_self_specs adds the replacements to switches array, so it shouldn't 4392 be processed afterwards. */ 4393 for (i = 0; i < n_switches; i++) 4394 if ((switches[i].live_cond & SWITCH_IGNORE)) 4395 switches[i].live_cond |= SWITCH_IGNORE_PERMANENTLY; 4396 4397 if (argbuf.length () > 0) 4398 { 4399 const char **argbuf_copy; 4400 struct cl_decoded_option *decoded_options; 4401 struct cl_option_handlers handlers; 4402 unsigned int decoded_options_count; 4403 unsigned int j; 4404 4405 /* Create a copy of argbuf with a dummy argv[0] entry for 4406 decode_cmdline_options_to_array. */ 4407 argbuf_copy = XNEWVEC (const char *, 4408 argbuf.length () + 1); 4409 argbuf_copy[0] = ""; 4410 memcpy (argbuf_copy + 1, argbuf.address (), 4411 argbuf.length () * sizeof (const char *)); 4412 4413 decode_cmdline_options_to_array (argbuf.length () + 1, 4414 argbuf_copy, 4415 CL_DRIVER, &decoded_options, 4416 &decoded_options_count); 4417 free (argbuf_copy); 4418 4419 set_option_handlers (&handlers); 4420 4421 for (j = 1; j < decoded_options_count; j++) 4422 { 4423 switch (decoded_options[j].opt_index) 4424 { 4425 case OPT_SPECIAL_input_file: 4426 /* Specs should only generate options, not input 4427 files. */ 4428 if (strcmp (decoded_options[j].arg, "-") != 0) 4429 fatal_error ("switch %qs does not start with %<-%>", 4430 decoded_options[j].arg); 4431 else 4432 fatal_error ("spec-generated switch is just %<-%>"); 4433 break; 4434 4435 case OPT_fcompare_debug_second: 4436 case OPT_fcompare_debug: 4437 case OPT_fcompare_debug_: 4438 case OPT_o: 4439 /* Avoid duplicate processing of some options from 4440 compare-debug specs; just save them here. */ 4441 save_switch (decoded_options[j].canonical_option[0], 4442 (decoded_options[j].canonical_option_num_elements 4443 - 1), 4444 &decoded_options[j].canonical_option[1], false, true); 4445 break; 4446 4447 default: 4448 read_cmdline_option (&global_options, &global_options_set, 4449 decoded_options + j, UNKNOWN_LOCATION, 4450 CL_DRIVER, &handlers, global_dc); 4451 break; 4452 } 4453 } 4454 4455 alloc_switch (); 4456 switches[n_switches].part1 = 0; 4457 } 4458 } 4459 4460 /* Callback for processing %D and %I specs. */ 4461 4462 struct spec_path_info { 4463 const char *option; 4464 const char *append; 4465 size_t append_len; 4466 bool omit_relative; 4467 bool separate_options; 4468 }; 4469 4470 static void * 4471 spec_path (char *path, void *data) 4472 { 4473 struct spec_path_info *info = (struct spec_path_info *) data; 4474 size_t len = 0; 4475 char save = 0; 4476 4477 if (info->omit_relative && !IS_ABSOLUTE_PATH (path)) 4478 return NULL; 4479 4480 if (info->append_len != 0) 4481 { 4482 len = strlen (path); 4483 memcpy (path + len, info->append, info->append_len + 1); 4484 } 4485 4486 if (!is_directory (path, true)) 4487 return NULL; 4488 4489 do_spec_1 (info->option, 1, NULL); 4490 if (info->separate_options) 4491 do_spec_1 (" ", 0, NULL); 4492 4493 if (info->append_len == 0) 4494 { 4495 len = strlen (path); 4496 save = path[len - 1]; 4497 if (IS_DIR_SEPARATOR (path[len - 1])) 4498 path[len - 1] = '\0'; 4499 } 4500 4501 do_spec_1 (path, 1, NULL); 4502 do_spec_1 (" ", 0, NULL); 4503 4504 /* Must not damage the original path. */ 4505 if (info->append_len == 0) 4506 path[len - 1] = save; 4507 4508 return NULL; 4509 } 4510 4511 /* Create a temporary FILE with the contents of ARGV. Add @FILE to the 4512 argument list. */ 4513 4514 static void 4515 create_at_file (char **argv) 4516 { 4517 char *temp_file = make_temp_file (""); 4518 char *at_argument = concat ("@", temp_file, NULL); 4519 FILE *f = fopen (temp_file, "w"); 4520 int status; 4521 4522 if (f == NULL) 4523 fatal_error ("could not open temporary response file %s", 4524 temp_file); 4525 4526 status = writeargv (argv, f); 4527 4528 if (status) 4529 fatal_error ("could not write to temporary response file %s", 4530 temp_file); 4531 4532 status = fclose (f); 4533 4534 if (EOF == status) 4535 fatal_error ("could not close temporary response file %s", 4536 temp_file); 4537 4538 store_arg (at_argument, 0, 0); 4539 4540 record_temp_file (temp_file, !save_temps_flag, !save_temps_flag); 4541 } 4542 4543 /* True if we should compile INFILE. */ 4544 4545 static bool 4546 compile_input_file_p (struct infile *infile) 4547 { 4548 if ((!infile->language) || (infile->language[0] != '*')) 4549 if (infile->incompiler == input_file_compiler) 4550 return true; 4551 return false; 4552 } 4553 4554 /* Process each member of VEC as a spec. */ 4555 4556 static void 4557 do_specs_vec (vec<char_p> vec) 4558 { 4559 unsigned ix; 4560 char *opt; 4561 4562 FOR_EACH_VEC_ELT (vec, ix, opt) 4563 { 4564 do_spec_1 (opt, 1, NULL); 4565 /* Make each accumulated option a separate argument. */ 4566 do_spec_1 (" ", 0, NULL); 4567 } 4568 } 4569 4570 /* Process the sub-spec SPEC as a portion of a larger spec. 4571 This is like processing a whole spec except that we do 4572 not initialize at the beginning and we do not supply a 4573 newline by default at the end. 4574 INSWITCH nonzero means don't process %-sequences in SPEC; 4575 in this case, % is treated as an ordinary character. 4576 This is used while substituting switches. 4577 INSWITCH nonzero also causes SPC not to terminate an argument. 4578 4579 Value is zero unless a line was finished 4580 and the command on that line reported an error. */ 4581 4582 static int 4583 do_spec_1 (const char *spec, int inswitch, const char *soft_matched_part) 4584 { 4585 const char *p = spec; 4586 int c; 4587 int i; 4588 int value; 4589 4590 /* If it's an empty string argument to a switch, keep it as is. */ 4591 if (inswitch && !*p) 4592 arg_going = 1; 4593 4594 while ((c = *p++)) 4595 /* If substituting a switch, treat all chars like letters. 4596 Otherwise, NL, SPC, TAB and % are special. */ 4597 switch (inswitch ? 'a' : c) 4598 { 4599 case '\n': 4600 end_going_arg (); 4601 4602 if (argbuf.length () > 0 4603 && !strcmp (argbuf.last (), "|")) 4604 { 4605 /* A `|' before the newline means use a pipe here, 4606 but only if -pipe was specified. 4607 Otherwise, execute now and don't pass the `|' as an arg. */ 4608 if (use_pipes) 4609 { 4610 input_from_pipe = 1; 4611 break; 4612 } 4613 else 4614 argbuf.pop (); 4615 } 4616 4617 set_collect_gcc_options (); 4618 4619 if (argbuf.length () > 0) 4620 { 4621 value = execute (); 4622 if (value) 4623 return value; 4624 } 4625 /* Reinitialize for a new command, and for a new argument. */ 4626 clear_args (); 4627 arg_going = 0; 4628 delete_this_arg = 0; 4629 this_is_output_file = 0; 4630 this_is_library_file = 0; 4631 this_is_linker_script = 0; 4632 input_from_pipe = 0; 4633 break; 4634 4635 case '|': 4636 end_going_arg (); 4637 4638 /* Use pipe */ 4639 obstack_1grow (&obstack, c); 4640 arg_going = 1; 4641 break; 4642 4643 case '\t': 4644 case ' ': 4645 end_going_arg (); 4646 4647 /* Reinitialize for a new argument. */ 4648 delete_this_arg = 0; 4649 this_is_output_file = 0; 4650 this_is_library_file = 0; 4651 this_is_linker_script = 0; 4652 break; 4653 4654 case '%': 4655 switch (c = *p++) 4656 { 4657 case 0: 4658 fatal_error ("spec %qs invalid", spec); 4659 4660 case 'b': 4661 if (save_temps_length) 4662 obstack_grow (&obstack, save_temps_prefix, save_temps_length); 4663 else 4664 obstack_grow (&obstack, input_basename, basename_length); 4665 if (compare_debug < 0) 4666 obstack_grow (&obstack, ".gk", 3); 4667 arg_going = 1; 4668 break; 4669 4670 case 'B': 4671 if (save_temps_length) 4672 obstack_grow (&obstack, save_temps_prefix, save_temps_length); 4673 else 4674 obstack_grow (&obstack, input_basename, suffixed_basename_length); 4675 if (compare_debug < 0) 4676 obstack_grow (&obstack, ".gk", 3); 4677 arg_going = 1; 4678 break; 4679 4680 case 'd': 4681 delete_this_arg = 2; 4682 break; 4683 4684 /* Dump out the directories specified with LIBRARY_PATH, 4685 followed by the absolute directories 4686 that we search for startfiles. */ 4687 case 'D': 4688 { 4689 struct spec_path_info info; 4690 4691 info.option = "-L"; 4692 info.append_len = 0; 4693 #ifdef RELATIVE_PREFIX_NOT_LINKDIR 4694 /* Used on systems which record the specified -L dirs 4695 and use them to search for dynamic linking. 4696 Relative directories always come from -B, 4697 and it is better not to use them for searching 4698 at run time. In particular, stage1 loses. */ 4699 info.omit_relative = true; 4700 #else 4701 info.omit_relative = false; 4702 #endif 4703 info.separate_options = false; 4704 4705 for_each_path (&startfile_prefixes, true, 0, spec_path, &info); 4706 } 4707 break; 4708 4709 case 'e': 4710 /* %efoo means report an error with `foo' as error message 4711 and don't execute any more commands for this file. */ 4712 { 4713 const char *q = p; 4714 char *buf; 4715 while (*p != 0 && *p != '\n') 4716 p++; 4717 buf = (char *) alloca (p - q + 1); 4718 strncpy (buf, q, p - q); 4719 buf[p - q] = 0; 4720 error ("%s", _(buf)); 4721 return -1; 4722 } 4723 break; 4724 case 'n': 4725 /* %nfoo means report a notice with `foo' on stderr. */ 4726 { 4727 const char *q = p; 4728 char *buf; 4729 while (*p != 0 && *p != '\n') 4730 p++; 4731 buf = (char *) alloca (p - q + 1); 4732 strncpy (buf, q, p - q); 4733 buf[p - q] = 0; 4734 inform (0, "%s", _(buf)); 4735 if (*p) 4736 p++; 4737 } 4738 break; 4739 4740 case 'j': 4741 { 4742 struct stat st; 4743 4744 /* If save_temps_flag is off, and the HOST_BIT_BUCKET is 4745 defined, and it is not a directory, and it is 4746 writable, use it. Otherwise, treat this like any 4747 other temporary file. */ 4748 4749 if ((!save_temps_flag) 4750 && (stat (HOST_BIT_BUCKET, &st) == 0) && (!S_ISDIR (st.st_mode)) 4751 && (access (HOST_BIT_BUCKET, W_OK) == 0)) 4752 { 4753 obstack_grow (&obstack, HOST_BIT_BUCKET, 4754 strlen (HOST_BIT_BUCKET)); 4755 delete_this_arg = 0; 4756 arg_going = 1; 4757 break; 4758 } 4759 } 4760 goto create_temp_file; 4761 case '|': 4762 if (use_pipes) 4763 { 4764 obstack_1grow (&obstack, '-'); 4765 delete_this_arg = 0; 4766 arg_going = 1; 4767 4768 /* consume suffix */ 4769 while (*p == '.' || ISALNUM ((unsigned char) *p)) 4770 p++; 4771 if (p[0] == '%' && p[1] == 'O') 4772 p += 2; 4773 4774 break; 4775 } 4776 goto create_temp_file; 4777 case 'm': 4778 if (use_pipes) 4779 { 4780 /* consume suffix */ 4781 while (*p == '.' || ISALNUM ((unsigned char) *p)) 4782 p++; 4783 if (p[0] == '%' && p[1] == 'O') 4784 p += 2; 4785 4786 break; 4787 } 4788 goto create_temp_file; 4789 case 'g': 4790 case 'u': 4791 case 'U': 4792 create_temp_file: 4793 { 4794 struct temp_name *t; 4795 int suffix_length; 4796 const char *suffix = p; 4797 char *saved_suffix = NULL; 4798 4799 while (*p == '.' || ISALNUM ((unsigned char) *p)) 4800 p++; 4801 suffix_length = p - suffix; 4802 if (p[0] == '%' && p[1] == 'O') 4803 { 4804 p += 2; 4805 /* We don't support extra suffix characters after %O. */ 4806 if (*p == '.' || ISALNUM ((unsigned char) *p)) 4807 fatal_error ("spec %qs has invalid %<%%0%c%>", spec, *p); 4808 if (suffix_length == 0) 4809 suffix = TARGET_OBJECT_SUFFIX; 4810 else 4811 { 4812 saved_suffix 4813 = XNEWVEC (char, suffix_length 4814 + strlen (TARGET_OBJECT_SUFFIX)); 4815 strncpy (saved_suffix, suffix, suffix_length); 4816 strcpy (saved_suffix + suffix_length, 4817 TARGET_OBJECT_SUFFIX); 4818 } 4819 suffix_length += strlen (TARGET_OBJECT_SUFFIX); 4820 } 4821 4822 if (compare_debug < 0) 4823 { 4824 suffix = concat (".gk", suffix, NULL); 4825 suffix_length += 3; 4826 } 4827 4828 /* If -save-temps=obj and -o were specified, use that for the 4829 temp file. */ 4830 if (save_temps_length) 4831 { 4832 char *tmp; 4833 temp_filename_length 4834 = save_temps_length + suffix_length + 1; 4835 tmp = (char *) alloca (temp_filename_length); 4836 memcpy (tmp, save_temps_prefix, save_temps_length); 4837 memcpy (tmp + save_temps_length, suffix, suffix_length); 4838 tmp[save_temps_length + suffix_length] = '\0'; 4839 temp_filename = save_string (tmp, save_temps_length 4840 + suffix_length); 4841 obstack_grow (&obstack, temp_filename, 4842 temp_filename_length); 4843 arg_going = 1; 4844 delete_this_arg = 0; 4845 break; 4846 } 4847 4848 /* If the gcc_input_filename has the same suffix specified 4849 for the %g, %u, or %U, and -save-temps is specified, 4850 we could end up using that file as an intermediate 4851 thus clobbering the user's source file (.e.g., 4852 gcc -save-temps foo.s would clobber foo.s with the 4853 output of cpp0). So check for this condition and 4854 generate a temp file as the intermediate. */ 4855 4856 if (save_temps_flag) 4857 { 4858 char *tmp; 4859 temp_filename_length = basename_length + suffix_length + 1; 4860 tmp = (char *) alloca (temp_filename_length); 4861 memcpy (tmp, input_basename, basename_length); 4862 memcpy (tmp + basename_length, suffix, suffix_length); 4863 tmp[basename_length + suffix_length] = '\0'; 4864 temp_filename = tmp; 4865 4866 if (filename_cmp (temp_filename, gcc_input_filename) != 0) 4867 { 4868 #ifndef HOST_LACKS_INODE_NUMBERS 4869 struct stat st_temp; 4870 4871 /* Note, set_input() resets input_stat_set to 0. */ 4872 if (input_stat_set == 0) 4873 { 4874 input_stat_set = stat (gcc_input_filename, 4875 &input_stat); 4876 if (input_stat_set >= 0) 4877 input_stat_set = 1; 4878 } 4879 4880 /* If we have the stat for the gcc_input_filename 4881 and we can do the stat for the temp_filename 4882 then the they could still refer to the same 4883 file if st_dev/st_ino's are the same. */ 4884 if (input_stat_set != 1 4885 || stat (temp_filename, &st_temp) < 0 4886 || input_stat.st_dev != st_temp.st_dev 4887 || input_stat.st_ino != st_temp.st_ino) 4888 #else 4889 /* Just compare canonical pathnames. */ 4890 char* input_realname = lrealpath (gcc_input_filename); 4891 char* temp_realname = lrealpath (temp_filename); 4892 bool files_differ = filename_cmp (input_realname, temp_realname); 4893 free (input_realname); 4894 free (temp_realname); 4895 if (files_differ) 4896 #endif 4897 { 4898 temp_filename = save_string (temp_filename, 4899 temp_filename_length + 1); 4900 obstack_grow (&obstack, temp_filename, 4901 temp_filename_length); 4902 arg_going = 1; 4903 delete_this_arg = 0; 4904 break; 4905 } 4906 } 4907 } 4908 4909 /* See if we already have an association of %g/%u/%U and 4910 suffix. */ 4911 for (t = temp_names; t; t = t->next) 4912 if (t->length == suffix_length 4913 && strncmp (t->suffix, suffix, suffix_length) == 0 4914 && t->unique == (c == 'u' || c == 'U' || c == 'j')) 4915 break; 4916 4917 /* Make a new association if needed. %u and %j 4918 require one. */ 4919 if (t == 0 || c == 'u' || c == 'j') 4920 { 4921 if (t == 0) 4922 { 4923 t = XNEW (struct temp_name); 4924 t->next = temp_names; 4925 temp_names = t; 4926 } 4927 t->length = suffix_length; 4928 if (saved_suffix) 4929 { 4930 t->suffix = saved_suffix; 4931 saved_suffix = NULL; 4932 } 4933 else 4934 t->suffix = save_string (suffix, suffix_length); 4935 t->unique = (c == 'u' || c == 'U' || c == 'j'); 4936 temp_filename = make_temp_file (t->suffix); 4937 temp_filename_length = strlen (temp_filename); 4938 t->filename = temp_filename; 4939 t->filename_length = temp_filename_length; 4940 } 4941 4942 free (saved_suffix); 4943 4944 obstack_grow (&obstack, t->filename, t->filename_length); 4945 delete_this_arg = 1; 4946 } 4947 arg_going = 1; 4948 break; 4949 4950 case 'i': 4951 if (combine_inputs) 4952 { 4953 if (at_file_supplied) 4954 { 4955 /* We are going to expand `%i' to `@FILE', where FILE 4956 is a newly-created temporary filename. The filenames 4957 that would usually be expanded in place of %o will be 4958 written to the temporary file. */ 4959 char **argv; 4960 int n_files = 0; 4961 int j; 4962 4963 for (i = 0; i < n_infiles; i++) 4964 if (compile_input_file_p (&infiles[i])) 4965 n_files++; 4966 4967 argv = (char **) alloca (sizeof (char *) * (n_files + 1)); 4968 4969 /* Copy the strings over. */ 4970 for (i = 0, j = 0; i < n_infiles; i++) 4971 if (compile_input_file_p (&infiles[i])) 4972 { 4973 argv[j] = CONST_CAST (char *, infiles[i].name); 4974 infiles[i].compiled = true; 4975 j++; 4976 } 4977 argv[j] = NULL; 4978 4979 create_at_file (argv); 4980 } 4981 else 4982 for (i = 0; (int) i < n_infiles; i++) 4983 if (compile_input_file_p (&infiles[i])) 4984 { 4985 store_arg (infiles[i].name, 0, 0); 4986 infiles[i].compiled = true; 4987 } 4988 } 4989 else 4990 { 4991 obstack_grow (&obstack, gcc_input_filename, 4992 input_filename_length); 4993 arg_going = 1; 4994 } 4995 break; 4996 4997 case 'I': 4998 { 4999 struct spec_path_info info; 5000 5001 if (multilib_dir) 5002 { 5003 do_spec_1 ("-imultilib", 1, NULL); 5004 /* Make this a separate argument. */ 5005 do_spec_1 (" ", 0, NULL); 5006 do_spec_1 (multilib_dir, 1, NULL); 5007 do_spec_1 (" ", 0, NULL); 5008 } 5009 5010 if (multiarch_dir) 5011 { 5012 do_spec_1 ("-imultiarch", 1, NULL); 5013 /* Make this a separate argument. */ 5014 do_spec_1 (" ", 0, NULL); 5015 do_spec_1 (multiarch_dir, 1, NULL); 5016 do_spec_1 (" ", 0, NULL); 5017 } 5018 5019 if (gcc_exec_prefix) 5020 { 5021 do_spec_1 ("-iprefix", 1, NULL); 5022 /* Make this a separate argument. */ 5023 do_spec_1 (" ", 0, NULL); 5024 do_spec_1 (gcc_exec_prefix, 1, NULL); 5025 do_spec_1 (" ", 0, NULL); 5026 } 5027 5028 if (target_system_root_changed || 5029 (target_system_root && target_sysroot_hdrs_suffix)) 5030 { 5031 do_spec_1 ("-isysroot", 1, NULL); 5032 /* Make this a separate argument. */ 5033 do_spec_1 (" ", 0, NULL); 5034 do_spec_1 (target_system_root, 1, NULL); 5035 if (target_sysroot_hdrs_suffix) 5036 do_spec_1 (target_sysroot_hdrs_suffix, 1, NULL); 5037 do_spec_1 (" ", 0, NULL); 5038 } 5039 5040 info.option = "-isystem"; 5041 info.append = "include"; 5042 info.append_len = strlen (info.append); 5043 info.omit_relative = false; 5044 info.separate_options = true; 5045 5046 for_each_path (&include_prefixes, false, info.append_len, 5047 spec_path, &info); 5048 5049 info.append = "include-fixed"; 5050 if (*sysroot_hdrs_suffix_spec) 5051 info.append = concat (info.append, dir_separator_str, 5052 multilib_dir, NULL); 5053 info.append_len = strlen (info.append); 5054 for_each_path (&include_prefixes, false, info.append_len, 5055 spec_path, &info); 5056 } 5057 break; 5058 5059 case 'o': 5060 { 5061 int max = n_infiles; 5062 max += lang_specific_extra_outfiles; 5063 5064 if (HAVE_GNU_LD && at_file_supplied) 5065 { 5066 /* We are going to expand `%o' to `@FILE', where FILE 5067 is a newly-created temporary filename. The filenames 5068 that would usually be expanded in place of %o will be 5069 written to the temporary file. */ 5070 5071 char **argv; 5072 int n_files, j; 5073 5074 /* Convert OUTFILES into a form suitable for writeargv. */ 5075 5076 /* Determine how many are non-NULL. */ 5077 for (n_files = 0, i = 0; i < max; i++) 5078 n_files += outfiles[i] != NULL; 5079 5080 argv = (char **) alloca (sizeof (char *) * (n_files + 1)); 5081 5082 /* Copy the strings over. */ 5083 for (i = 0, j = 0; i < max; i++) 5084 if (outfiles[i]) 5085 { 5086 argv[j] = CONST_CAST (char *, outfiles[i]); 5087 j++; 5088 } 5089 argv[j] = NULL; 5090 5091 create_at_file (argv); 5092 } 5093 else 5094 for (i = 0; i < max; i++) 5095 if (outfiles[i]) 5096 store_arg (outfiles[i], 0, 0); 5097 break; 5098 } 5099 5100 case 'O': 5101 obstack_grow (&obstack, TARGET_OBJECT_SUFFIX, strlen (TARGET_OBJECT_SUFFIX)); 5102 arg_going = 1; 5103 break; 5104 5105 case 's': 5106 this_is_library_file = 1; 5107 break; 5108 5109 case 'T': 5110 this_is_linker_script = 1; 5111 break; 5112 5113 case 'V': 5114 outfiles[input_file_number] = NULL; 5115 break; 5116 5117 case 'w': 5118 this_is_output_file = 1; 5119 break; 5120 5121 case 'W': 5122 { 5123 unsigned int cur_index = argbuf.length (); 5124 /* Handle the {...} following the %W. */ 5125 if (*p != '{') 5126 fatal_error ("spec %qs has invalid %<%%W%c%>", spec, *p); 5127 p = handle_braces (p + 1); 5128 if (p == 0) 5129 return -1; 5130 end_going_arg (); 5131 /* If any args were output, mark the last one for deletion 5132 on failure. */ 5133 if (argbuf.length () != cur_index) 5134 record_temp_file (argbuf.last (), 0, 1); 5135 break; 5136 } 5137 5138 /* %x{OPTION} records OPTION for %X to output. */ 5139 case 'x': 5140 { 5141 const char *p1 = p; 5142 char *string; 5143 char *opt; 5144 unsigned ix; 5145 5146 /* Skip past the option value and make a copy. */ 5147 if (*p != '{') 5148 fatal_error ("spec %qs has invalid %<%%x%c%>", spec, *p); 5149 while (*p++ != '}') 5150 ; 5151 string = save_string (p1 + 1, p - p1 - 2); 5152 5153 /* See if we already recorded this option. */ 5154 FOR_EACH_VEC_ELT (linker_options, ix, opt) 5155 if (! strcmp (string, opt)) 5156 { 5157 free (string); 5158 return 0; 5159 } 5160 5161 /* This option is new; add it. */ 5162 add_linker_option (string, strlen (string)); 5163 free (string); 5164 } 5165 break; 5166 5167 /* Dump out the options accumulated previously using %x. */ 5168 case 'X': 5169 do_specs_vec (linker_options); 5170 break; 5171 5172 /* Dump out the options accumulated previously using -Wa,. */ 5173 case 'Y': 5174 do_specs_vec (assembler_options); 5175 break; 5176 5177 /* Dump out the options accumulated previously using -Wp,. */ 5178 case 'Z': 5179 do_specs_vec (preprocessor_options); 5180 break; 5181 5182 /* Here are digits and numbers that just process 5183 a certain constant string as a spec. */ 5184 5185 case '1': 5186 value = do_spec_1 (cc1_spec, 0, NULL); 5187 if (value != 0) 5188 return value; 5189 break; 5190 5191 case '2': 5192 value = do_spec_1 (cc1plus_spec, 0, NULL); 5193 if (value != 0) 5194 return value; 5195 break; 5196 5197 case 'a': 5198 value = do_spec_1 (asm_spec, 0, NULL); 5199 if (value != 0) 5200 return value; 5201 break; 5202 5203 case 'A': 5204 value = do_spec_1 (asm_final_spec, 0, NULL); 5205 if (value != 0) 5206 return value; 5207 break; 5208 5209 case 'C': 5210 { 5211 const char *const spec 5212 = (input_file_compiler->cpp_spec 5213 ? input_file_compiler->cpp_spec 5214 : cpp_spec); 5215 value = do_spec_1 (spec, 0, NULL); 5216 if (value != 0) 5217 return value; 5218 } 5219 break; 5220 5221 case 'E': 5222 value = do_spec_1 (endfile_spec, 0, NULL); 5223 if (value != 0) 5224 return value; 5225 break; 5226 5227 case 'l': 5228 value = do_spec_1 (link_spec, 0, NULL); 5229 if (value != 0) 5230 return value; 5231 break; 5232 5233 case 'L': 5234 value = do_spec_1 (lib_spec, 0, NULL); 5235 if (value != 0) 5236 return value; 5237 break; 5238 5239 case 'M': 5240 if (multilib_os_dir == NULL) 5241 obstack_1grow (&obstack, '.'); 5242 else 5243 obstack_grow (&obstack, multilib_os_dir, 5244 strlen (multilib_os_dir)); 5245 break; 5246 5247 case 'G': 5248 value = do_spec_1 (libgcc_spec, 0, NULL); 5249 if (value != 0) 5250 return value; 5251 break; 5252 5253 case 'R': 5254 /* We assume there is a directory 5255 separator at the end of this string. */ 5256 if (target_system_root) 5257 { 5258 obstack_grow (&obstack, target_system_root, 5259 strlen (target_system_root)); 5260 if (target_sysroot_suffix) 5261 obstack_grow (&obstack, target_sysroot_suffix, 5262 strlen (target_sysroot_suffix)); 5263 } 5264 break; 5265 5266 case 'S': 5267 value = do_spec_1 (startfile_spec, 0, NULL); 5268 if (value != 0) 5269 return value; 5270 break; 5271 5272 /* Here we define characters other than letters and digits. */ 5273 5274 case '{': 5275 p = handle_braces (p); 5276 if (p == 0) 5277 return -1; 5278 break; 5279 5280 case ':': 5281 p = handle_spec_function (p); 5282 if (p == 0) 5283 return -1; 5284 break; 5285 5286 case '%': 5287 obstack_1grow (&obstack, '%'); 5288 break; 5289 5290 case '.': 5291 { 5292 unsigned len = 0; 5293 5294 while (p[len] && p[len] != ' ' && p[len] != '%') 5295 len++; 5296 suffix_subst = save_string (p - 1, len + 1); 5297 p += len; 5298 } 5299 break; 5300 5301 /* Henceforth ignore the option(s) matching the pattern 5302 after the %<. */ 5303 case '<': 5304 case '>': 5305 { 5306 unsigned len = 0; 5307 int have_wildcard = 0; 5308 int i; 5309 int switch_option; 5310 5311 if (c == '>') 5312 switch_option = SWITCH_IGNORE | SWITCH_KEEP_FOR_GCC; 5313 else 5314 switch_option = SWITCH_IGNORE; 5315 5316 while (p[len] && p[len] != ' ' && p[len] != '\t') 5317 len++; 5318 5319 if (p[len-1] == '*') 5320 have_wildcard = 1; 5321 5322 for (i = 0; i < n_switches; i++) 5323 if (!strncmp (switches[i].part1, p, len - have_wildcard) 5324 && (have_wildcard || switches[i].part1[len] == '\0')) 5325 { 5326 switches[i].live_cond |= switch_option; 5327 /* User switch be validated from validate_all_switches. 5328 when the definition is seen from the spec file. 5329 If not defined anywhere, will be rejected. */ 5330 if (switches[i].known) 5331 switches[i].validated = true; 5332 } 5333 5334 p += len; 5335 } 5336 break; 5337 5338 case '*': 5339 if (soft_matched_part) 5340 { 5341 if (soft_matched_part[0]) 5342 do_spec_1 (soft_matched_part, 1, NULL); 5343 do_spec_1 (" ", 0, NULL); 5344 } 5345 else 5346 /* Catch the case where a spec string contains something like 5347 '%{foo:%*}'. i.e. there is no * in the pattern on the left 5348 hand side of the :. */ 5349 error ("spec failure: %<%%*%> has not been initialized by pattern match"); 5350 break; 5351 5352 /* Process a string found as the value of a spec given by name. 5353 This feature allows individual machine descriptions 5354 to add and use their own specs. */ 5355 case '(': 5356 { 5357 const char *name = p; 5358 struct spec_list *sl; 5359 int len; 5360 5361 /* The string after the S/P is the name of a spec that is to be 5362 processed. */ 5363 while (*p && *p != ')') 5364 p++; 5365 5366 /* See if it's in the list. */ 5367 for (len = p - name, sl = specs; sl; sl = sl->next) 5368 if (sl->name_len == len && !strncmp (sl->name, name, len)) 5369 { 5370 name = *(sl->ptr_spec); 5371 #ifdef DEBUG_SPECS 5372 fnotice (stderr, "Processing spec (%s), which is '%s'\n", 5373 sl->name, name); 5374 #endif 5375 break; 5376 } 5377 5378 if (sl) 5379 { 5380 value = do_spec_1 (name, 0, NULL); 5381 if (value != 0) 5382 return value; 5383 } 5384 5385 /* Discard the closing paren. */ 5386 if (*p) 5387 p++; 5388 } 5389 break; 5390 5391 default: 5392 error ("spec failure: unrecognized spec option %qc", c); 5393 break; 5394 } 5395 break; 5396 5397 case '\\': 5398 /* Backslash: treat next character as ordinary. */ 5399 c = *p++; 5400 5401 /* Fall through. */ 5402 default: 5403 /* Ordinary character: put it into the current argument. */ 5404 obstack_1grow (&obstack, c); 5405 arg_going = 1; 5406 } 5407 5408 /* End of string. If we are processing a spec function, we need to 5409 end any pending argument. */ 5410 if (processing_spec_function) 5411 end_going_arg (); 5412 5413 return 0; 5414 } 5415 5416 /* Look up a spec function. */ 5417 5418 static const struct spec_function * 5419 lookup_spec_function (const char *name) 5420 { 5421 const struct spec_function *sf; 5422 5423 for (sf = static_spec_functions; sf->name != NULL; sf++) 5424 if (strcmp (sf->name, name) == 0) 5425 return sf; 5426 5427 return NULL; 5428 } 5429 5430 /* Evaluate a spec function. */ 5431 5432 static const char * 5433 eval_spec_function (const char *func, const char *args) 5434 { 5435 const struct spec_function *sf; 5436 const char *funcval; 5437 5438 /* Saved spec processing context. */ 5439 vec<const_char_p> save_argbuf; 5440 5441 int save_arg_going; 5442 int save_delete_this_arg; 5443 int save_this_is_output_file; 5444 int save_this_is_library_file; 5445 int save_input_from_pipe; 5446 int save_this_is_linker_script; 5447 const char *save_suffix_subst; 5448 5449 int save_growing_size; 5450 void *save_growing_value = NULL; 5451 5452 sf = lookup_spec_function (func); 5453 if (sf == NULL) 5454 fatal_error ("unknown spec function %qs", func); 5455 5456 /* Push the spec processing context. */ 5457 save_argbuf = argbuf; 5458 5459 save_arg_going = arg_going; 5460 save_delete_this_arg = delete_this_arg; 5461 save_this_is_output_file = this_is_output_file; 5462 save_this_is_library_file = this_is_library_file; 5463 save_this_is_linker_script = this_is_linker_script; 5464 save_input_from_pipe = input_from_pipe; 5465 save_suffix_subst = suffix_subst; 5466 5467 /* If we have some object growing now, finalize it so the args and function 5468 eval proceed from a cleared context. This is needed to prevent the first 5469 constructed arg from mistakenly including the growing value. We'll push 5470 this value back on the obstack once the function evaluation is done, to 5471 restore a consistent processing context for our caller. This is fine as 5472 the address of growing objects isn't guaranteed to remain stable until 5473 they are finalized, and we expect this situation to be rare enough for 5474 the extra copy not to be an issue. */ 5475 save_growing_size = obstack_object_size (&obstack); 5476 if (save_growing_size > 0) 5477 save_growing_value = obstack_finish (&obstack); 5478 5479 /* Create a new spec processing context, and build the function 5480 arguments. */ 5481 5482 alloc_args (); 5483 if (do_spec_2 (args) < 0) 5484 fatal_error ("error in args to spec function %qs", func); 5485 5486 /* argbuf_index is an index for the next argument to be inserted, and 5487 so contains the count of the args already inserted. */ 5488 5489 funcval = (*sf->func) (argbuf.length (), 5490 argbuf.address ()); 5491 5492 /* Pop the spec processing context. */ 5493 argbuf.release (); 5494 argbuf = save_argbuf; 5495 5496 arg_going = save_arg_going; 5497 delete_this_arg = save_delete_this_arg; 5498 this_is_output_file = save_this_is_output_file; 5499 this_is_library_file = save_this_is_library_file; 5500 this_is_linker_script = save_this_is_linker_script; 5501 input_from_pipe = save_input_from_pipe; 5502 suffix_subst = save_suffix_subst; 5503 5504 if (save_growing_size > 0) 5505 obstack_grow (&obstack, save_growing_value, save_growing_size); 5506 5507 return funcval; 5508 } 5509 5510 /* Handle a spec function call of the form: 5511 5512 %:function(args) 5513 5514 ARGS is processed as a spec in a separate context and split into an 5515 argument vector in the normal fashion. The function returns a string 5516 containing a spec which we then process in the caller's context, or 5517 NULL if no processing is required. */ 5518 5519 static const char * 5520 handle_spec_function (const char *p) 5521 { 5522 char *func, *args; 5523 const char *endp, *funcval; 5524 int count; 5525 5526 processing_spec_function++; 5527 5528 /* Get the function name. */ 5529 for (endp = p; *endp != '\0'; endp++) 5530 { 5531 if (*endp == '(') /* ) */ 5532 break; 5533 /* Only allow [A-Za-z0-9], -, and _ in function names. */ 5534 if (!ISALNUM (*endp) && !(*endp == '-' || *endp == '_')) 5535 fatal_error ("malformed spec function name"); 5536 } 5537 if (*endp != '(') /* ) */ 5538 fatal_error ("no arguments for spec function"); 5539 func = save_string (p, endp - p); 5540 p = ++endp; 5541 5542 /* Get the arguments. */ 5543 for (count = 0; *endp != '\0'; endp++) 5544 { 5545 /* ( */ 5546 if (*endp == ')') 5547 { 5548 if (count == 0) 5549 break; 5550 count--; 5551 } 5552 else if (*endp == '(') /* ) */ 5553 count++; 5554 } 5555 /* ( */ 5556 if (*endp != ')') 5557 fatal_error ("malformed spec function arguments"); 5558 args = save_string (p, endp - p); 5559 p = ++endp; 5560 5561 /* p now points to just past the end of the spec function expression. */ 5562 5563 funcval = eval_spec_function (func, args); 5564 if (funcval != NULL && do_spec_1 (funcval, 0, NULL) < 0) 5565 p = NULL; 5566 5567 free (func); 5568 free (args); 5569 5570 processing_spec_function--; 5571 5572 return p; 5573 } 5574 5575 /* Inline subroutine of handle_braces. Returns true if the current 5576 input suffix matches the atom bracketed by ATOM and END_ATOM. */ 5577 static inline bool 5578 input_suffix_matches (const char *atom, const char *end_atom) 5579 { 5580 return (input_suffix 5581 && !strncmp (input_suffix, atom, end_atom - atom) 5582 && input_suffix[end_atom - atom] == '\0'); 5583 } 5584 5585 /* Subroutine of handle_braces. Returns true if the current 5586 input file's spec name matches the atom bracketed by ATOM and END_ATOM. */ 5587 static bool 5588 input_spec_matches (const char *atom, const char *end_atom) 5589 { 5590 return (input_file_compiler 5591 && input_file_compiler->suffix 5592 && input_file_compiler->suffix[0] != '\0' 5593 && !strncmp (input_file_compiler->suffix + 1, atom, 5594 end_atom - atom) 5595 && input_file_compiler->suffix[end_atom - atom + 1] == '\0'); 5596 } 5597 5598 /* Subroutine of handle_braces. Returns true if a switch 5599 matching the atom bracketed by ATOM and END_ATOM appeared on the 5600 command line. */ 5601 static bool 5602 switch_matches (const char *atom, const char *end_atom, int starred) 5603 { 5604 int i; 5605 int len = end_atom - atom; 5606 int plen = starred ? len : -1; 5607 5608 for (i = 0; i < n_switches; i++) 5609 if (!strncmp (switches[i].part1, atom, len) 5610 && (starred || switches[i].part1[len] == '\0') 5611 && check_live_switch (i, plen)) 5612 return true; 5613 5614 /* Check if a switch with separated form matching the atom. 5615 We check -D and -U switches. */ 5616 else if (switches[i].args != 0) 5617 { 5618 if ((*switches[i].part1 == 'D' || *switches[i].part1 == 'U') 5619 && *switches[i].part1 == atom[0]) 5620 { 5621 if (!strncmp (switches[i].args[0], &atom[1], len - 1) 5622 && (starred || (switches[i].part1[1] == '\0' 5623 && switches[i].args[0][len - 1] == '\0')) 5624 && check_live_switch (i, (starred ? 1 : -1))) 5625 return true; 5626 } 5627 } 5628 5629 return false; 5630 } 5631 5632 /* Inline subroutine of handle_braces. Mark all of the switches which 5633 match ATOM (extends to END_ATOM; STARRED indicates whether there 5634 was a star after the atom) for later processing. */ 5635 static inline void 5636 mark_matching_switches (const char *atom, const char *end_atom, int starred) 5637 { 5638 int i; 5639 int len = end_atom - atom; 5640 int plen = starred ? len : -1; 5641 5642 for (i = 0; i < n_switches; i++) 5643 if (!strncmp (switches[i].part1, atom, len) 5644 && (starred || switches[i].part1[len] == '\0') 5645 && check_live_switch (i, plen)) 5646 switches[i].ordering = 1; 5647 } 5648 5649 /* Inline subroutine of handle_braces. Process all the currently 5650 marked switches through give_switch, and clear the marks. */ 5651 static inline void 5652 process_marked_switches (void) 5653 { 5654 int i; 5655 5656 for (i = 0; i < n_switches; i++) 5657 if (switches[i].ordering == 1) 5658 { 5659 switches[i].ordering = 0; 5660 give_switch (i, 0); 5661 } 5662 } 5663 5664 /* Handle a %{ ... } construct. P points just inside the leading {. 5665 Returns a pointer one past the end of the brace block, or 0 5666 if we call do_spec_1 and that returns -1. */ 5667 5668 static const char * 5669 handle_braces (const char *p) 5670 { 5671 const char *atom, *end_atom; 5672 const char *d_atom = NULL, *d_end_atom = NULL; 5673 const char *orig = p; 5674 5675 bool a_is_suffix; 5676 bool a_is_spectype; 5677 bool a_is_starred; 5678 bool a_is_negated; 5679 bool a_matched; 5680 5681 bool a_must_be_last = false; 5682 bool ordered_set = false; 5683 bool disjunct_set = false; 5684 bool disj_matched = false; 5685 bool disj_starred = true; 5686 bool n_way_choice = false; 5687 bool n_way_matched = false; 5688 5689 #define SKIP_WHITE() do { while (*p == ' ' || *p == '\t') p++; } while (0) 5690 5691 do 5692 { 5693 if (a_must_be_last) 5694 goto invalid; 5695 5696 /* Scan one "atom" (S in the description above of %{}, possibly 5697 with '!', '.', '@', ',', or '*' modifiers). */ 5698 a_matched = false; 5699 a_is_suffix = false; 5700 a_is_starred = false; 5701 a_is_negated = false; 5702 a_is_spectype = false; 5703 5704 SKIP_WHITE(); 5705 if (*p == '!') 5706 p++, a_is_negated = true; 5707 5708 SKIP_WHITE(); 5709 if (*p == '.') 5710 p++, a_is_suffix = true; 5711 else if (*p == ',') 5712 p++, a_is_spectype = true; 5713 5714 atom = p; 5715 while (ISIDNUM(*p) || *p == '-' || *p == '+' || *p == '=' 5716 || *p == ',' || *p == '.' || *p == '@') 5717 p++; 5718 end_atom = p; 5719 5720 if (*p == '*') 5721 p++, a_is_starred = 1; 5722 5723 SKIP_WHITE(); 5724 switch (*p) 5725 { 5726 case '&': case '}': 5727 /* Substitute the switch(es) indicated by the current atom. */ 5728 ordered_set = true; 5729 if (disjunct_set || n_way_choice || a_is_negated || a_is_suffix 5730 || a_is_spectype || atom == end_atom) 5731 goto invalid; 5732 5733 mark_matching_switches (atom, end_atom, a_is_starred); 5734 5735 if (*p == '}') 5736 process_marked_switches (); 5737 break; 5738 5739 case '|': case ':': 5740 /* Substitute some text if the current atom appears as a switch 5741 or suffix. */ 5742 disjunct_set = true; 5743 if (ordered_set) 5744 goto invalid; 5745 5746 if (atom == end_atom) 5747 { 5748 if (!n_way_choice || disj_matched || *p == '|' 5749 || a_is_negated || a_is_suffix || a_is_spectype 5750 || a_is_starred) 5751 goto invalid; 5752 5753 /* An empty term may appear as the last choice of an 5754 N-way choice set; it means "otherwise". */ 5755 a_must_be_last = true; 5756 disj_matched = !n_way_matched; 5757 disj_starred = false; 5758 } 5759 else 5760 { 5761 if ((a_is_suffix || a_is_spectype) && a_is_starred) 5762 goto invalid; 5763 5764 if (!a_is_starred) 5765 disj_starred = false; 5766 5767 /* Don't bother testing this atom if we already have a 5768 match. */ 5769 if (!disj_matched && !n_way_matched) 5770 { 5771 if (a_is_suffix) 5772 a_matched = input_suffix_matches (atom, end_atom); 5773 else if (a_is_spectype) 5774 a_matched = input_spec_matches (atom, end_atom); 5775 else 5776 a_matched = switch_matches (atom, end_atom, a_is_starred); 5777 5778 if (a_matched != a_is_negated) 5779 { 5780 disj_matched = true; 5781 d_atom = atom; 5782 d_end_atom = end_atom; 5783 } 5784 } 5785 } 5786 5787 if (*p == ':') 5788 { 5789 /* Found the body, that is, the text to substitute if the 5790 current disjunction matches. */ 5791 p = process_brace_body (p + 1, d_atom, d_end_atom, disj_starred, 5792 disj_matched && !n_way_matched); 5793 if (p == 0) 5794 return 0; 5795 5796 /* If we have an N-way choice, reset state for the next 5797 disjunction. */ 5798 if (*p == ';') 5799 { 5800 n_way_choice = true; 5801 n_way_matched |= disj_matched; 5802 disj_matched = false; 5803 disj_starred = true; 5804 d_atom = d_end_atom = NULL; 5805 } 5806 } 5807 break; 5808 5809 default: 5810 goto invalid; 5811 } 5812 } 5813 while (*p++ != '}'); 5814 5815 return p; 5816 5817 invalid: 5818 fatal_error ("braced spec %qs is invalid at %qc", orig, *p); 5819 5820 #undef SKIP_WHITE 5821 } 5822 5823 /* Subroutine of handle_braces. Scan and process a brace substitution body 5824 (X in the description of %{} syntax). P points one past the colon; 5825 ATOM and END_ATOM bracket the first atom which was found to be true 5826 (present) in the current disjunction; STARRED indicates whether all 5827 the atoms in the current disjunction were starred (for syntax validation); 5828 MATCHED indicates whether the disjunction matched or not, and therefore 5829 whether or not the body is to be processed through do_spec_1 or just 5830 skipped. Returns a pointer to the closing } or ;, or 0 if do_spec_1 5831 returns -1. */ 5832 5833 static const char * 5834 process_brace_body (const char *p, const char *atom, const char *end_atom, 5835 int starred, int matched) 5836 { 5837 const char *body, *end_body; 5838 unsigned int nesting_level; 5839 bool have_subst = false; 5840 5841 /* Locate the closing } or ;, honoring nested braces. 5842 Trim trailing whitespace. */ 5843 body = p; 5844 nesting_level = 1; 5845 for (;;) 5846 { 5847 if (*p == '{') 5848 nesting_level++; 5849 else if (*p == '}') 5850 { 5851 if (!--nesting_level) 5852 break; 5853 } 5854 else if (*p == ';' && nesting_level == 1) 5855 break; 5856 else if (*p == '%' && p[1] == '*' && nesting_level == 1) 5857 have_subst = true; 5858 else if (*p == '\0') 5859 goto invalid; 5860 p++; 5861 } 5862 5863 end_body = p; 5864 while (end_body[-1] == ' ' || end_body[-1] == '\t') 5865 end_body--; 5866 5867 if (have_subst && !starred) 5868 goto invalid; 5869 5870 if (matched) 5871 { 5872 /* Copy the substitution body to permanent storage and execute it. 5873 If have_subst is false, this is a simple matter of running the 5874 body through do_spec_1... */ 5875 char *string = save_string (body, end_body - body); 5876 if (!have_subst) 5877 { 5878 if (do_spec_1 (string, 0, NULL) < 0) 5879 return 0; 5880 } 5881 else 5882 { 5883 /* ... but if have_subst is true, we have to process the 5884 body once for each matching switch, with %* set to the 5885 variant part of the switch. */ 5886 unsigned int hard_match_len = end_atom - atom; 5887 int i; 5888 5889 for (i = 0; i < n_switches; i++) 5890 if (!strncmp (switches[i].part1, atom, hard_match_len) 5891 && check_live_switch (i, hard_match_len)) 5892 { 5893 if (do_spec_1 (string, 0, 5894 &switches[i].part1[hard_match_len]) < 0) 5895 return 0; 5896 /* Pass any arguments this switch has. */ 5897 give_switch (i, 1); 5898 suffix_subst = NULL; 5899 } 5900 } 5901 } 5902 5903 return p; 5904 5905 invalid: 5906 fatal_error ("braced spec body %qs is invalid", body); 5907 } 5908 5909 /* Return 0 iff switch number SWITCHNUM is obsoleted by a later switch 5910 on the command line. PREFIX_LENGTH is the length of XXX in an {XXX*} 5911 spec, or -1 if either exact match or %* is used. 5912 5913 A -O switch is obsoleted by a later -O switch. A -f, -g, -m, or -W switch 5914 whose value does not begin with "no-" is obsoleted by the same value 5915 with the "no-", similarly for a switch with the "no-" prefix. */ 5916 5917 static int 5918 check_live_switch (int switchnum, int prefix_length) 5919 { 5920 const char *name = switches[switchnum].part1; 5921 int i; 5922 5923 /* If we already processed this switch and determined if it was 5924 live or not, return our past determination. */ 5925 if (switches[switchnum].live_cond != 0) 5926 return ((switches[switchnum].live_cond & SWITCH_LIVE) != 0 5927 && (switches[switchnum].live_cond & SWITCH_FALSE) == 0 5928 && (switches[switchnum].live_cond & SWITCH_IGNORE_PERMANENTLY) 5929 == 0); 5930 5931 /* In the common case of {<at-most-one-letter>*}, a negating 5932 switch would always match, so ignore that case. We will just 5933 send the conflicting switches to the compiler phase. */ 5934 if (prefix_length >= 0 && prefix_length <= 1) 5935 return 1; 5936 5937 /* Now search for duplicate in a manner that depends on the name. */ 5938 switch (*name) 5939 { 5940 case 'O': 5941 for (i = switchnum + 1; i < n_switches; i++) 5942 if (switches[i].part1[0] == 'O') 5943 { 5944 switches[switchnum].validated = true; 5945 switches[switchnum].live_cond = SWITCH_FALSE; 5946 return 0; 5947 } 5948 break; 5949 5950 case 'W': case 'f': case 'm': case 'g': 5951 if (! strncmp (name + 1, "no-", 3)) 5952 { 5953 /* We have Xno-YYY, search for XYYY. */ 5954 for (i = switchnum + 1; i < n_switches; i++) 5955 if (switches[i].part1[0] == name[0] 5956 && ! strcmp (&switches[i].part1[1], &name[4])) 5957 { 5958 /* --specs are validated with the validate_switches mechanism. */ 5959 if (switches[switchnum].known) 5960 switches[switchnum].validated = true; 5961 switches[switchnum].live_cond = SWITCH_FALSE; 5962 return 0; 5963 } 5964 } 5965 else 5966 { 5967 /* We have XYYY, search for Xno-YYY. */ 5968 for (i = switchnum + 1; i < n_switches; i++) 5969 if (switches[i].part1[0] == name[0] 5970 && switches[i].part1[1] == 'n' 5971 && switches[i].part1[2] == 'o' 5972 && switches[i].part1[3] == '-' 5973 && !strcmp (&switches[i].part1[4], &name[1])) 5974 { 5975 /* --specs are validated with the validate_switches mechanism. */ 5976 if (switches[switchnum].known) 5977 switches[switchnum].validated = true; 5978 switches[switchnum].live_cond = SWITCH_FALSE; 5979 return 0; 5980 } 5981 } 5982 break; 5983 } 5984 5985 /* Otherwise the switch is live. */ 5986 switches[switchnum].live_cond |= SWITCH_LIVE; 5987 return 1; 5988 } 5989 5990 /* Pass a switch to the current accumulating command 5991 in the same form that we received it. 5992 SWITCHNUM identifies the switch; it is an index into 5993 the vector of switches gcc received, which is `switches'. 5994 This cannot fail since it never finishes a command line. 5995 5996 If OMIT_FIRST_WORD is nonzero, then we omit .part1 of the argument. */ 5997 5998 static void 5999 give_switch (int switchnum, int omit_first_word) 6000 { 6001 if ((switches[switchnum].live_cond & SWITCH_IGNORE) != 0) 6002 return; 6003 6004 if (!omit_first_word) 6005 { 6006 do_spec_1 ("-", 0, NULL); 6007 do_spec_1 (switches[switchnum].part1, 1, NULL); 6008 } 6009 6010 if (switches[switchnum].args != 0) 6011 { 6012 const char **p; 6013 for (p = switches[switchnum].args; *p; p++) 6014 { 6015 const char *arg = *p; 6016 6017 do_spec_1 (" ", 0, NULL); 6018 if (suffix_subst) 6019 { 6020 unsigned length = strlen (arg); 6021 int dot = 0; 6022 6023 while (length-- && !IS_DIR_SEPARATOR (arg[length])) 6024 if (arg[length] == '.') 6025 { 6026 (CONST_CAST(char *, arg))[length] = 0; 6027 dot = 1; 6028 break; 6029 } 6030 do_spec_1 (arg, 1, NULL); 6031 if (dot) 6032 (CONST_CAST(char *, arg))[length] = '.'; 6033 do_spec_1 (suffix_subst, 1, NULL); 6034 } 6035 else 6036 do_spec_1 (arg, 1, NULL); 6037 } 6038 } 6039 6040 do_spec_1 (" ", 0, NULL); 6041 switches[switchnum].validated = true; 6042 } 6043 6044 /* Search for a file named NAME trying various prefixes including the 6045 user's -B prefix and some standard ones. 6046 Return the absolute file name found. If nothing is found, return NAME. */ 6047 6048 static const char * 6049 find_file (const char *name) 6050 { 6051 char *newname = find_a_file (&startfile_prefixes, name, R_OK, true); 6052 return newname ? newname : name; 6053 } 6054 6055 /* Determine whether a directory exists. If LINKER, return 0 for 6056 certain fixed names not needed by the linker. */ 6057 6058 static int 6059 is_directory (const char *path1, bool linker) 6060 { 6061 int len1; 6062 char *path; 6063 char *cp; 6064 struct stat st; 6065 6066 /* Ensure the string ends with "/.". The resulting path will be a 6067 directory even if the given path is a symbolic link. */ 6068 len1 = strlen (path1); 6069 path = (char *) alloca (3 + len1); 6070 memcpy (path, path1, len1); 6071 cp = path + len1; 6072 if (!IS_DIR_SEPARATOR (cp[-1])) 6073 *cp++ = DIR_SEPARATOR; 6074 *cp++ = '.'; 6075 *cp = '\0'; 6076 6077 /* Exclude directories that the linker is known to search. */ 6078 if (linker 6079 && IS_DIR_SEPARATOR (path[0]) 6080 && ((cp - path == 6 6081 && filename_ncmp (path + 1, "lib", 3) == 0) 6082 || (cp - path == 10 6083 && filename_ncmp (path + 1, "usr", 3) == 0 6084 && IS_DIR_SEPARATOR (path[4]) 6085 && filename_ncmp (path + 5, "lib", 3) == 0))) 6086 return 0; 6087 6088 return (stat (path, &st) >= 0 && S_ISDIR (st.st_mode)); 6089 } 6090 6091 /* Set up the various global variables to indicate that we're processing 6092 the input file named FILENAME. */ 6093 6094 void 6095 set_input (const char *filename) 6096 { 6097 const char *p; 6098 6099 gcc_input_filename = filename; 6100 input_filename_length = strlen (gcc_input_filename); 6101 input_basename = lbasename (gcc_input_filename); 6102 6103 /* Find a suffix starting with the last period, 6104 and set basename_length to exclude that suffix. */ 6105 basename_length = strlen (input_basename); 6106 suffixed_basename_length = basename_length; 6107 p = input_basename + basename_length; 6108 while (p != input_basename && *p != '.') 6109 --p; 6110 if (*p == '.' && p != input_basename) 6111 { 6112 basename_length = p - input_basename; 6113 input_suffix = p + 1; 6114 } 6115 else 6116 input_suffix = ""; 6117 6118 /* If a spec for 'g', 'u', or 'U' is seen with -save-temps then 6119 we will need to do a stat on the gcc_input_filename. The 6120 INPUT_STAT_SET signals that the stat is needed. */ 6121 input_stat_set = 0; 6122 } 6123 6124 /* On fatal signals, delete all the temporary files. */ 6125 6126 static void 6127 fatal_signal (int signum) 6128 { 6129 signal (signum, SIG_DFL); 6130 delete_failure_queue (); 6131 delete_temp_files (); 6132 /* Get the same signal again, this time not handled, 6133 so its normal effect occurs. */ 6134 kill (getpid (), signum); 6135 } 6136 6137 /* Compare the contents of the two files named CMPFILE[0] and 6138 CMPFILE[1]. Return zero if they're identical, nonzero 6139 otherwise. */ 6140 6141 static int 6142 compare_files (char *cmpfile[]) 6143 { 6144 int ret = 0; 6145 FILE *temp[2] = { NULL, NULL }; 6146 int i; 6147 6148 #if HAVE_MMAP_FILE 6149 { 6150 size_t length[2]; 6151 void *map[2] = { NULL, NULL }; 6152 6153 for (i = 0; i < 2; i++) 6154 { 6155 struct stat st; 6156 6157 if (stat (cmpfile[i], &st) < 0 || !S_ISREG (st.st_mode)) 6158 { 6159 error ("%s: could not determine length of compare-debug file %s", 6160 gcc_input_filename, cmpfile[i]); 6161 ret = 1; 6162 break; 6163 } 6164 6165 length[i] = st.st_size; 6166 } 6167 6168 if (!ret && length[0] != length[1]) 6169 { 6170 error ("%s: -fcompare-debug failure (length)", gcc_input_filename); 6171 ret = 1; 6172 } 6173 6174 if (!ret) 6175 for (i = 0; i < 2; i++) 6176 { 6177 int fd = open (cmpfile[i], O_RDONLY); 6178 if (fd < 0) 6179 { 6180 error ("%s: could not open compare-debug file %s", 6181 gcc_input_filename, cmpfile[i]); 6182 ret = 1; 6183 break; 6184 } 6185 6186 map[i] = mmap (NULL, length[i], PROT_READ, MAP_PRIVATE, fd, 0); 6187 close (fd); 6188 6189 if (map[i] == (void *) MAP_FAILED) 6190 { 6191 ret = -1; 6192 break; 6193 } 6194 } 6195 6196 if (!ret) 6197 { 6198 if (memcmp (map[0], map[1], length[0]) != 0) 6199 { 6200 error ("%s: -fcompare-debug failure", gcc_input_filename); 6201 ret = 1; 6202 } 6203 } 6204 6205 for (i = 0; i < 2; i++) 6206 if (map[i]) 6207 munmap ((caddr_t) map[i], length[i]); 6208 6209 if (ret >= 0) 6210 return ret; 6211 6212 ret = 0; 6213 } 6214 #endif 6215 6216 for (i = 0; i < 2; i++) 6217 { 6218 temp[i] = fopen (cmpfile[i], "r"); 6219 if (!temp[i]) 6220 { 6221 error ("%s: could not open compare-debug file %s", 6222 gcc_input_filename, cmpfile[i]); 6223 ret = 1; 6224 break; 6225 } 6226 } 6227 6228 if (!ret && temp[0] && temp[1]) 6229 for (;;) 6230 { 6231 int c0, c1; 6232 c0 = fgetc (temp[0]); 6233 c1 = fgetc (temp[1]); 6234 6235 if (c0 != c1) 6236 { 6237 error ("%s: -fcompare-debug failure", 6238 gcc_input_filename); 6239 ret = 1; 6240 break; 6241 } 6242 6243 if (c0 == EOF) 6244 break; 6245 } 6246 6247 for (i = 1; i >= 0; i--) 6248 { 6249 if (temp[i]) 6250 fclose (temp[i]); 6251 } 6252 6253 return ret; 6254 } 6255 6256 extern int main (int, char **); 6257 6258 int 6259 main (int argc, char **argv) 6260 { 6261 size_t i; 6262 int value; 6263 int linker_was_run = 0; 6264 int lang_n_infiles = 0; 6265 int num_linker_inputs = 0; 6266 char *explicit_link_files; 6267 char *specs_file; 6268 char *lto_wrapper_file; 6269 const char *p; 6270 struct user_specs *uptr; 6271 char **old_argv = argv; 6272 struct cl_decoded_option *decoded_options; 6273 unsigned int decoded_options_count; 6274 6275 p = argv[0] + strlen (argv[0]); 6276 while (p != argv[0] && !IS_DIR_SEPARATOR (p[-1])) 6277 --p; 6278 progname = p; 6279 6280 xmalloc_set_program_name (progname); 6281 6282 expandargv (&argc, &argv); 6283 6284 /* Determine if any expansions were made. */ 6285 if (argv != old_argv) 6286 at_file_supplied = true; 6287 6288 /* Register the language-independent parameters. */ 6289 global_init_params (); 6290 finish_params (); 6291 6292 init_options_struct (&global_options, &global_options_set); 6293 6294 decode_cmdline_options_to_array (argc, CONST_CAST2 (const char **, char **, 6295 argv), 6296 CL_DRIVER, 6297 &decoded_options, &decoded_options_count); 6298 6299 /* Unlock the stdio streams. */ 6300 unlock_std_streams (); 6301 6302 gcc_init_libintl (); 6303 6304 diagnostic_initialize (global_dc, 0); 6305 6306 #ifdef GCC_DRIVER_HOST_INITIALIZATION 6307 /* Perform host dependent initialization when needed. */ 6308 GCC_DRIVER_HOST_INITIALIZATION; 6309 #endif 6310 6311 if (atexit (delete_temp_files) != 0) 6312 fatal_error ("atexit failed"); 6313 6314 if (signal (SIGINT, SIG_IGN) != SIG_IGN) 6315 signal (SIGINT, fatal_signal); 6316 #ifdef SIGHUP 6317 if (signal (SIGHUP, SIG_IGN) != SIG_IGN) 6318 signal (SIGHUP, fatal_signal); 6319 #endif 6320 if (signal (SIGTERM, SIG_IGN) != SIG_IGN) 6321 signal (SIGTERM, fatal_signal); 6322 #ifdef SIGPIPE 6323 if (signal (SIGPIPE, SIG_IGN) != SIG_IGN) 6324 signal (SIGPIPE, fatal_signal); 6325 #endif 6326 #ifdef SIGCHLD 6327 /* We *MUST* set SIGCHLD to SIG_DFL so that the wait4() call will 6328 receive the signal. A different setting is inheritable */ 6329 signal (SIGCHLD, SIG_DFL); 6330 #endif 6331 6332 /* Parsing and gimplification sometimes need quite large stack. 6333 Increase stack size limits if possible. */ 6334 stack_limit_increase (64 * 1024 * 1024); 6335 6336 /* Allocate the argument vector. */ 6337 alloc_args (); 6338 6339 obstack_init (&obstack); 6340 6341 /* Build multilib_select, et. al from the separate lines that make up each 6342 multilib selection. */ 6343 { 6344 const char *const *q = multilib_raw; 6345 int need_space; 6346 6347 obstack_init (&multilib_obstack); 6348 while ((p = *q++) != (char *) 0) 6349 obstack_grow (&multilib_obstack, p, strlen (p)); 6350 6351 obstack_1grow (&multilib_obstack, 0); 6352 multilib_select = XOBFINISH (&multilib_obstack, const char *); 6353 6354 q = multilib_matches_raw; 6355 while ((p = *q++) != (char *) 0) 6356 obstack_grow (&multilib_obstack, p, strlen (p)); 6357 6358 obstack_1grow (&multilib_obstack, 0); 6359 multilib_matches = XOBFINISH (&multilib_obstack, const char *); 6360 6361 q = multilib_exclusions_raw; 6362 while ((p = *q++) != (char *) 0) 6363 obstack_grow (&multilib_obstack, p, strlen (p)); 6364 6365 obstack_1grow (&multilib_obstack, 0); 6366 multilib_exclusions = XOBFINISH (&multilib_obstack, const char *); 6367 6368 q = multilib_reuse_raw; 6369 while ((p = *q++) != (char *) 0) 6370 obstack_grow (&multilib_obstack, p, strlen (p)); 6371 6372 obstack_1grow (&multilib_obstack, 0); 6373 multilib_reuse = XOBFINISH (&multilib_obstack, const char *); 6374 6375 need_space = FALSE; 6376 for (i = 0; i < ARRAY_SIZE (multilib_defaults_raw); i++) 6377 { 6378 if (need_space) 6379 obstack_1grow (&multilib_obstack, ' '); 6380 obstack_grow (&multilib_obstack, 6381 multilib_defaults_raw[i], 6382 strlen (multilib_defaults_raw[i])); 6383 need_space = TRUE; 6384 } 6385 6386 obstack_1grow (&multilib_obstack, 0); 6387 multilib_defaults = XOBFINISH (&multilib_obstack, const char *); 6388 } 6389 6390 #ifdef INIT_ENVIRONMENT 6391 /* Set up any other necessary machine specific environment variables. */ 6392 xputenv (INIT_ENVIRONMENT); 6393 #endif 6394 6395 /* Make a table of what switches there are (switches, n_switches). 6396 Make a table of specified input files (infiles, n_infiles). 6397 Decode switches that are handled locally. */ 6398 6399 process_command (decoded_options_count, decoded_options); 6400 6401 /* Initialize the vector of specs to just the default. 6402 This means one element containing 0s, as a terminator. */ 6403 6404 compilers = XNEWVAR (struct compiler, sizeof default_compilers); 6405 memcpy (compilers, default_compilers, sizeof default_compilers); 6406 n_compilers = n_default_compilers; 6407 6408 /* Read specs from a file if there is one. */ 6409 6410 machine_suffix = concat (spec_machine, dir_separator_str, 6411 spec_version, dir_separator_str, NULL); 6412 just_machine_suffix = concat (spec_machine, dir_separator_str, NULL); 6413 6414 specs_file = find_a_file (&startfile_prefixes, "specs", R_OK, true); 6415 /* Read the specs file unless it is a default one. */ 6416 if (specs_file != 0 && strcmp (specs_file, "specs")) 6417 read_specs (specs_file, true, false); 6418 else 6419 init_spec (); 6420 6421 #ifndef NETBSD_NATIVE 6422 /* We need to check standard_exec_prefix/just_machine_suffix/specs 6423 for any override of as, ld and libraries. */ 6424 specs_file = (char *) alloca (strlen (standard_exec_prefix) 6425 + strlen (just_machine_suffix) + sizeof ("specs")); 6426 6427 strcpy (specs_file, standard_exec_prefix); 6428 strcat (specs_file, just_machine_suffix); 6429 strcat (specs_file, "specs"); 6430 if (access (specs_file, R_OK) == 0) 6431 read_specs (specs_file, true, false); 6432 #endif 6433 6434 /* Process any configure-time defaults specified for the command line 6435 options, via OPTION_DEFAULT_SPECS. */ 6436 for (i = 0; i < ARRAY_SIZE (option_default_specs); i++) 6437 do_option_spec (option_default_specs[i].name, 6438 option_default_specs[i].spec); 6439 6440 /* Process DRIVER_SELF_SPECS, adding any new options to the end 6441 of the command line. */ 6442 6443 for (i = 0; i < ARRAY_SIZE (driver_self_specs); i++) 6444 do_self_spec (driver_self_specs[i]); 6445 6446 /* If not cross-compiling, look for executables in the standard 6447 places. */ 6448 if (*cross_compile == '0') 6449 { 6450 if (*md_exec_prefix) 6451 { 6452 add_prefix (&exec_prefixes, md_exec_prefix, "GCC", 6453 PREFIX_PRIORITY_LAST, 0, 0); 6454 } 6455 } 6456 6457 /* Process sysroot_suffix_spec. */ 6458 if (*sysroot_suffix_spec != 0 6459 && !no_sysroot_suffix 6460 && do_spec_2 (sysroot_suffix_spec) == 0) 6461 { 6462 if (argbuf.length () > 1) 6463 error ("spec failure: more than one arg to SYSROOT_SUFFIX_SPEC"); 6464 else if (argbuf.length () == 1) 6465 target_sysroot_suffix = xstrdup (argbuf.last ()); 6466 } 6467 6468 #ifdef HAVE_LD_SYSROOT 6469 /* Pass the --sysroot option to the linker, if it supports that. If 6470 there is a sysroot_suffix_spec, it has already been processed by 6471 this point, so target_system_root really is the system root we 6472 should be using. */ 6473 if (target_system_root) 6474 { 6475 obstack_grow (&obstack, "%(sysroot_spec) ", strlen ("%(sysroot_spec) ")); 6476 obstack_grow0 (&obstack, link_spec, strlen (link_spec)); 6477 set_spec ("link", XOBFINISH (&obstack, const char *), false); 6478 } 6479 #endif 6480 6481 /* Process sysroot_hdrs_suffix_spec. */ 6482 if (*sysroot_hdrs_suffix_spec != 0 6483 && !no_sysroot_suffix 6484 && do_spec_2 (sysroot_hdrs_suffix_spec) == 0) 6485 { 6486 if (argbuf.length () > 1) 6487 error ("spec failure: more than one arg to SYSROOT_HEADERS_SUFFIX_SPEC"); 6488 else if (argbuf.length () == 1) 6489 target_sysroot_hdrs_suffix = xstrdup (argbuf.last ()); 6490 } 6491 6492 /* Look for startfiles in the standard places. */ 6493 if (*startfile_prefix_spec != 0 6494 && do_spec_2 (startfile_prefix_spec) == 0 6495 && do_spec_1 (" ", 0, NULL) == 0) 6496 { 6497 const char *arg; 6498 int ndx; 6499 FOR_EACH_VEC_ELT (argbuf, ndx, arg) 6500 add_sysrooted_prefix (&startfile_prefixes, arg, "BINUTILS", 6501 PREFIX_PRIORITY_LAST, 0, 1); 6502 } 6503 /* We should eventually get rid of all these and stick to 6504 startfile_prefix_spec exclusively. */ 6505 else if (*cross_compile == '0' || target_system_root) 6506 { 6507 if (*md_startfile_prefix) 6508 add_sysrooted_prefix (&startfile_prefixes, md_startfile_prefix, 6509 "GCC", PREFIX_PRIORITY_LAST, 0, 1); 6510 6511 if (*md_startfile_prefix_1) 6512 add_sysrooted_prefix (&startfile_prefixes, md_startfile_prefix_1, 6513 "GCC", PREFIX_PRIORITY_LAST, 0, 1); 6514 6515 /* If standard_startfile_prefix is relative, base it on 6516 standard_exec_prefix. This lets us move the installed tree 6517 as a unit. If GCC_EXEC_PREFIX is defined, base 6518 standard_startfile_prefix on that as well. 6519 6520 If the prefix is relative, only search it for native compilers; 6521 otherwise we will search a directory containing host libraries. */ 6522 if (IS_ABSOLUTE_PATH (standard_startfile_prefix)) 6523 add_sysrooted_prefix (&startfile_prefixes, 6524 standard_startfile_prefix, "BINUTILS", 6525 PREFIX_PRIORITY_LAST, 0, 1); 6526 else if (*cross_compile == '0') 6527 { 6528 /* XXXMRG not sure this one is right? */ 6529 #if !defined(NETBSD_NATIVE) && !defined(NETBSD_TOOLS) 6530 add_prefix (&startfile_prefixes, 6531 concat (gcc_exec_prefix 6532 ? gcc_exec_prefix : standard_exec_prefix, 6533 machine_suffix, 6534 standard_startfile_prefix, NULL), 6535 NULL, PREFIX_PRIORITY_LAST, 0, 1); 6536 #endif /* NETBSD_NATIVE */ 6537 } 6538 6539 #if !defined(NETBSD_NATIVE) && !defined(NETBSD_TOOLS) 6540 /* Sysrooted prefixes are relocated because target_system_root is 6541 also relocated by gcc_exec_prefix. */ 6542 if (*standard_startfile_prefix_1) 6543 add_sysrooted_prefix (&startfile_prefixes, 6544 standard_startfile_prefix_1, "BINUTILS", 6545 PREFIX_PRIORITY_LAST, 0, 1); 6546 if (*standard_startfile_prefix_2) 6547 add_sysrooted_prefix (&startfile_prefixes, 6548 standard_startfile_prefix_2, "BINUTILS", 6549 PREFIX_PRIORITY_LAST, 0, 1); 6550 #endif /* NETBSD_NATIVE */ 6551 } 6552 6553 /* Process any user specified specs in the order given on the command 6554 line. */ 6555 for (uptr = user_specs_head; uptr; uptr = uptr->next) 6556 { 6557 char *filename = find_a_file (&startfile_prefixes, uptr->filename, 6558 R_OK, true); 6559 read_specs (filename ? filename : uptr->filename, false, true); 6560 } 6561 6562 /* Process any user self specs. */ 6563 { 6564 struct spec_list *sl; 6565 for (sl = specs; sl; sl = sl->next) 6566 if (sl->name_len == sizeof "self_spec" - 1 6567 && !strcmp (sl->name, "self_spec")) 6568 do_self_spec (*sl->ptr_spec); 6569 } 6570 6571 if (compare_debug) 6572 { 6573 enum save_temps save; 6574 6575 if (!compare_debug_second) 6576 { 6577 n_switches_debug_check[1] = n_switches; 6578 n_switches_alloc_debug_check[1] = n_switches_alloc; 6579 switches_debug_check[1] = XDUPVEC (struct switchstr, switches, 6580 n_switches_alloc); 6581 6582 do_self_spec ("%:compare-debug-self-opt()"); 6583 n_switches_debug_check[0] = n_switches; 6584 n_switches_alloc_debug_check[0] = n_switches_alloc; 6585 switches_debug_check[0] = switches; 6586 6587 n_switches = n_switches_debug_check[1]; 6588 n_switches_alloc = n_switches_alloc_debug_check[1]; 6589 switches = switches_debug_check[1]; 6590 } 6591 6592 /* Avoid crash when computing %j in this early. */ 6593 save = save_temps_flag; 6594 save_temps_flag = SAVE_TEMPS_NONE; 6595 6596 compare_debug = -compare_debug; 6597 do_self_spec ("%:compare-debug-self-opt()"); 6598 6599 save_temps_flag = save; 6600 6601 if (!compare_debug_second) 6602 { 6603 n_switches_debug_check[1] = n_switches; 6604 n_switches_alloc_debug_check[1] = n_switches_alloc; 6605 switches_debug_check[1] = switches; 6606 compare_debug = -compare_debug; 6607 n_switches = n_switches_debug_check[0]; 6608 n_switches_alloc = n_switches_debug_check[0]; 6609 switches = switches_debug_check[0]; 6610 } 6611 } 6612 6613 6614 /* If we have a GCC_EXEC_PREFIX envvar, modify it for cpp's sake. */ 6615 if (gcc_exec_prefix) 6616 gcc_exec_prefix = concat (gcc_exec_prefix, spec_machine, dir_separator_str, 6617 spec_version, dir_separator_str, NULL); 6618 6619 /* Now we have the specs. 6620 Set the `valid' bits for switches that match anything in any spec. */ 6621 6622 validate_all_switches (); 6623 6624 /* Now that we have the switches and the specs, set 6625 the subdirectory based on the options. */ 6626 set_multilib_dir (); 6627 6628 /* Set up to remember the pathname of gcc and any options 6629 needed for collect. We use argv[0] instead of progname because 6630 we need the complete pathname. */ 6631 obstack_init (&collect_obstack); 6632 obstack_grow (&collect_obstack, "COLLECT_GCC=", sizeof ("COLLECT_GCC=") - 1); 6633 obstack_grow (&collect_obstack, argv[0], strlen (argv[0]) + 1); 6634 xputenv (XOBFINISH (&collect_obstack, char *)); 6635 6636 /* Set up to remember the pathname of the lto wrapper. */ 6637 6638 if (have_c) 6639 lto_wrapper_file = NULL; 6640 else 6641 lto_wrapper_file = find_a_file (&exec_prefixes, "lto-wrapper", 6642 X_OK, false); 6643 if (lto_wrapper_file) 6644 { 6645 lto_wrapper_file = convert_white_space (lto_wrapper_file); 6646 lto_wrapper_spec = lto_wrapper_file; 6647 obstack_init (&collect_obstack); 6648 obstack_grow (&collect_obstack, "COLLECT_LTO_WRAPPER=", 6649 sizeof ("COLLECT_LTO_WRAPPER=") - 1); 6650 obstack_grow (&collect_obstack, lto_wrapper_spec, 6651 strlen (lto_wrapper_spec) + 1); 6652 xputenv (XOBFINISH (&collect_obstack, char *)); 6653 } 6654 6655 /* Reject switches that no pass was interested in. */ 6656 6657 for (i = 0; (int) i < n_switches; i++) 6658 if (! switches[i].validated) 6659 error ("unrecognized command line option %<-%s%>", switches[i].part1); 6660 6661 /* Obey some of the options. */ 6662 6663 if (print_search_dirs) 6664 { 6665 printf (_("install: %s%s\n"), 6666 gcc_exec_prefix ? gcc_exec_prefix : standard_exec_prefix, 6667 gcc_exec_prefix ? "" : machine_suffix); 6668 printf (_("programs: %s\n"), 6669 build_search_list (&exec_prefixes, "", false, false)); 6670 printf (_("libraries: %s\n"), 6671 build_search_list (&startfile_prefixes, "", false, true)); 6672 return (0); 6673 } 6674 6675 if (print_file_name) 6676 { 6677 printf ("%s\n", find_file (print_file_name)); 6678 return (0); 6679 } 6680 6681 if (print_prog_name) 6682 { 6683 char *newname = find_a_file (&exec_prefixes, print_prog_name, X_OK, 0); 6684 printf ("%s\n", (newname ? newname : print_prog_name)); 6685 return (0); 6686 } 6687 6688 if (print_multi_lib) 6689 { 6690 print_multilib_info (); 6691 return (0); 6692 } 6693 6694 if (print_multi_directory) 6695 { 6696 if (multilib_dir == NULL) 6697 printf (".\n"); 6698 else 6699 printf ("%s\n", multilib_dir); 6700 return (0); 6701 } 6702 6703 if (print_multiarch) 6704 { 6705 if (multiarch_dir == NULL) 6706 printf ("\n"); 6707 else 6708 printf ("%s\n", multiarch_dir); 6709 return (0); 6710 } 6711 6712 if (print_sysroot) 6713 { 6714 if (target_system_root) 6715 { 6716 if (target_sysroot_suffix) 6717 printf ("%s%s\n", target_system_root, target_sysroot_suffix); 6718 else 6719 printf ("%s\n", target_system_root); 6720 } 6721 return (0); 6722 } 6723 6724 if (print_multi_os_directory) 6725 { 6726 if (multilib_os_dir == NULL) 6727 printf (".\n"); 6728 else 6729 printf ("%s\n", multilib_os_dir); 6730 return (0); 6731 } 6732 6733 if (print_sysroot_headers_suffix) 6734 { 6735 if (*sysroot_hdrs_suffix_spec) 6736 { 6737 printf("%s\n", (target_sysroot_hdrs_suffix 6738 ? target_sysroot_hdrs_suffix 6739 : "")); 6740 return (0); 6741 } 6742 else 6743 /* The error status indicates that only one set of fixed 6744 headers should be built. */ 6745 fatal_error ("not configured with sysroot headers suffix"); 6746 } 6747 6748 if (print_help_list) 6749 { 6750 display_help (); 6751 6752 if (! verbose_flag) 6753 { 6754 printf (_("\nFor bug reporting instructions, please see:\n")); 6755 printf ("%s.\n", bug_report_url); 6756 6757 return (0); 6758 } 6759 6760 /* We do not exit here. Instead we have created a fake input file 6761 called 'help-dummy' which needs to be compiled, and we pass this 6762 on the various sub-processes, along with the --help switch. 6763 Ensure their output appears after ours. */ 6764 fputc ('\n', stdout); 6765 fflush (stdout); 6766 } 6767 6768 if (print_version) 6769 { 6770 printf (_("%s %s%s\n"), progname, pkgversion_string, 6771 version_string); 6772 printf ("Copyright %s 2015 Free Software Foundation, Inc.\n", 6773 _("(C)")); 6774 fputs (_("This is free software; see the source for copying conditions. There is NO\n\ 6775 warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n\n"), 6776 stdout); 6777 if (! verbose_flag) 6778 return 0; 6779 6780 /* We do not exit here. We use the same mechanism of --help to print 6781 the version of the sub-processes. */ 6782 fputc ('\n', stdout); 6783 fflush (stdout); 6784 } 6785 6786 if (verbose_flag) 6787 { 6788 int n; 6789 const char *thrmod; 6790 6791 fnotice (stderr, "Target: %s\n", spec_machine); 6792 fnotice (stderr, "Configured with: %s\n", configuration_arguments); 6793 6794 #ifdef THREAD_MODEL_SPEC 6795 /* We could have defined THREAD_MODEL_SPEC to "%*" by default, 6796 but there's no point in doing all this processing just to get 6797 thread_model back. */ 6798 obstack_init (&obstack); 6799 do_spec_1 (THREAD_MODEL_SPEC, 0, thread_model); 6800 obstack_1grow (&obstack, '\0'); 6801 thrmod = XOBFINISH (&obstack, const char *); 6802 #else 6803 thrmod = thread_model; 6804 #endif 6805 6806 fnotice (stderr, "Thread model: %s\n", thrmod); 6807 6808 /* compiler_version is truncated at the first space when initialized 6809 from version string, so truncate version_string at the first space 6810 before comparing. */ 6811 for (n = 0; version_string[n]; n++) 6812 if (version_string[n] == ' ') 6813 break; 6814 6815 if (! strncmp (version_string, compiler_version, n) 6816 && compiler_version[n] == 0) 6817 fnotice (stderr, "gcc version %s %s\n", version_string, 6818 pkgversion_string); 6819 else 6820 fnotice (stderr, "gcc driver version %s %sexecuting gcc version %s\n", 6821 version_string, pkgversion_string, compiler_version); 6822 6823 if (n_infiles == 0) 6824 return (0); 6825 } 6826 6827 if (n_infiles == added_libraries) 6828 fatal_error ("no input files"); 6829 6830 if (seen_error ()) 6831 goto out; 6832 6833 /* Make a place to record the compiler output file names 6834 that correspond to the input files. */ 6835 6836 i = n_infiles; 6837 i += lang_specific_extra_outfiles; 6838 outfiles = XCNEWVEC (const char *, i); 6839 6840 /* Record which files were specified explicitly as link input. */ 6841 6842 explicit_link_files = XCNEWVEC (char, n_infiles); 6843 6844 combine_inputs = have_o || flag_wpa; 6845 6846 for (i = 0; (int) i < n_infiles; i++) 6847 { 6848 const char *name = infiles[i].name; 6849 struct compiler *compiler = lookup_compiler (name, 6850 strlen (name), 6851 infiles[i].language); 6852 6853 if (compiler && !(compiler->combinable)) 6854 combine_inputs = false; 6855 6856 if (lang_n_infiles > 0 && compiler != input_file_compiler 6857 && infiles[i].language && infiles[i].language[0] != '*') 6858 infiles[i].incompiler = compiler; 6859 else if (compiler) 6860 { 6861 lang_n_infiles++; 6862 input_file_compiler = compiler; 6863 infiles[i].incompiler = compiler; 6864 } 6865 else 6866 { 6867 /* Since there is no compiler for this input file, assume it is a 6868 linker file. */ 6869 explicit_link_files[i] = 1; 6870 infiles[i].incompiler = NULL; 6871 } 6872 infiles[i].compiled = false; 6873 infiles[i].preprocessed = false; 6874 } 6875 6876 if (!combine_inputs && have_c && have_o && lang_n_infiles > 1) 6877 fatal_error ("cannot specify -o with -c, -S or -E with multiple files"); 6878 6879 for (i = 0; (int) i < n_infiles; i++) 6880 { 6881 int this_file_error = 0; 6882 6883 /* Tell do_spec what to substitute for %i. */ 6884 6885 input_file_number = i; 6886 set_input (infiles[i].name); 6887 6888 if (infiles[i].compiled) 6889 continue; 6890 6891 /* Use the same thing in %o, unless cp->spec says otherwise. */ 6892 6893 outfiles[i] = gcc_input_filename; 6894 6895 /* Figure out which compiler from the file's suffix. */ 6896 6897 input_file_compiler 6898 = lookup_compiler (infiles[i].name, input_filename_length, 6899 infiles[i].language); 6900 6901 if (input_file_compiler) 6902 { 6903 /* Ok, we found an applicable compiler. Run its spec. */ 6904 6905 if (input_file_compiler->spec[0] == '#') 6906 { 6907 error ("%s: %s compiler not installed on this system", 6908 gcc_input_filename, &input_file_compiler->spec[1]); 6909 this_file_error = 1; 6910 } 6911 else 6912 { 6913 if (compare_debug) 6914 { 6915 free (debug_check_temp_file[0]); 6916 debug_check_temp_file[0] = NULL; 6917 6918 free (debug_check_temp_file[1]); 6919 debug_check_temp_file[1] = NULL; 6920 } 6921 6922 value = do_spec (input_file_compiler->spec); 6923 infiles[i].compiled = true; 6924 if (value < 0) 6925 this_file_error = 1; 6926 else if (compare_debug && debug_check_temp_file[0]) 6927 { 6928 if (verbose_flag) 6929 inform (0, "recompiling with -fcompare-debug"); 6930 6931 compare_debug = -compare_debug; 6932 n_switches = n_switches_debug_check[1]; 6933 n_switches_alloc = n_switches_alloc_debug_check[1]; 6934 switches = switches_debug_check[1]; 6935 6936 value = do_spec (input_file_compiler->spec); 6937 6938 compare_debug = -compare_debug; 6939 n_switches = n_switches_debug_check[0]; 6940 n_switches_alloc = n_switches_alloc_debug_check[0]; 6941 switches = switches_debug_check[0]; 6942 6943 if (value < 0) 6944 { 6945 error ("during -fcompare-debug recompilation"); 6946 this_file_error = 1; 6947 } 6948 6949 gcc_assert (debug_check_temp_file[1] 6950 && filename_cmp (debug_check_temp_file[0], 6951 debug_check_temp_file[1])); 6952 6953 if (verbose_flag) 6954 inform (0, "comparing final insns dumps"); 6955 6956 if (compare_files (debug_check_temp_file)) 6957 this_file_error = 1; 6958 } 6959 6960 if (compare_debug) 6961 { 6962 free (debug_check_temp_file[0]); 6963 debug_check_temp_file[0] = NULL; 6964 6965 free (debug_check_temp_file[1]); 6966 debug_check_temp_file[1] = NULL; 6967 } 6968 } 6969 } 6970 6971 /* If this file's name does not contain a recognized suffix, 6972 record it as explicit linker input. */ 6973 6974 else 6975 explicit_link_files[i] = 1; 6976 6977 /* Clear the delete-on-failure queue, deleting the files in it 6978 if this compilation failed. */ 6979 6980 if (this_file_error) 6981 { 6982 delete_failure_queue (); 6983 errorcount++; 6984 } 6985 /* If this compilation succeeded, don't delete those files later. */ 6986 clear_failure_queue (); 6987 } 6988 6989 /* Reset the input file name to the first compile/object file name, for use 6990 with %b in LINK_SPEC. We use the first input file that we can find 6991 a compiler to compile it instead of using infiles.language since for 6992 languages other than C we use aliases that we then lookup later. */ 6993 if (n_infiles > 0) 6994 { 6995 int i; 6996 6997 for (i = 0; i < n_infiles ; i++) 6998 if (infiles[i].incompiler 6999 || (infiles[i].language && infiles[i].language[0] != '*')) 7000 { 7001 set_input (infiles[i].name); 7002 break; 7003 } 7004 } 7005 7006 if (!seen_error ()) 7007 { 7008 /* Make sure INPUT_FILE_NUMBER points to first available open 7009 slot. */ 7010 input_file_number = n_infiles; 7011 if (lang_specific_pre_link ()) 7012 errorcount++; 7013 } 7014 7015 /* Determine if there are any linker input files. */ 7016 num_linker_inputs = 0; 7017 for (i = 0; (int) i < n_infiles; i++) 7018 if (explicit_link_files[i] || outfiles[i] != NULL) 7019 num_linker_inputs++; 7020 7021 /* Run ld to link all the compiler output files. */ 7022 7023 if (num_linker_inputs > 0 && !seen_error () && print_subprocess_help < 2) 7024 { 7025 int tmp = execution_count; 7026 7027 if (! have_c) 7028 { 7029 #if HAVE_LTO_PLUGIN > 0 7030 #if HAVE_LTO_PLUGIN == 2 7031 const char *fno_use_linker_plugin = "fno-use-linker-plugin"; 7032 #else 7033 const char *fuse_linker_plugin = "fuse-linker-plugin"; 7034 #endif 7035 #endif 7036 7037 /* We'll use ld if we can't find collect2. */ 7038 if (! strcmp (linker_name_spec, "collect2")) 7039 { 7040 char *s = find_a_file (&exec_prefixes, "collect2", X_OK, false); 7041 if (s == NULL) 7042 linker_name_spec = "ld"; 7043 } 7044 7045 #if HAVE_LTO_PLUGIN > 0 7046 #if HAVE_LTO_PLUGIN == 2 7047 if (!switch_matches (fno_use_linker_plugin, 7048 fno_use_linker_plugin 7049 + strlen (fno_use_linker_plugin), 0)) 7050 #else 7051 if (switch_matches (fuse_linker_plugin, 7052 fuse_linker_plugin 7053 + strlen (fuse_linker_plugin), 0)) 7054 #endif 7055 { 7056 char *temp_spec = find_a_file (&exec_prefixes, 7057 LTOPLUGINSONAME, R_OK, 7058 false); 7059 if (!temp_spec) 7060 fatal_error ("-fuse-linker-plugin, but %s not found", 7061 LTOPLUGINSONAME); 7062 linker_plugin_file_spec = convert_white_space (temp_spec); 7063 } 7064 #endif 7065 lto_gcc_spec = argv[0]; 7066 } 7067 7068 /* Rebuild the COMPILER_PATH and LIBRARY_PATH environment variables 7069 for collect. */ 7070 putenv_from_prefixes (&exec_prefixes, "COMPILER_PATH", false); 7071 putenv_from_prefixes (&startfile_prefixes, LIBRARY_PATH_ENV, true); 7072 7073 if (print_subprocess_help == 1) 7074 { 7075 printf (_("\nLinker options\n==============\n\n")); 7076 printf (_("Use \"-Wl,OPTION\" to pass \"OPTION\"" 7077 " to the linker.\n\n")); 7078 fflush (stdout); 7079 } 7080 value = do_spec (link_command_spec); 7081 if (value < 0) 7082 errorcount = 1; 7083 linker_was_run = (tmp != execution_count); 7084 } 7085 7086 /* If options said don't run linker, 7087 complain about input files to be given to the linker. */ 7088 7089 if (! linker_was_run && !seen_error ()) 7090 for (i = 0; (int) i < n_infiles; i++) 7091 if (explicit_link_files[i] 7092 && !(infiles[i].language && infiles[i].language[0] == '*')) 7093 warning (0, "%s: linker input file unused because linking not done", 7094 outfiles[i]); 7095 7096 /* Delete some or all of the temporary files we made. */ 7097 7098 if (seen_error ()) 7099 delete_failure_queue (); 7100 delete_temp_files (); 7101 7102 if (print_help_list) 7103 { 7104 printf (("\nFor bug reporting instructions, please see:\n")); 7105 printf ("%s\n", bug_report_url); 7106 } 7107 7108 out: 7109 return (signal_count != 0 ? 2 7110 : seen_error () ? (pass_exit_codes ? greatest_status : 1) 7111 : 0); 7112 } 7113 7114 /* Find the proper compilation spec for the file name NAME, 7115 whose length is LENGTH. LANGUAGE is the specified language, 7116 or 0 if this file is to be passed to the linker. */ 7117 7118 static struct compiler * 7119 lookup_compiler (const char *name, size_t length, const char *language) 7120 { 7121 struct compiler *cp; 7122 7123 /* If this was specified by the user to be a linker input, indicate that. */ 7124 if (language != 0 && language[0] == '*') 7125 return 0; 7126 7127 /* Otherwise, look for the language, if one is spec'd. */ 7128 if (language != 0) 7129 { 7130 for (cp = compilers + n_compilers - 1; cp >= compilers; cp--) 7131 if (cp->suffix[0] == '@' && !strcmp (cp->suffix + 1, language)) 7132 return cp; 7133 7134 error ("language %s not recognized", language); 7135 return 0; 7136 } 7137 7138 /* Look for a suffix. */ 7139 for (cp = compilers + n_compilers - 1; cp >= compilers; cp--) 7140 { 7141 if (/* The suffix `-' matches only the file name `-'. */ 7142 (!strcmp (cp->suffix, "-") && !strcmp (name, "-")) 7143 || (strlen (cp->suffix) < length 7144 /* See if the suffix matches the end of NAME. */ 7145 && !strcmp (cp->suffix, 7146 name + length - strlen (cp->suffix)) 7147 )) 7148 break; 7149 } 7150 7151 #if defined (OS2) ||defined (HAVE_DOS_BASED_FILE_SYSTEM) 7152 /* Look again, but case-insensitively this time. */ 7153 if (cp < compilers) 7154 for (cp = compilers + n_compilers - 1; cp >= compilers; cp--) 7155 { 7156 if (/* The suffix `-' matches only the file name `-'. */ 7157 (!strcmp (cp->suffix, "-") && !strcmp (name, "-")) 7158 || (strlen (cp->suffix) < length 7159 /* See if the suffix matches the end of NAME. */ 7160 && ((!strcmp (cp->suffix, 7161 name + length - strlen (cp->suffix)) 7162 || !strpbrk (cp->suffix, "ABCDEFGHIJKLMNOPQRSTUVWXYZ")) 7163 && !strcasecmp (cp->suffix, 7164 name + length - strlen (cp->suffix))) 7165 )) 7166 break; 7167 } 7168 #endif 7169 7170 if (cp >= compilers) 7171 { 7172 if (cp->spec[0] != '@') 7173 /* A non-alias entry: return it. */ 7174 return cp; 7175 7176 /* An alias entry maps a suffix to a language. 7177 Search for the language; pass 0 for NAME and LENGTH 7178 to avoid infinite recursion if language not found. */ 7179 return lookup_compiler (NULL, 0, cp->spec + 1); 7180 } 7181 return 0; 7182 } 7183 7184 static char * 7185 save_string (const char *s, int len) 7186 { 7187 char *result = XNEWVEC (char, len + 1); 7188 7189 memcpy (result, s, len); 7190 result[len] = 0; 7191 return result; 7192 } 7193 7194 void 7195 pfatal_with_name (const char *name) 7196 { 7197 perror_with_name (name); 7198 delete_temp_files (); 7199 exit (1); 7200 } 7201 7202 static void 7203 perror_with_name (const char *name) 7204 { 7205 error ("%s: %m", name); 7206 } 7207 7208 static inline void 7209 validate_switches_from_spec (const char *spec, bool user) 7210 { 7211 const char *p = spec; 7212 char c; 7213 while ((c = *p++)) 7214 if (c == '%' && (*p == '{' || *p == '<' || (*p == 'W' && *++p == '{'))) 7215 /* We have a switch spec. */ 7216 p = validate_switches (p + 1, user); 7217 } 7218 7219 static void 7220 validate_all_switches (void) 7221 { 7222 struct compiler *comp; 7223 struct spec_list *spec; 7224 7225 for (comp = compilers; comp->spec; comp++) 7226 validate_switches_from_spec (comp->spec, false); 7227 7228 /* Look through the linked list of specs read from the specs file. */ 7229 for (spec = specs; spec; spec = spec->next) 7230 validate_switches_from_spec (*spec->ptr_spec, spec->user_p); 7231 7232 validate_switches_from_spec (link_command_spec, false); 7233 } 7234 7235 /* Look at the switch-name that comes after START 7236 and mark as valid all supplied switches that match it. */ 7237 7238 static const char * 7239 validate_switches (const char *start, bool user_spec) 7240 { 7241 const char *p = start; 7242 const char *atom; 7243 size_t len; 7244 int i; 7245 bool suffix = false; 7246 bool starred = false; 7247 7248 #define SKIP_WHITE() do { while (*p == ' ' || *p == '\t') p++; } while (0) 7249 7250 next_member: 7251 SKIP_WHITE (); 7252 7253 if (*p == '!') 7254 p++; 7255 7256 SKIP_WHITE (); 7257 if (*p == '.' || *p == ',') 7258 suffix = true, p++; 7259 7260 atom = p; 7261 while (ISIDNUM (*p) || *p == '-' || *p == '+' || *p == '=' 7262 || *p == ',' || *p == '.' || *p == '@') 7263 p++; 7264 len = p - atom; 7265 7266 if (*p == '*') 7267 starred = true, p++; 7268 7269 SKIP_WHITE (); 7270 7271 if (!suffix) 7272 { 7273 /* Mark all matching switches as valid. */ 7274 for (i = 0; i < n_switches; i++) 7275 if (!strncmp (switches[i].part1, atom, len) 7276 && (starred || switches[i].part1[len] == '\0') 7277 && (switches[i].known || user_spec)) 7278 switches[i].validated = true; 7279 } 7280 7281 if (*p) p++; 7282 if (*p && (p[-1] == '|' || p[-1] == '&')) 7283 goto next_member; 7284 7285 if (*p && p[-1] == ':') 7286 { 7287 while (*p && *p != ';' && *p != '}') 7288 { 7289 if (*p == '%') 7290 { 7291 p++; 7292 if (*p == '{' || *p == '<') 7293 p = validate_switches (p+1, user_spec); 7294 else if (p[0] == 'W' && p[1] == '{') 7295 p = validate_switches (p+2, user_spec); 7296 } 7297 else 7298 p++; 7299 } 7300 7301 if (*p) p++; 7302 if (*p && p[-1] == ';') 7303 goto next_member; 7304 } 7305 7306 return p; 7307 #undef SKIP_WHITE 7308 } 7309 7310 struct mdswitchstr 7311 { 7312 const char *str; 7313 int len; 7314 }; 7315 7316 static struct mdswitchstr *mdswitches; 7317 static int n_mdswitches; 7318 7319 /* Check whether a particular argument was used. The first time we 7320 canonicalize the switches to keep only the ones we care about. */ 7321 7322 static int 7323 used_arg (const char *p, int len) 7324 { 7325 struct mswitchstr 7326 { 7327 const char *str; 7328 const char *replace; 7329 int len; 7330 int rep_len; 7331 }; 7332 7333 static struct mswitchstr *mswitches; 7334 static int n_mswitches; 7335 int i, j; 7336 7337 if (!mswitches) 7338 { 7339 struct mswitchstr *matches; 7340 const char *q; 7341 int cnt = 0; 7342 7343 /* Break multilib_matches into the component strings of string 7344 and replacement string. */ 7345 for (q = multilib_matches; *q != '\0'; q++) 7346 if (*q == ';') 7347 cnt++; 7348 7349 matches 7350 = (struct mswitchstr *) alloca ((sizeof (struct mswitchstr)) * cnt); 7351 i = 0; 7352 q = multilib_matches; 7353 while (*q != '\0') 7354 { 7355 matches[i].str = q; 7356 while (*q != ' ') 7357 { 7358 if (*q == '\0') 7359 { 7360 invalid_matches: 7361 fatal_error ("multilib spec %qs is invalid", 7362 multilib_matches); 7363 } 7364 q++; 7365 } 7366 matches[i].len = q - matches[i].str; 7367 7368 matches[i].replace = ++q; 7369 while (*q != ';' && *q != '\0') 7370 { 7371 if (*q == ' ') 7372 goto invalid_matches; 7373 q++; 7374 } 7375 matches[i].rep_len = q - matches[i].replace; 7376 i++; 7377 if (*q == ';') 7378 q++; 7379 } 7380 7381 /* Now build a list of the replacement string for switches that we care 7382 about. Make sure we allocate at least one entry. This prevents 7383 xmalloc from calling fatal, and prevents us from re-executing this 7384 block of code. */ 7385 mswitches 7386 = XNEWVEC (struct mswitchstr, n_mdswitches + (n_switches ? n_switches : 1)); 7387 for (i = 0; i < n_switches; i++) 7388 if ((switches[i].live_cond & SWITCH_IGNORE) == 0) 7389 { 7390 int xlen = strlen (switches[i].part1); 7391 for (j = 0; j < cnt; j++) 7392 if (xlen == matches[j].len 7393 && ! strncmp (switches[i].part1, matches[j].str, xlen)) 7394 { 7395 mswitches[n_mswitches].str = matches[j].replace; 7396 mswitches[n_mswitches].len = matches[j].rep_len; 7397 mswitches[n_mswitches].replace = (char *) 0; 7398 mswitches[n_mswitches].rep_len = 0; 7399 n_mswitches++; 7400 break; 7401 } 7402 } 7403 7404 /* Add MULTILIB_DEFAULTS switches too, as long as they were not present 7405 on the command line nor any options mutually incompatible with 7406 them. */ 7407 for (i = 0; i < n_mdswitches; i++) 7408 { 7409 const char *r; 7410 7411 for (q = multilib_options; *q != '\0'; q++) 7412 { 7413 while (*q == ' ') 7414 q++; 7415 7416 r = q; 7417 while (strncmp (q, mdswitches[i].str, mdswitches[i].len) != 0 7418 || strchr (" /", q[mdswitches[i].len]) == NULL) 7419 { 7420 while (*q != ' ' && *q != '/' && *q != '\0') 7421 q++; 7422 if (*q != '/') 7423 break; 7424 q++; 7425 } 7426 7427 if (*q != ' ' && *q != '\0') 7428 { 7429 while (*r != ' ' && *r != '\0') 7430 { 7431 q = r; 7432 while (*q != ' ' && *q != '/' && *q != '\0') 7433 q++; 7434 7435 if (used_arg (r, q - r)) 7436 break; 7437 7438 if (*q != '/') 7439 { 7440 mswitches[n_mswitches].str = mdswitches[i].str; 7441 mswitches[n_mswitches].len = mdswitches[i].len; 7442 mswitches[n_mswitches].replace = (char *) 0; 7443 mswitches[n_mswitches].rep_len = 0; 7444 n_mswitches++; 7445 break; 7446 } 7447 7448 r = q + 1; 7449 } 7450 break; 7451 } 7452 } 7453 } 7454 } 7455 7456 for (i = 0; i < n_mswitches; i++) 7457 if (len == mswitches[i].len && ! strncmp (p, mswitches[i].str, len)) 7458 return 1; 7459 7460 return 0; 7461 } 7462 7463 static int 7464 default_arg (const char *p, int len) 7465 { 7466 int i; 7467 7468 for (i = 0; i < n_mdswitches; i++) 7469 if (len == mdswitches[i].len && ! strncmp (p, mdswitches[i].str, len)) 7470 return 1; 7471 7472 return 0; 7473 } 7474 7475 /* Work out the subdirectory to use based on the options. The format of 7476 multilib_select is a list of elements. Each element is a subdirectory 7477 name followed by a list of options followed by a semicolon. The format 7478 of multilib_exclusions is the same, but without the preceding 7479 directory. First gcc will check the exclusions, if none of the options 7480 beginning with an exclamation point are present, and all of the other 7481 options are present, then we will ignore this completely. Passing 7482 that, gcc will consider each multilib_select in turn using the same 7483 rules for matching the options. If a match is found, that subdirectory 7484 will be used. 7485 A subdirectory name is optionally followed by a colon and the corresponding 7486 multiarch name. */ 7487 7488 static void 7489 set_multilib_dir (void) 7490 { 7491 const char *p; 7492 unsigned int this_path_len; 7493 const char *this_path, *this_arg; 7494 const char *start, *end; 7495 int not_arg; 7496 int ok, ndfltok, first; 7497 7498 n_mdswitches = 0; 7499 start = multilib_defaults; 7500 while (*start == ' ' || *start == '\t') 7501 start++; 7502 while (*start != '\0') 7503 { 7504 n_mdswitches++; 7505 while (*start != ' ' && *start != '\t' && *start != '\0') 7506 start++; 7507 while (*start == ' ' || *start == '\t') 7508 start++; 7509 } 7510 7511 if (n_mdswitches) 7512 { 7513 int i = 0; 7514 7515 mdswitches = XNEWVEC (struct mdswitchstr, n_mdswitches); 7516 for (start = multilib_defaults; *start != '\0'; start = end + 1) 7517 { 7518 while (*start == ' ' || *start == '\t') 7519 start++; 7520 7521 if (*start == '\0') 7522 break; 7523 7524 for (end = start + 1; 7525 *end != ' ' && *end != '\t' && *end != '\0'; end++) 7526 ; 7527 7528 obstack_grow (&multilib_obstack, start, end - start); 7529 obstack_1grow (&multilib_obstack, 0); 7530 mdswitches[i].str = XOBFINISH (&multilib_obstack, const char *); 7531 mdswitches[i++].len = end - start; 7532 7533 if (*end == '\0') 7534 break; 7535 } 7536 } 7537 7538 p = multilib_exclusions; 7539 while (*p != '\0') 7540 { 7541 /* Ignore newlines. */ 7542 if (*p == '\n') 7543 { 7544 ++p; 7545 continue; 7546 } 7547 7548 /* Check the arguments. */ 7549 ok = 1; 7550 while (*p != ';') 7551 { 7552 if (*p == '\0') 7553 { 7554 invalid_exclusions: 7555 fatal_error ("multilib exclusions %qs is invalid", 7556 multilib_exclusions); 7557 } 7558 7559 if (! ok) 7560 { 7561 ++p; 7562 continue; 7563 } 7564 7565 this_arg = p; 7566 while (*p != ' ' && *p != ';') 7567 { 7568 if (*p == '\0') 7569 goto invalid_exclusions; 7570 ++p; 7571 } 7572 7573 if (*this_arg != '!') 7574 not_arg = 0; 7575 else 7576 { 7577 not_arg = 1; 7578 ++this_arg; 7579 } 7580 7581 ok = used_arg (this_arg, p - this_arg); 7582 if (not_arg) 7583 ok = ! ok; 7584 7585 if (*p == ' ') 7586 ++p; 7587 } 7588 7589 if (ok) 7590 return; 7591 7592 ++p; 7593 } 7594 7595 first = 1; 7596 p = multilib_select; 7597 7598 /* Append multilib reuse rules if any. With those rules, we can reuse 7599 one multilib for certain different options sets. */ 7600 if (strlen (multilib_reuse) > 0) 7601 p = concat (p, multilib_reuse, NULL); 7602 7603 while (*p != '\0') 7604 { 7605 /* Ignore newlines. */ 7606 if (*p == '\n') 7607 { 7608 ++p; 7609 continue; 7610 } 7611 7612 /* Get the initial path. */ 7613 this_path = p; 7614 while (*p != ' ') 7615 { 7616 if (*p == '\0') 7617 { 7618 invalid_select: 7619 fatal_error ("multilib select %qs %qs is invalid", 7620 multilib_select, multilib_reuse); 7621 } 7622 ++p; 7623 } 7624 this_path_len = p - this_path; 7625 7626 /* Check the arguments. */ 7627 ok = 1; 7628 ndfltok = 1; 7629 ++p; 7630 while (*p != ';') 7631 { 7632 if (*p == '\0') 7633 goto invalid_select; 7634 7635 if (! ok) 7636 { 7637 ++p; 7638 continue; 7639 } 7640 7641 this_arg = p; 7642 while (*p != ' ' && *p != ';') 7643 { 7644 if (*p == '\0') 7645 goto invalid_select; 7646 ++p; 7647 } 7648 7649 if (*this_arg != '!') 7650 not_arg = 0; 7651 else 7652 { 7653 not_arg = 1; 7654 ++this_arg; 7655 } 7656 7657 /* If this is a default argument, we can just ignore it. 7658 This is true even if this_arg begins with '!'. Beginning 7659 with '!' does not mean that this argument is necessarily 7660 inappropriate for this library: it merely means that 7661 there is a more specific library which uses this 7662 argument. If this argument is a default, we need not 7663 consider that more specific library. */ 7664 ok = used_arg (this_arg, p - this_arg); 7665 if (not_arg) 7666 ok = ! ok; 7667 7668 if (! ok) 7669 ndfltok = 0; 7670 7671 if (default_arg (this_arg, p - this_arg)) 7672 ok = 1; 7673 7674 if (*p == ' ') 7675 ++p; 7676 } 7677 7678 if (ok && first) 7679 { 7680 if (this_path_len != 1 7681 || this_path[0] != '.') 7682 { 7683 char *new_multilib_dir = XNEWVEC (char, this_path_len + 1); 7684 char *q; 7685 7686 strncpy (new_multilib_dir, this_path, this_path_len); 7687 new_multilib_dir[this_path_len] = '\0'; 7688 q = strchr (new_multilib_dir, ':'); 7689 if (q != NULL) 7690 *q = '\0'; 7691 multilib_dir = new_multilib_dir; 7692 } 7693 first = 0; 7694 } 7695 7696 if (ndfltok) 7697 { 7698 const char *q = this_path, *end = this_path + this_path_len; 7699 7700 while (q < end && *q != ':') 7701 q++; 7702 if (q < end) 7703 { 7704 const char *q2 = q + 1, *ml_end = end; 7705 char *new_multilib_os_dir; 7706 7707 while (q2 < end && *q2 != ':') 7708 q2++; 7709 if (*q2 == ':') 7710 ml_end = q2; 7711 new_multilib_os_dir = XNEWVEC (char, ml_end - q); 7712 memcpy (new_multilib_os_dir, q + 1, ml_end - q - 1); 7713 new_multilib_os_dir[ml_end - q - 1] = '\0'; 7714 multilib_os_dir = *new_multilib_os_dir ? new_multilib_os_dir : "."; 7715 7716 if (q2 < end && *q2 == ':') 7717 { 7718 char *new_multiarch_dir = XNEWVEC (char, end - q2); 7719 memcpy (new_multiarch_dir, q2 + 1, end - q2 - 1); 7720 new_multiarch_dir[end - q2 - 1] = '\0'; 7721 multiarch_dir = new_multiarch_dir; 7722 } 7723 break; 7724 } 7725 } 7726 7727 ++p; 7728 } 7729 7730 if (multilib_dir == NULL && multilib_os_dir != NULL 7731 && strcmp (multilib_os_dir, ".") == 0) 7732 { 7733 free (CONST_CAST (char *, multilib_os_dir)); 7734 multilib_os_dir = NULL; 7735 } 7736 else if (multilib_dir != NULL && multilib_os_dir == NULL) 7737 multilib_os_dir = multilib_dir; 7738 } 7739 7740 /* Print out the multiple library subdirectory selection 7741 information. This prints out a series of lines. Each line looks 7742 like SUBDIRECTORY;@OPTION@OPTION, with as many options as is 7743 required. Only the desired options are printed out, the negative 7744 matches. The options are print without a leading dash. There are 7745 no spaces to make it easy to use the information in the shell. 7746 Each subdirectory is printed only once. This assumes the ordering 7747 generated by the genmultilib script. Also, we leave out ones that match 7748 the exclusions. */ 7749 7750 static void 7751 print_multilib_info (void) 7752 { 7753 const char *p = multilib_select; 7754 const char *last_path = 0, *this_path; 7755 int skip; 7756 unsigned int last_path_len = 0; 7757 7758 while (*p != '\0') 7759 { 7760 skip = 0; 7761 /* Ignore newlines. */ 7762 if (*p == '\n') 7763 { 7764 ++p; 7765 continue; 7766 } 7767 7768 /* Get the initial path. */ 7769 this_path = p; 7770 while (*p != ' ') 7771 { 7772 if (*p == '\0') 7773 { 7774 invalid_select: 7775 fatal_error ("multilib select %qs is invalid", multilib_select); 7776 } 7777 7778 ++p; 7779 } 7780 7781 /* When --disable-multilib was used but target defines 7782 MULTILIB_OSDIRNAMES, entries starting with .: (and not starting 7783 with .:: for multiarch configurations) are there just to find 7784 multilib_os_dir, so skip them from output. */ 7785 if (this_path[0] == '.' && this_path[1] == ':' && this_path[2] != ':') 7786 skip = 1; 7787 7788 /* Check for matches with the multilib_exclusions. We don't bother 7789 with the '!' in either list. If any of the exclusion rules match 7790 all of its options with the select rule, we skip it. */ 7791 { 7792 const char *e = multilib_exclusions; 7793 const char *this_arg; 7794 7795 while (*e != '\0') 7796 { 7797 int m = 1; 7798 /* Ignore newlines. */ 7799 if (*e == '\n') 7800 { 7801 ++e; 7802 continue; 7803 } 7804 7805 /* Check the arguments. */ 7806 while (*e != ';') 7807 { 7808 const char *q; 7809 int mp = 0; 7810 7811 if (*e == '\0') 7812 { 7813 invalid_exclusion: 7814 fatal_error ("multilib exclusion %qs is invalid", 7815 multilib_exclusions); 7816 } 7817 7818 if (! m) 7819 { 7820 ++e; 7821 continue; 7822 } 7823 7824 this_arg = e; 7825 7826 while (*e != ' ' && *e != ';') 7827 { 7828 if (*e == '\0') 7829 goto invalid_exclusion; 7830 ++e; 7831 } 7832 7833 q = p + 1; 7834 while (*q != ';') 7835 { 7836 const char *arg; 7837 int len = e - this_arg; 7838 7839 if (*q == '\0') 7840 goto invalid_select; 7841 7842 arg = q; 7843 7844 while (*q != ' ' && *q != ';') 7845 { 7846 if (*q == '\0') 7847 goto invalid_select; 7848 ++q; 7849 } 7850 7851 if (! strncmp (arg, this_arg, 7852 (len < q - arg) ? q - arg : len) 7853 || default_arg (this_arg, e - this_arg)) 7854 { 7855 mp = 1; 7856 break; 7857 } 7858 7859 if (*q == ' ') 7860 ++q; 7861 } 7862 7863 if (! mp) 7864 m = 0; 7865 7866 if (*e == ' ') 7867 ++e; 7868 } 7869 7870 if (m) 7871 { 7872 skip = 1; 7873 break; 7874 } 7875 7876 if (*e != '\0') 7877 ++e; 7878 } 7879 } 7880 7881 if (! skip) 7882 { 7883 /* If this is a duplicate, skip it. */ 7884 skip = (last_path != 0 7885 && (unsigned int) (p - this_path) == last_path_len 7886 && ! filename_ncmp (last_path, this_path, last_path_len)); 7887 7888 last_path = this_path; 7889 last_path_len = p - this_path; 7890 } 7891 7892 /* If this directory requires any default arguments, we can skip 7893 it. We will already have printed a directory identical to 7894 this one which does not require that default argument. */ 7895 if (! skip) 7896 { 7897 const char *q; 7898 7899 q = p + 1; 7900 while (*q != ';') 7901 { 7902 const char *arg; 7903 7904 if (*q == '\0') 7905 goto invalid_select; 7906 7907 if (*q == '!') 7908 arg = NULL; 7909 else 7910 arg = q; 7911 7912 while (*q != ' ' && *q != ';') 7913 { 7914 if (*q == '\0') 7915 goto invalid_select; 7916 ++q; 7917 } 7918 7919 if (arg != NULL 7920 && default_arg (arg, q - arg)) 7921 { 7922 skip = 1; 7923 break; 7924 } 7925 7926 if (*q == ' ') 7927 ++q; 7928 } 7929 } 7930 7931 if (! skip) 7932 { 7933 const char *p1; 7934 7935 for (p1 = last_path; p1 < p && *p1 != ':'; p1++) 7936 putchar (*p1); 7937 putchar (';'); 7938 } 7939 7940 ++p; 7941 while (*p != ';') 7942 { 7943 int use_arg; 7944 7945 if (*p == '\0') 7946 goto invalid_select; 7947 7948 if (skip) 7949 { 7950 ++p; 7951 continue; 7952 } 7953 7954 use_arg = *p != '!'; 7955 7956 if (use_arg) 7957 putchar ('@'); 7958 7959 while (*p != ' ' && *p != ';') 7960 { 7961 if (*p == '\0') 7962 goto invalid_select; 7963 if (use_arg) 7964 putchar (*p); 7965 ++p; 7966 } 7967 7968 if (*p == ' ') 7969 ++p; 7970 } 7971 7972 if (! skip) 7973 { 7974 /* If there are extra options, print them now. */ 7975 if (multilib_extra && *multilib_extra) 7976 { 7977 int print_at = TRUE; 7978 const char *q; 7979 7980 for (q = multilib_extra; *q != '\0'; q++) 7981 { 7982 if (*q == ' ') 7983 print_at = TRUE; 7984 else 7985 { 7986 if (print_at) 7987 putchar ('@'); 7988 putchar (*q); 7989 print_at = FALSE; 7990 } 7991 } 7992 } 7993 7994 putchar ('\n'); 7995 } 7996 7997 ++p; 7998 } 7999 } 8000 8001 /* getenv built-in spec function. 8002 8003 Returns the value of the environment variable given by its first 8004 argument, concatenated with the second argument. If the 8005 environment variable is not defined, a fatal error is issued. */ 8006 8007 static const char * 8008 getenv_spec_function (int argc, const char **argv) 8009 { 8010 char *value; 8011 char *result; 8012 char *ptr; 8013 size_t len; 8014 8015 if (argc != 2) 8016 return NULL; 8017 8018 value = getenv (argv[0]); 8019 if (!value) 8020 fatal_error ("environment variable %qs not defined", argv[0]); 8021 8022 /* We have to escape every character of the environment variable so 8023 they are not interpreted as active spec characters. A 8024 particularly painful case is when we are reading a variable 8025 holding a windows path complete with \ separators. */ 8026 len = strlen (value) * 2 + strlen (argv[1]) + 1; 8027 result = XNEWVAR (char, len); 8028 for (ptr = result; *value; ptr += 2) 8029 { 8030 ptr[0] = '\\'; 8031 ptr[1] = *value++; 8032 } 8033 8034 strcpy (ptr, argv[1]); 8035 8036 return result; 8037 } 8038 8039 /* if-exists built-in spec function. 8040 8041 Checks to see if the file specified by the absolute pathname in 8042 ARGS exists. Returns that pathname if found. 8043 8044 The usual use for this function is to check for a library file 8045 (whose name has been expanded with %s). */ 8046 8047 static const char * 8048 if_exists_spec_function (int argc, const char **argv) 8049 { 8050 /* Must have only one argument. */ 8051 if (argc == 1 && IS_ABSOLUTE_PATH (argv[0]) && ! access (argv[0], R_OK)) 8052 return argv[0]; 8053 8054 return NULL; 8055 } 8056 8057 /* if-exists-else built-in spec function. 8058 8059 This is like if-exists, but takes an additional argument which 8060 is returned if the first argument does not exist. */ 8061 8062 static const char * 8063 if_exists_else_spec_function (int argc, const char **argv) 8064 { 8065 /* Must have exactly two arguments. */ 8066 if (argc != 2) 8067 return NULL; 8068 8069 if (IS_ABSOLUTE_PATH (argv[0]) && ! access (argv[0], R_OK)) 8070 return argv[0]; 8071 8072 return argv[1]; 8073 } 8074 8075 /* replace-outfile built-in spec function. 8076 8077 This looks for the first argument in the outfiles array's name and 8078 replaces it with the second argument. */ 8079 8080 static const char * 8081 replace_outfile_spec_function (int argc, const char **argv) 8082 { 8083 int i; 8084 /* Must have exactly two arguments. */ 8085 if (argc != 2) 8086 abort (); 8087 8088 for (i = 0; i < n_infiles; i++) 8089 { 8090 if (outfiles[i] && !filename_cmp (outfiles[i], argv[0])) 8091 outfiles[i] = xstrdup (argv[1]); 8092 } 8093 return NULL; 8094 } 8095 8096 /* remove-outfile built-in spec function. 8097 * 8098 * This looks for the first argument in the outfiles array's name and 8099 * removes it. */ 8100 8101 static const char * 8102 remove_outfile_spec_function (int argc, const char **argv) 8103 { 8104 int i; 8105 /* Must have exactly one argument. */ 8106 if (argc != 1) 8107 abort (); 8108 8109 for (i = 0; i < n_infiles; i++) 8110 { 8111 if (outfiles[i] && !filename_cmp (outfiles[i], argv[0])) 8112 outfiles[i] = NULL; 8113 } 8114 return NULL; 8115 } 8116 8117 /* Given two version numbers, compares the two numbers. 8118 A version number must match the regular expression 8119 ([1-9][0-9]*|0)(\.([1-9][0-9]*|0))* 8120 */ 8121 static int 8122 compare_version_strings (const char *v1, const char *v2) 8123 { 8124 int rresult; 8125 regex_t r; 8126 8127 if (regcomp (&r, "^([1-9][0-9]*|0)(\\.([1-9][0-9]*|0))*$", 8128 REG_EXTENDED | REG_NOSUB) != 0) 8129 abort (); 8130 rresult = regexec (&r, v1, 0, NULL, 0); 8131 if (rresult == REG_NOMATCH) 8132 fatal_error ("invalid version number %qs", v1); 8133 else if (rresult != 0) 8134 abort (); 8135 rresult = regexec (&r, v2, 0, NULL, 0); 8136 if (rresult == REG_NOMATCH) 8137 fatal_error ("invalid version number %qs", v2); 8138 else if (rresult != 0) 8139 abort (); 8140 8141 return strverscmp (v1, v2); 8142 } 8143 8144 8145 /* version_compare built-in spec function. 8146 8147 This takes an argument of the following form: 8148 8149 <comparison-op> <arg1> [<arg2>] <switch> <result> 8150 8151 and produces "result" if the comparison evaluates to true, 8152 and nothing if it doesn't. 8153 8154 The supported <comparison-op> values are: 8155 8156 >= true if switch is a later (or same) version than arg1 8157 !> opposite of >= 8158 < true if switch is an earlier version than arg1 8159 !< opposite of < 8160 >< true if switch is arg1 or later, and earlier than arg2 8161 <> true if switch is earlier than arg1 or is arg2 or later 8162 8163 If the switch is not present, the condition is false unless 8164 the first character of the <comparison-op> is '!'. 8165 8166 For example, 8167 %:version-compare(>= 10.3 mmacosx-version-min= -lmx) 8168 adds -lmx if -mmacosx-version-min=10.3.9 was passed. */ 8169 8170 static const char * 8171 version_compare_spec_function (int argc, const char **argv) 8172 { 8173 int comp1, comp2; 8174 size_t switch_len; 8175 const char *switch_value = NULL; 8176 int nargs = 1, i; 8177 bool result; 8178 8179 if (argc < 3) 8180 fatal_error ("too few arguments to %%:version-compare"); 8181 if (argv[0][0] == '\0') 8182 abort (); 8183 if ((argv[0][1] == '<' || argv[0][1] == '>') && argv[0][0] != '!') 8184 nargs = 2; 8185 if (argc != nargs + 3) 8186 fatal_error ("too many arguments to %%:version-compare"); 8187 8188 switch_len = strlen (argv[nargs + 1]); 8189 for (i = 0; i < n_switches; i++) 8190 if (!strncmp (switches[i].part1, argv[nargs + 1], switch_len) 8191 && check_live_switch (i, switch_len)) 8192 switch_value = switches[i].part1 + switch_len; 8193 8194 if (switch_value == NULL) 8195 comp1 = comp2 = -1; 8196 else 8197 { 8198 comp1 = compare_version_strings (switch_value, argv[1]); 8199 if (nargs == 2) 8200 comp2 = compare_version_strings (switch_value, argv[2]); 8201 else 8202 comp2 = -1; /* This value unused. */ 8203 } 8204 8205 switch (argv[0][0] << 8 | argv[0][1]) 8206 { 8207 case '>' << 8 | '=': 8208 result = comp1 >= 0; 8209 break; 8210 case '!' << 8 | '<': 8211 result = comp1 >= 0 || switch_value == NULL; 8212 break; 8213 case '<' << 8: 8214 result = comp1 < 0; 8215 break; 8216 case '!' << 8 | '>': 8217 result = comp1 < 0 || switch_value == NULL; 8218 break; 8219 case '>' << 8 | '<': 8220 result = comp1 >= 0 && comp2 < 0; 8221 break; 8222 case '<' << 8 | '>': 8223 result = comp1 < 0 || comp2 >= 0; 8224 break; 8225 8226 default: 8227 fatal_error ("unknown operator %qs in %%:version-compare", argv[0]); 8228 } 8229 if (! result) 8230 return NULL; 8231 8232 return argv[nargs + 2]; 8233 } 8234 8235 /* %:include builtin spec function. This differs from %include in that it 8236 can be nested inside a spec, and thus be conditionalized. It takes 8237 one argument, the filename, and looks for it in the startfile path. 8238 The result is always NULL, i.e. an empty expansion. */ 8239 8240 static const char * 8241 include_spec_function (int argc, const char **argv) 8242 { 8243 char *file; 8244 8245 if (argc != 1) 8246 abort (); 8247 8248 file = find_a_file (&startfile_prefixes, argv[0], R_OK, true); 8249 read_specs (file ? file : argv[0], false, false); 8250 8251 return NULL; 8252 } 8253 8254 /* %:find-file spec function. This function replaces its argument by 8255 the file found through find_file, that is the -print-file-name gcc 8256 program option. */ 8257 static const char * 8258 find_file_spec_function (int argc, const char **argv) 8259 { 8260 const char *file; 8261 8262 if (argc != 1) 8263 abort (); 8264 8265 file = find_file (argv[0]); 8266 return file; 8267 } 8268 8269 8270 /* %:find-plugindir spec function. This function replaces its argument 8271 by the -iplugindir=<dir> option. `dir' is found through find_file, that 8272 is the -print-file-name gcc program option. */ 8273 static const char * 8274 find_plugindir_spec_function (int argc, const char **argv ATTRIBUTE_UNUSED) 8275 { 8276 const char *option; 8277 8278 if (argc != 0) 8279 abort (); 8280 8281 option = concat ("-iplugindir=", find_file ("plugin"), NULL); 8282 return option; 8283 } 8284 8285 8286 /* %:print-asm-header spec function. Print a banner to say that the 8287 following output is from the assembler. */ 8288 8289 static const char * 8290 print_asm_header_spec_function (int arg ATTRIBUTE_UNUSED, 8291 const char **argv ATTRIBUTE_UNUSED) 8292 { 8293 printf (_("Assembler options\n=================\n\n")); 8294 printf (_("Use \"-Wa,OPTION\" to pass \"OPTION\" to the assembler.\n\n")); 8295 fflush (stdout); 8296 return NULL; 8297 } 8298 8299 /* Get a random number for -frandom-seed */ 8300 8301 static unsigned HOST_WIDE_INT 8302 get_random_number (void) 8303 { 8304 unsigned HOST_WIDE_INT ret = 0; 8305 int fd; 8306 8307 fd = open ("/dev/urandom", O_RDONLY); 8308 if (fd >= 0) 8309 { 8310 read (fd, &ret, sizeof (HOST_WIDE_INT)); 8311 close (fd); 8312 if (ret) 8313 return ret; 8314 } 8315 8316 /* Get some more or less random data. */ 8317 #ifdef HAVE_GETTIMEOFDAY 8318 { 8319 struct timeval tv; 8320 8321 gettimeofday (&tv, NULL); 8322 ret = tv.tv_sec * 1000 + tv.tv_usec / 1000; 8323 } 8324 #else 8325 { 8326 time_t now = time (NULL); 8327 8328 if (now != (time_t)-1) 8329 ret = (unsigned) now; 8330 } 8331 #endif 8332 8333 return ret ^ getpid(); 8334 } 8335 8336 /* %:compare-debug-dump-opt spec function. Save the last argument, 8337 expected to be the last -fdump-final-insns option, or generate a 8338 temporary. */ 8339 8340 static const char * 8341 compare_debug_dump_opt_spec_function (int arg, 8342 const char **argv ATTRIBUTE_UNUSED) 8343 { 8344 char *ret; 8345 char *name; 8346 int which; 8347 static char random_seed[HOST_BITS_PER_WIDE_INT / 4 + 3]; 8348 8349 if (arg != 0) 8350 fatal_error ("too many arguments to %%:compare-debug-dump-opt"); 8351 8352 do_spec_2 ("%{fdump-final-insns=*:%*}"); 8353 do_spec_1 (" ", 0, NULL); 8354 8355 if (argbuf.length () > 0 8356 && strcmp (argv[argbuf.length () - 1], ".")) 8357 { 8358 if (!compare_debug) 8359 return NULL; 8360 8361 name = xstrdup (argv[argbuf.length () - 1]); 8362 ret = NULL; 8363 } 8364 else 8365 { 8366 const char *ext = NULL; 8367 8368 if (argbuf.length () > 0) 8369 { 8370 do_spec_2 ("%{o*:%*}%{!o:%{!S:%b%O}%{S:%b.s}}"); 8371 ext = ".gkd"; 8372 } 8373 else if (!compare_debug) 8374 return NULL; 8375 else 8376 do_spec_2 ("%g.gkd"); 8377 8378 do_spec_1 (" ", 0, NULL); 8379 8380 gcc_assert (argbuf.length () > 0); 8381 8382 name = concat (argbuf.last (), ext, NULL); 8383 8384 ret = concat ("-fdump-final-insns=", name, NULL); 8385 } 8386 8387 which = compare_debug < 0; 8388 debug_check_temp_file[which] = name; 8389 8390 if (!which) 8391 { 8392 unsigned HOST_WIDE_INT value = get_random_number (); 8393 8394 sprintf (random_seed, HOST_WIDE_INT_PRINT_HEX, value); 8395 } 8396 8397 if (*random_seed) 8398 { 8399 char *tmp = ret; 8400 ret = concat ("%{!frandom-seed=*:-frandom-seed=", random_seed, "} ", 8401 ret, NULL); 8402 free (tmp); 8403 } 8404 8405 if (which) 8406 *random_seed = 0; 8407 8408 return ret; 8409 } 8410 8411 static const char *debug_auxbase_opt; 8412 8413 /* %:compare-debug-self-opt spec function. Expands to the options 8414 that are to be passed in the second compilation of 8415 compare-debug. */ 8416 8417 static const char * 8418 compare_debug_self_opt_spec_function (int arg, 8419 const char **argv ATTRIBUTE_UNUSED) 8420 { 8421 if (arg != 0) 8422 fatal_error ("too many arguments to %%:compare-debug-self-opt"); 8423 8424 if (compare_debug >= 0) 8425 return NULL; 8426 8427 do_spec_2 ("%{c|S:%{o*:%*}}"); 8428 do_spec_1 (" ", 0, NULL); 8429 8430 if (argbuf.length () > 0) 8431 debug_auxbase_opt = concat ("-auxbase-strip ", 8432 argbuf.last (), 8433 NULL); 8434 else 8435 debug_auxbase_opt = NULL; 8436 8437 return concat ("\ 8438 %<o %<MD %<MMD %<MF* %<MG %<MP %<MQ* %<MT* \ 8439 %<fdump-final-insns=* -w -S -o %j \ 8440 %{!fcompare-debug-second:-fcompare-debug-second} \ 8441 ", compare_debug_opt, NULL); 8442 } 8443 8444 /* %:compare-debug-auxbase-opt spec function. Expands to the auxbase 8445 options that are to be passed in the second compilation of 8446 compare-debug. It expects, as an argument, the basename of the 8447 current input file name, with the .gk suffix appended to it. */ 8448 8449 static const char * 8450 compare_debug_auxbase_opt_spec_function (int arg, 8451 const char **argv) 8452 { 8453 char *name; 8454 int len; 8455 8456 if (arg == 0) 8457 fatal_error ("too few arguments to %%:compare-debug-auxbase-opt"); 8458 8459 if (arg != 1) 8460 fatal_error ("too many arguments to %%:compare-debug-auxbase-opt"); 8461 8462 if (compare_debug >= 0) 8463 return NULL; 8464 8465 len = strlen (argv[0]); 8466 if (len < 3 || strcmp (argv[0] + len - 3, ".gk") != 0) 8467 fatal_error ("argument to %%:compare-debug-auxbase-opt " 8468 "does not end in .gk"); 8469 8470 if (debug_auxbase_opt) 8471 return debug_auxbase_opt; 8472 8473 #define OPT "-auxbase " 8474 8475 len -= 3; 8476 name = (char*) xmalloc (sizeof (OPT) + len); 8477 memcpy (name, OPT, sizeof (OPT) - 1); 8478 memcpy (name + sizeof (OPT) - 1, argv[0], len); 8479 name[sizeof (OPT) - 1 + len] = '\0'; 8480 8481 #undef OPT 8482 8483 return name; 8484 } 8485 8486 /* %:pass-through-libs spec function. Finds all -l options and input 8487 file names in the lib spec passed to it, and makes a list of them 8488 prepended with the plugin option to cause them to be passed through 8489 to the final link after all the new object files have been added. */ 8490 8491 const char * 8492 pass_through_libs_spec_func (int argc, const char **argv) 8493 { 8494 char *prepended = xstrdup (" "); 8495 int n; 8496 /* Shlemiel the painter's algorithm. Innately horrible, but at least 8497 we know that there will never be more than a handful of strings to 8498 concat, and it's only once per run, so it's not worth optimising. */ 8499 for (n = 0; n < argc; n++) 8500 { 8501 char *old = prepended; 8502 /* Anything that isn't an option is a full path to an output 8503 file; pass it through if it ends in '.a'. Among options, 8504 pass only -l. */ 8505 if (argv[n][0] == '-' && argv[n][1] == 'l') 8506 { 8507 const char *lopt = argv[n] + 2; 8508 /* Handle both joined and non-joined -l options. If for any 8509 reason there's a trailing -l with no joined or following 8510 arg just discard it. */ 8511 if (!*lopt && ++n >= argc) 8512 break; 8513 else if (!*lopt) 8514 lopt = argv[n]; 8515 prepended = concat (prepended, "-plugin-opt=-pass-through=-l", 8516 lopt, " ", NULL); 8517 } 8518 else if (!strcmp (".a", argv[n] + strlen (argv[n]) - 2)) 8519 { 8520 prepended = concat (prepended, "-plugin-opt=-pass-through=", 8521 argv[n], " ", NULL); 8522 } 8523 if (prepended != old) 8524 free (old); 8525 } 8526 return prepended; 8527 } 8528 8529 /* %:replace-extension spec function. Replaces the extension of the 8530 first argument with the second argument. */ 8531 8532 const char * 8533 replace_extension_spec_func (int argc, const char **argv) 8534 { 8535 char *name; 8536 char *p; 8537 char *result; 8538 int i; 8539 8540 if (argc != 2) 8541 fatal_error ("too few arguments to %%:replace-extension"); 8542 8543 name = xstrdup (argv[0]); 8544 8545 for (i = strlen(name) - 1; i >= 0; i--) 8546 if (IS_DIR_SEPARATOR (name[i])) 8547 break; 8548 8549 p = strrchr (name + i + 1, '.'); 8550 if (p != NULL) 8551 *p = '\0'; 8552 8553 result = concat (name, argv[1], NULL); 8554 8555 free (name); 8556 return result; 8557 } 8558 8559 /* Insert backslash before spaces in ORIG (usually a file path), to 8560 avoid being broken by spec parser. 8561 8562 This function is needed as do_spec_1 treats white space (' ' and '\t') 8563 as the end of an argument. But in case of -plugin /usr/gcc install/xxx.so, 8564 the file name should be treated as a single argument rather than being 8565 broken into multiple. Solution is to insert '\\' before the space in a 8566 file name. 8567 8568 This function converts and only converts all occurrence of ' ' 8569 to '\\' + ' ' and '\t' to '\\' + '\t'. For example: 8570 "a b" -> "a\\ b" 8571 "a b" -> "a\\ \\ b" 8572 "a\tb" -> "a\\\tb" 8573 "a\\ b" -> "a\\\\ b" 8574 8575 orig: input null-terminating string that was allocated by xalloc. The 8576 memory it points to might be freed in this function. Behavior undefined 8577 if ORIG wasn't xalloced or was freed already at entry. 8578 8579 Return: ORIG if no conversion needed. Otherwise a newly allocated string 8580 that was converted from ORIG. */ 8581 8582 static char * 8583 convert_white_space (char *orig) 8584 { 8585 int len, number_of_space = 0; 8586 8587 for (len = 0; orig[len]; len++) 8588 if (orig[len] == ' ' || orig[len] == '\t') number_of_space++; 8589 8590 if (number_of_space) 8591 { 8592 char *new_spec = (char *) xmalloc (len + number_of_space + 1); 8593 int j, k; 8594 for (j = 0, k = 0; j <= len; j++, k++) 8595 { 8596 if (orig[j] == ' ' || orig[j] == '\t') 8597 new_spec[k++] = '\\'; 8598 new_spec[k] = orig[j]; 8599 } 8600 free (orig); 8601 return new_spec; 8602 } 8603 else 8604 return orig; 8605 } 8606