1 /* Compiler driver program that can handle many languages. 2 Copyright (C) 1987, 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 3 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 4 2010, 2011, 2012 5 Free Software Foundation, Inc. 6 7 This file is part of GCC. 8 9 GCC is free software; you can redistribute it and/or modify it under 10 the terms of the GNU General Public License as published by the Free 11 Software Foundation; either version 3, or (at your option) any later 12 version. 13 14 GCC is distributed in the hope that it will be useful, but WITHOUT ANY 15 WARRANTY; without even the implied warranty of MERCHANTABILITY or 16 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 17 for more details. 18 19 You should have received a copy of the GNU General Public License 20 along with GCC; see the file COPYING3. If not see 21 <http://www.gnu.org/licenses/>. */ 22 23 /* This program is the user interface to the C compiler and possibly to 24 other compilers. It is used because compilation is a complicated procedure 25 which involves running several programs and passing temporary files between 26 them, forwarding the users switches to those programs selectively, 27 and deleting the temporary files at the end. 28 29 CC recognizes how to compile each input file by suffixes in the file names. 30 Once it knows which kind of compilation to perform, the procedure for 31 compilation is specified by a string called a "spec". */ 32 33 #include "config.h" 34 #include "system.h" 35 #include "coretypes.h" 36 #include "multilib.h" /* before tm.h */ 37 #include "tm.h" 38 #include "xregex.h" 39 #include "obstack.h" 40 #include "intl.h" 41 #include "prefix.h" 42 #include "gcc.h" 43 #include "diagnostic.h" 44 #include "flags.h" 45 #include "opts.h" 46 #include "params.h" 47 #include "vec.h" 48 #include "filenames.h" 49 50 /* By default there is no special suffix for target executables. */ 51 /* FIXME: when autoconf is fixed, remove the host check - dj */ 52 #if defined(TARGET_EXECUTABLE_SUFFIX) && defined(HOST_EXECUTABLE_SUFFIX) 53 #define HAVE_TARGET_EXECUTABLE_SUFFIX 54 #endif 55 56 /* By default there is no special suffix for host executables. */ 57 #ifdef HOST_EXECUTABLE_SUFFIX 58 #define HAVE_HOST_EXECUTABLE_SUFFIX 59 #else 60 #define HOST_EXECUTABLE_SUFFIX "" 61 #endif 62 63 /* By default, the suffix for target object files is ".o". */ 64 #ifdef TARGET_OBJECT_SUFFIX 65 #define HAVE_TARGET_OBJECT_SUFFIX 66 #else 67 #define TARGET_OBJECT_SUFFIX ".o" 68 #endif 69 70 static const char dir_separator_str[] = { DIR_SEPARATOR, 0 }; 71 72 /* Most every one is fine with LIBRARY_PATH. For some, it conflicts. */ 73 #ifndef LIBRARY_PATH_ENV 74 #define LIBRARY_PATH_ENV "LIBRARY_PATH" 75 #endif 76 77 /* If a stage of compilation returns an exit status >= 1, 78 compilation of that file ceases. */ 79 80 #define MIN_FATAL_STATUS 1 81 82 /* Flag set by cppspec.c to 1. */ 83 int is_cpp_driver; 84 85 /* Flag set to nonzero if an @file argument has been supplied to gcc. */ 86 static bool at_file_supplied; 87 88 /* Definition of string containing the arguments given to configure. */ 89 #include "configargs.h" 90 91 /* Flag saying to print the command line options understood by gcc and its 92 sub-processes. */ 93 94 static int print_help_list; 95 96 /* Flag saying to print the version of gcc and its sub-processes. */ 97 98 static int print_version; 99 100 /* Flag indicating whether we should ONLY print the command and 101 arguments (like verbose_flag) without executing the command. 102 Displayed arguments are quoted so that the generated command 103 line is suitable for execution. This is intended for use in 104 shell scripts to capture the driver-generated command line. */ 105 static int verbose_only_flag; 106 107 /* Flag indicating how to print command line options of sub-processes. */ 108 109 static int print_subprocess_help; 110 111 /* Whether we should report subprocess execution times to a file. */ 112 113 FILE *report_times_to_file = NULL; 114 115 /* Nonzero means place this string before uses of /, so that include 116 and library files can be found in an alternate location. */ 117 118 #ifdef TARGET_SYSTEM_ROOT 119 static const char *target_system_root = TARGET_SYSTEM_ROOT; 120 #else 121 static const char *target_system_root = 0; 122 #endif 123 124 /* Nonzero means pass the updated target_system_root to the compiler. */ 125 126 static int target_system_root_changed; 127 128 /* Nonzero means append this string to target_system_root. */ 129 130 static const char *target_sysroot_suffix = 0; 131 132 /* Nonzero means append this string to target_system_root for headers. */ 133 134 static const char *target_sysroot_hdrs_suffix = 0; 135 136 /* Nonzero means write "temp" files in source directory 137 and use the source file's name in them, and don't delete them. */ 138 139 static enum save_temps { 140 SAVE_TEMPS_NONE, /* no -save-temps */ 141 SAVE_TEMPS_CWD, /* -save-temps in current directory */ 142 SAVE_TEMPS_OBJ /* -save-temps in object directory */ 143 } save_temps_flag; 144 145 /* Output file to use to get the object directory for -save-temps=obj */ 146 static char *save_temps_prefix = 0; 147 static size_t save_temps_length = 0; 148 149 /* The compiler version. */ 150 151 static const char *compiler_version; 152 153 /* The target version. */ 154 155 static const char *const spec_version = DEFAULT_TARGET_VERSION; 156 157 /* The target machine. */ 158 159 static const char *spec_machine = DEFAULT_TARGET_MACHINE; 160 161 /* Nonzero if cross-compiling. 162 When -b is used, the value comes from the `specs' file. */ 163 164 #ifdef CROSS_DIRECTORY_STRUCTURE 165 static const char *cross_compile = "1"; 166 #else 167 static const char *cross_compile = "0"; 168 #endif 169 170 /* Greatest exit code of sub-processes that has been encountered up to 171 now. */ 172 static int greatest_status = 1; 173 174 /* This is the obstack which we use to allocate many strings. */ 175 176 static struct obstack obstack; 177 178 /* This is the obstack to build an environment variable to pass to 179 collect2 that describes all of the relevant switches of what to 180 pass the compiler in building the list of pointers to constructors 181 and destructors. */ 182 183 static struct obstack collect_obstack; 184 185 /* Forward declaration for prototypes. */ 186 struct path_prefix; 187 struct prefix_list; 188 189 static void init_spec (void); 190 static void store_arg (const char *, int, int); 191 static void insert_wrapper (const char *); 192 static char *load_specs (const char *); 193 static void read_specs (const char *, int); 194 static void set_spec (const char *, const char *); 195 static struct compiler *lookup_compiler (const char *, size_t, const char *); 196 static char *build_search_list (const struct path_prefix *, const char *, 197 bool, bool); 198 static void xputenv (const char *); 199 static void putenv_from_prefixes (const struct path_prefix *, const char *, 200 bool); 201 static int access_check (const char *, int); 202 static char *find_a_file (const struct path_prefix *, const char *, int, bool); 203 static void add_prefix (struct path_prefix *, const char *, const char *, 204 int, int, int); 205 static void add_sysrooted_prefix (struct path_prefix *, const char *, 206 const char *, int, int, int); 207 static char *skip_whitespace (char *); 208 static void delete_if_ordinary (const char *); 209 static void delete_temp_files (void); 210 static void delete_failure_queue (void); 211 static void clear_failure_queue (void); 212 static int check_live_switch (int, int); 213 static const char *handle_braces (const char *); 214 static inline bool input_suffix_matches (const char *, const char *); 215 static inline bool switch_matches (const char *, const char *, int); 216 static inline void mark_matching_switches (const char *, const char *, int); 217 static inline void process_marked_switches (void); 218 static const char *process_brace_body (const char *, const char *, const char *, int, int); 219 static const struct spec_function *lookup_spec_function (const char *); 220 static const char *eval_spec_function (const char *, const char *); 221 static const char *handle_spec_function (const char *); 222 static char *save_string (const char *, int); 223 static void set_collect_gcc_options (void); 224 static int do_spec_1 (const char *, int, const char *); 225 static int do_spec_2 (const char *); 226 static void do_option_spec (const char *, const char *); 227 static void do_self_spec (const char *); 228 static const char *find_file (const char *); 229 static int is_directory (const char *, bool); 230 static const char *validate_switches (const char *); 231 static void validate_all_switches (void); 232 static inline void validate_switches_from_spec (const char *); 233 static void give_switch (int, int); 234 static int used_arg (const char *, int); 235 static int default_arg (const char *, int); 236 static void set_multilib_dir (void); 237 static void print_multilib_info (void); 238 static void perror_with_name (const char *); 239 static void display_help (void); 240 static void add_preprocessor_option (const char *, int); 241 static void add_assembler_option (const char *, int); 242 static void add_linker_option (const char *, int); 243 static void process_command (unsigned int, struct cl_decoded_option *); 244 static int execute (void); 245 static void alloc_args (void); 246 static void clear_args (void); 247 static void fatal_signal (int); 248 #if defined(ENABLE_SHARED_LIBGCC) && !defined(REAL_LIBGCC_SPEC) 249 static void init_gcc_specs (struct obstack *, const char *, const char *, 250 const char *); 251 #endif 252 #if defined(HAVE_TARGET_OBJECT_SUFFIX) || defined(HAVE_TARGET_EXECUTABLE_SUFFIX) 253 static const char *convert_filename (const char *, int, int); 254 #endif 255 256 static const char *getenv_spec_function (int, const char **); 257 static const char *if_exists_spec_function (int, const char **); 258 static const char *if_exists_else_spec_function (int, const char **); 259 static const char *replace_outfile_spec_function (int, const char **); 260 static const char *remove_outfile_spec_function (int, const char **); 261 static const char *version_compare_spec_function (int, const char **); 262 static const char *include_spec_function (int, const char **); 263 static const char *find_file_spec_function (int, const char **); 264 static const char *find_plugindir_spec_function (int, const char **); 265 static const char *print_asm_header_spec_function (int, const char **); 266 static const char *compare_debug_dump_opt_spec_function (int, const char **); 267 static const char *compare_debug_self_opt_spec_function (int, const char **); 268 static const char *compare_debug_auxbase_opt_spec_function (int, const char **); 269 static const char *pass_through_libs_spec_func (int, const char **); 270 271 /* The Specs Language 272 273 Specs are strings containing lines, each of which (if not blank) 274 is made up of a program name, and arguments separated by spaces. 275 The program name must be exact and start from root, since no path 276 is searched and it is unreliable to depend on the current working directory. 277 Redirection of input or output is not supported; the subprograms must 278 accept filenames saying what files to read and write. 279 280 In addition, the specs can contain %-sequences to substitute variable text 281 or for conditional text. Here is a table of all defined %-sequences. 282 Note that spaces are not generated automatically around the results of 283 expanding these sequences; therefore, you can concatenate them together 284 or with constant text in a single argument. 285 286 %% substitute one % into the program name or argument. 287 %i substitute the name of the input file being processed. 288 %b substitute the basename of the input file being processed. 289 This is the substring up to (and not including) the last period 290 and not including the directory unless -save-temps was specified 291 to put temporaries in a different location. 292 %B same as %b, but include the file suffix (text after the last period). 293 %gSUFFIX 294 substitute a file name that has suffix SUFFIX and is chosen 295 once per compilation, and mark the argument a la %d. To reduce 296 exposure to denial-of-service attacks, the file name is now 297 chosen in a way that is hard to predict even when previously 298 chosen file names are known. For example, `%g.s ... %g.o ... %g.s' 299 might turn into `ccUVUUAU.s ccXYAXZ12.o ccUVUUAU.s'. SUFFIX matches 300 the regexp "[.0-9A-Za-z]*%O"; "%O" is treated exactly as if it 301 had been pre-processed. Previously, %g was simply substituted 302 with a file name chosen once per compilation, without regard 303 to any appended suffix (which was therefore treated just like 304 ordinary text), making such attacks more likely to succeed. 305 %|SUFFIX 306 like %g, but if -pipe is in effect, expands simply to "-". 307 %mSUFFIX 308 like %g, but if -pipe is in effect, expands to nothing. (We have both 309 %| and %m to accommodate differences between system assemblers; see 310 the AS_NEEDS_DASH_FOR_PIPED_INPUT target macro.) 311 %uSUFFIX 312 like %g, but generates a new temporary file name even if %uSUFFIX 313 was already seen. 314 %USUFFIX 315 substitutes the last file name generated with %uSUFFIX, generating a 316 new one if there is no such last file name. In the absence of any 317 %uSUFFIX, this is just like %gSUFFIX, except they don't share 318 the same suffix "space", so `%g.s ... %U.s ... %g.s ... %U.s' 319 would involve the generation of two distinct file names, one 320 for each `%g.s' and another for each `%U.s'. Previously, %U was 321 simply substituted with a file name chosen for the previous %u, 322 without regard to any appended suffix. 323 %jSUFFIX 324 substitutes the name of the HOST_BIT_BUCKET, if any, and if it is 325 writable, and if save-temps is off; otherwise, substitute the name 326 of a temporary file, just like %u. This temporary file is not 327 meant for communication between processes, but rather as a junk 328 disposal mechanism. 329 %.SUFFIX 330 substitutes .SUFFIX for the suffixes of a matched switch's args when 331 it is subsequently output with %*. SUFFIX is terminated by the next 332 space or %. 333 %d marks the argument containing or following the %d as a 334 temporary file name, so that that file will be deleted if GCC exits 335 successfully. Unlike %g, this contributes no text to the argument. 336 %w marks the argument containing or following the %w as the 337 "output file" of this compilation. This puts the argument 338 into the sequence of arguments that %o will substitute later. 339 %V indicates that this compilation produces no "output file". 340 %W{...} 341 like %{...} but mark last argument supplied within 342 as a file to be deleted on failure. 343 %o substitutes the names of all the output files, with spaces 344 automatically placed around them. You should write spaces 345 around the %o as well or the results are undefined. 346 %o is for use in the specs for running the linker. 347 Input files whose names have no recognized suffix are not compiled 348 at all, but they are included among the output files, so they will 349 be linked. 350 %O substitutes the suffix for object files. Note that this is 351 handled specially when it immediately follows %g, %u, or %U 352 (with or without a suffix argument) because of the need for 353 those to form complete file names. The handling is such that 354 %O is treated exactly as if it had already been substituted, 355 except that %g, %u, and %U do not currently support additional 356 SUFFIX characters following %O as they would following, for 357 example, `.o'. 358 %I Substitute any of -iprefix (made from GCC_EXEC_PREFIX), -isysroot 359 (made from TARGET_SYSTEM_ROOT), -isystem (made from COMPILER_PATH 360 and -B options) and -imultilib as necessary. 361 %s current argument is the name of a library or startup file of some sort. 362 Search for that file in a standard list of directories 363 and substitute the full name found. 364 %eSTR Print STR as an error message. STR is terminated by a newline. 365 Use this when inconsistent options are detected. 366 %nSTR Print STR as a notice. STR is terminated by a newline. 367 %x{OPTION} Accumulate an option for %X. 368 %X Output the accumulated linker options specified by compilations. 369 %Y Output the accumulated assembler options specified by compilations. 370 %Z Output the accumulated preprocessor options specified by compilations. 371 %a process ASM_SPEC as a spec. 372 This allows config.h to specify part of the spec for running as. 373 %A process ASM_FINAL_SPEC as a spec. A capital A is actually 374 used here. This can be used to run a post-processor after the 375 assembler has done its job. 376 %D Dump out a -L option for each directory in startfile_prefixes. 377 If multilib_dir is set, extra entries are generated with it affixed. 378 %l process LINK_SPEC as a spec. 379 %L process LIB_SPEC as a spec. 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, -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 #endif 484 485 /* config.h can define CPP_SPEC to provide extra args to the C preprocessor 486 or extra switch-translations. */ 487 #ifndef CPP_SPEC 488 #define CPP_SPEC "" 489 #endif 490 491 /* config.h can define CC1_SPEC to provide extra args to cc1 and cc1plus 492 or extra switch-translations. */ 493 #ifndef CC1_SPEC 494 #define CC1_SPEC "" 495 #endif 496 497 /* config.h can define CC1PLUS_SPEC to provide extra args to cc1plus 498 or extra switch-translations. */ 499 #ifndef CC1PLUS_SPEC 500 #define CC1PLUS_SPEC "" 501 #endif 502 503 /* config.h can define LINK_SPEC to provide extra args to the linker 504 or extra switch-translations. */ 505 #ifndef LINK_SPEC 506 #define LINK_SPEC "" 507 #endif 508 509 /* config.h can define LIB_SPEC to override the default libraries. */ 510 #ifndef LIB_SPEC 511 #define LIB_SPEC "%{!shared:%{g*:-lg} %{!p:%{!pg:-lc}}%{p:-lc_p}%{pg:-lc_p}}" 512 #endif 513 514 /* mudflap specs */ 515 #ifndef MFWRAP_SPEC 516 /* XXX: valid only for GNU ld */ 517 /* XXX: should exactly match hooks provided by libmudflap.a */ 518 #define MFWRAP_SPEC " %{static: %{fmudflap|fmudflapth: \ 519 --wrap=malloc --wrap=free --wrap=calloc --wrap=realloc\ 520 --wrap=mmap --wrap=mmap64 --wrap=munmap --wrap=alloca\ 521 } %{fmudflapth: --wrap=pthread_create\ 522 }} %{fmudflap|fmudflapth: --wrap=main}" 523 #endif 524 #ifndef MFLIB_SPEC 525 #define MFLIB_SPEC "%{fmudflap|fmudflapth: -export-dynamic}" 526 #endif 527 528 /* When using -fsplit-stack we need to wrap pthread_create, in order 529 to initialize the stack guard. We always use wrapping, rather than 530 shared library ordering, and we keep the wrapper function in 531 libgcc. This is not yet a real spec, though it could become one; 532 it is currently just stuffed into LINK_SPEC. FIXME: This wrapping 533 only works with GNU ld and gold. FIXME: This is incompatible with 534 -fmudflap when linking statically, which wants to do its own 535 wrapping. */ 536 #define STACK_SPLIT_SPEC " %{fsplit-stack: --wrap=pthread_create}" 537 538 /* config.h can define LIBGCC_SPEC to override how and when libgcc.a is 539 included. */ 540 #ifndef LIBGCC_SPEC 541 #if defined(REAL_LIBGCC_SPEC) 542 #define LIBGCC_SPEC REAL_LIBGCC_SPEC 543 #elif defined(LINK_LIBGCC_SPECIAL_1) 544 /* Have gcc do the search for libgcc.a. */ 545 #define LIBGCC_SPEC "libgcc.a%s" 546 #else 547 #define LIBGCC_SPEC "-lgcc" 548 #endif 549 #endif 550 551 /* config.h can define STARTFILE_SPEC to override the default crt0 files. */ 552 #ifndef STARTFILE_SPEC 553 #define STARTFILE_SPEC \ 554 "%{!shared:%{pg:gcrt0%O%s}%{!pg:%{p:mcrt0%O%s}%{!p:crt0%O%s}}}" 555 #endif 556 557 /* config.h can define ENDFILE_SPEC to override the default crtn files. */ 558 #ifndef ENDFILE_SPEC 559 #define ENDFILE_SPEC "" 560 #endif 561 562 #ifndef LINKER_NAME 563 #define LINKER_NAME "collect2" 564 #endif 565 566 #ifdef HAVE_AS_DEBUG_PREFIX_MAP 567 #define ASM_MAP " %{fdebug-prefix-map=*:--debug-prefix-map %*}" 568 #else 569 #define ASM_MAP "" 570 #endif 571 572 /* Define ASM_DEBUG_SPEC to be a spec suitable for translating '-g' 573 to the assembler. */ 574 #ifndef ASM_DEBUG_SPEC 575 # if defined(DBX_DEBUGGING_INFO) && defined(DWARF2_DEBUGGING_INFO) \ 576 && defined(HAVE_AS_GDWARF2_DEBUG_FLAG) && defined(HAVE_AS_GSTABS_DEBUG_FLAG) 577 # define ASM_DEBUG_SPEC \ 578 (PREFERRED_DEBUGGING_TYPE == DBX_DEBUG \ 579 ? "%{!g0:%{gdwarf-2*:--gdwarf2}%{!gdwarf-2*:%{g*:--gstabs}}}" ASM_MAP \ 580 : "%{!g0:%{gstabs*:--gstabs}%{!gstabs*:%{g*:--gdwarf2}}}" ASM_MAP) 581 # else 582 # if defined(DBX_DEBUGGING_INFO) && defined(HAVE_AS_GSTABS_DEBUG_FLAG) 583 # define ASM_DEBUG_SPEC "%{g*:%{!g0:--gstabs}}" ASM_MAP 584 # endif 585 # if defined(DWARF2_DEBUGGING_INFO) && defined(HAVE_AS_GDWARF2_DEBUG_FLAG) 586 # define ASM_DEBUG_SPEC "%{g*:%{!g0:--gdwarf2}}" ASM_MAP 587 # endif 588 # endif 589 #endif 590 #ifndef ASM_DEBUG_SPEC 591 # define ASM_DEBUG_SPEC "" 592 #endif 593 594 /* Here is the spec for running the linker, after compiling all files. */ 595 596 /* This is overridable by the target in case they need to specify the 597 -lgcc and -lc order specially, yet not require them to override all 598 of LINK_COMMAND_SPEC. */ 599 #ifndef LINK_GCC_C_SEQUENCE_SPEC 600 #define LINK_GCC_C_SEQUENCE_SPEC "%G %L %G" 601 #endif 602 603 #ifndef LINK_SSP_SPEC 604 #ifdef TARGET_LIBC_PROVIDES_SSP 605 #define LINK_SSP_SPEC "%{fstack-protector:}" 606 #else 607 #define LINK_SSP_SPEC "%{fstack-protector|fstack-protector-all:-lssp_nonshared -lssp}" 608 #endif 609 #endif 610 611 #ifndef LINK_PIE_SPEC 612 #ifdef HAVE_LD_PIE 613 #define LINK_PIE_SPEC "%{pie:-pie} " 614 #else 615 #define LINK_PIE_SPEC "%{pie:} " 616 #endif 617 #endif 618 619 #ifndef LINK_BUILDID_SPEC 620 # if defined(HAVE_LD_BUILDID) && defined(ENABLE_LD_BUILDID) 621 # define LINK_BUILDID_SPEC "%{!r:--build-id} " 622 # endif 623 #endif 624 625 /* Conditional to test whether the LTO plugin is used or not. 626 FIXME: For slim LTO we will need to enable plugin unconditionally. This 627 still cause problems with PLUGIN_LD != LD and when plugin is built but 628 not useable. For GCC 4.6 we don't support slim LTO and thus we can enable 629 plugin only when LTO is enabled. We still honor explicit 630 -fuse-linker-plugin if the linker used understands -plugin. */ 631 632 /* The linker has some plugin support. */ 633 #if HAVE_LTO_PLUGIN > 0 634 /* The linker used has full plugin support, use LTO plugin by default. */ 635 #if HAVE_LTO_PLUGIN == 2 636 #define PLUGIN_COND "!fno-use-linker-plugin:%{flto|flto=*|fuse-linker-plugin" 637 #define PLUGIN_COND_CLOSE "}" 638 #else 639 /* The linker used has limited plugin support, use LTO plugin with explicit 640 -fuse-linker-plugin. */ 641 #define PLUGIN_COND "fuse-linker-plugin" 642 #define PLUGIN_COND_CLOSE "" 643 #endif 644 #define LINK_PLUGIN_SPEC \ 645 "%{"PLUGIN_COND": \ 646 -plugin %(linker_plugin_file) \ 647 -plugin-opt=%(lto_wrapper) \ 648 -plugin-opt=-fresolution=%u.res \ 649 %{!nostdlib:%{!nodefaultlibs:%:pass-through-libs(%(link_gcc_c_sequence))}} \ 650 }"PLUGIN_COND_CLOSE 651 #else 652 /* The linker used doesn't support -plugin, reject -fuse-linker-plugin. */ 653 #define LINK_PLUGIN_SPEC "%{fuse-linker-plugin:\ 654 %e-fuse-linker-plugin is not supported in this configuration}" 655 #endif 656 657 658 /* -u* was put back because both BSD and SysV seem to support it. */ 659 /* %{static:} simply prevents an error message if the target machine 660 doesn't handle -static. */ 661 /* We want %{T*} after %{L*} and %D so that it can be used to specify linker 662 scripts which exist in user specified directories, or in standard 663 directories. */ 664 /* We pass any -flto flags on to the linker, which is expected 665 to understand them. In practice, this means it had better be collect2. */ 666 /* %{e*} includes -export-dynamic; see comment in common.opt. */ 667 #ifndef LINK_COMMAND_SPEC 668 #define LINK_COMMAND_SPEC "\ 669 %{!fsyntax-only:%{!c:%{!M:%{!MM:%{!E:%{!S:\ 670 %(linker) " \ 671 LINK_PLUGIN_SPEC \ 672 "%{flto|flto=*:%<fcompare-debug*} \ 673 %{flto} %{flto=*} %l " LINK_PIE_SPEC \ 674 "%X %{o*} %{e*} %{N} %{n} %{r}\ 675 %{s} %{t} %{u*} %{z} %{Z} %{!nostdlib:%{!nostartfiles:%S}}\ 676 %{static:} %{L*} %(mfwrap) %(link_libgcc) %o\ 677 %{fopenmp|ftree-parallelize-loops=*:%:include(libgomp.spec)%(link_gomp)}\ 678 %{fgnu-tm:%:include(libitm.spec)%(link_itm)}\ 679 %(mflib) " STACK_SPLIT_SPEC "\ 680 %{fprofile-arcs|fprofile-generate*|coverage:-lgcov}\ 681 %{!nostdlib:%{!nodefaultlibs:%(link_ssp) %(link_gcc_c_sequence)}}\ 682 %{!nostdlib:%{!nostartfiles:%E}} %{T*} }}}}}}" 683 #endif 684 685 #ifndef LINK_LIBGCC_SPEC 686 /* Generate -L options for startfile prefix list. */ 687 # define LINK_LIBGCC_SPEC "%D" 688 #endif 689 690 #ifndef STARTFILE_PREFIX_SPEC 691 # define STARTFILE_PREFIX_SPEC "" 692 #endif 693 694 #ifndef SYSROOT_SPEC 695 # define SYSROOT_SPEC "--sysroot=%R" 696 #endif 697 698 #ifndef SYSROOT_SUFFIX_SPEC 699 # define SYSROOT_SUFFIX_SPEC "" 700 #endif 701 702 #ifndef SYSROOT_HEADERS_SUFFIX_SPEC 703 # define SYSROOT_HEADERS_SUFFIX_SPEC "" 704 #endif 705 706 static const char *asm_debug; 707 static const char *cpp_spec = CPP_SPEC; 708 static const char *cc1_spec = CC1_SPEC; 709 static const char *cc1plus_spec = CC1PLUS_SPEC; 710 static const char *link_gcc_c_sequence_spec = LINK_GCC_C_SEQUENCE_SPEC; 711 static const char *link_ssp_spec = LINK_SSP_SPEC; 712 static const char *asm_spec = ASM_SPEC; 713 static const char *asm_final_spec = ASM_FINAL_SPEC; 714 static const char *link_spec = LINK_SPEC; 715 static const char *lib_spec = LIB_SPEC; 716 static const char *mfwrap_spec = MFWRAP_SPEC; 717 static const char *mflib_spec = MFLIB_SPEC; 718 static const char *link_gomp_spec = ""; 719 static const char *libgcc_spec = LIBGCC_SPEC; 720 static const char *endfile_spec = ENDFILE_SPEC; 721 static const char *startfile_spec = STARTFILE_SPEC; 722 static const char *linker_name_spec = LINKER_NAME; 723 static const char *linker_plugin_file_spec = ""; 724 static const char *lto_wrapper_spec = ""; 725 static const char *lto_gcc_spec = ""; 726 static const char *link_command_spec = LINK_COMMAND_SPEC; 727 static const char *link_libgcc_spec = LINK_LIBGCC_SPEC; 728 static const char *startfile_prefix_spec = STARTFILE_PREFIX_SPEC; 729 static const char *sysroot_spec = SYSROOT_SPEC; 730 static const char *sysroot_suffix_spec = SYSROOT_SUFFIX_SPEC; 731 static const char *sysroot_hdrs_suffix_spec = SYSROOT_HEADERS_SUFFIX_SPEC; 732 static const char *self_spec = ""; 733 734 /* Standard options to cpp, cc1, and as, to reduce duplication in specs. 735 There should be no need to override these in target dependent files, 736 but we need to copy them to the specs file so that newer versions 737 of the GCC driver can correctly drive older tool chains with the 738 appropriate -B options. */ 739 740 /* When cpplib handles traditional preprocessing, get rid of this, and 741 call cc1 (or cc1obj in objc/lang-specs.h) from the main specs so 742 that we default the front end language better. */ 743 static const char *trad_capable_cpp = 744 "cc1 -E %{traditional|traditional-cpp:-traditional-cpp}"; 745 746 /* We don't wrap .d files in %W{} since a missing .d file, and 747 therefore no dependency entry, confuses make into thinking a .o 748 file that happens to exist is up-to-date. */ 749 static const char *cpp_unique_options = 750 "%{!Q:-quiet} %{nostdinc*} %{C} %{CC} %{v} %{I*&F*} %{P} %I\ 751 %{MD:-MD %{!o:%b.d}%{o*:%.d%*}}\ 752 %{MMD:-MMD %{!o:%b.d}%{o*:%.d%*}}\ 753 %{M} %{MM} %{MF*} %{MG} %{MP} %{MQ*} %{MT*}\ 754 %{!E:%{!M:%{!MM:%{!MT:%{!MQ:%{MD|MMD:%{o*:-MQ %*}}}}}}}\ 755 %{remap} %{g3|ggdb3|gstabs3|gcoff3|gxcoff3|gvms3:-dD}\ 756 %{!iplugindir*:%{fplugin*:%:find-plugindir()}}\ 757 %{H} %C %{D*&U*&A*} %{i*} %Z %i\ 758 %{fmudflap:-D_MUDFLAP -include mf-runtime.h}\ 759 %{fmudflapth:-D_MUDFLAP -D_MUDFLAPTH -include mf-runtime.h}\ 760 %{E|M|MM:%W{o*}}"; 761 762 /* This contains cpp options which are common with cc1_options and are passed 763 only when preprocessing only to avoid duplication. We pass the cc1 spec 764 options to the preprocessor so that it the cc1 spec may manipulate 765 options used to set target flags. Those special target flags settings may 766 in turn cause preprocessor symbols to be defined specially. */ 767 static const char *cpp_options = 768 "%(cpp_unique_options) %1 %{m*} %{std*&ansi&trigraphs} %{W*&pedantic*} %{w}\ 769 %{f*} %{g*:%{!g0:%{g*} %{!fno-working-directory:-fworking-directory}}} %{O*}\ 770 %{undef} %{save-temps*:-fpch-preprocess}"; 771 772 /* This contains cpp options which are not passed when the preprocessor 773 output will be used by another program. */ 774 static const char *cpp_debug_options = "%{d*}"; 775 776 /* NB: This is shared amongst all front-ends, except for Ada. */ 777 static const char *cc1_options = 778 "%{pg:%{fomit-frame-pointer:%e-pg and -fomit-frame-pointer are incompatible}}\ 779 %{!iplugindir*:%{fplugin*:%:find-plugindir()}}\ 780 %1 %{!Q:-quiet} %{!dumpbase:-dumpbase %B} %{d*} %{m*} %{aux-info*}\ 781 %{fcompare-debug-second:%:compare-debug-auxbase-opt(%b)} \ 782 %{!fcompare-debug-second:%{c|S:%{o*:-auxbase-strip %*}%{!o*:-auxbase %b}}}%{!c:%{!S:-auxbase %b}} \ 783 %{g*} %{O*} %{W*&pedantic*} %{w} %{std*&ansi&trigraphs}\ 784 %{v:-version} %{pg:-p} %{p} %{f*} %{undef}\ 785 %{Qn:-fno-ident} %{Qy:} %{-help:--help}\ 786 %{-target-help:--target-help}\ 787 %{-version:--version}\ 788 %{-help=*:--help=%*}\ 789 %{!fsyntax-only:%{S:%W{o*}%{!o*:-o %b.s}}}\ 790 %{fsyntax-only:-o %j} %{-param*}\ 791 %{fmudflap|fmudflapth:-fno-builtin -fno-merge-constants}\ 792 %{coverage:-fprofile-arcs -ftest-coverage}"; 793 794 static const char *asm_options = 795 "%{-target-help:%:print-asm-header()} " 796 #if HAVE_GNU_AS 797 /* If GNU AS is used, then convert -w (no warnings), -I, and -v 798 to the assembler equivalents. */ 799 "%{v} %{w:-W} %{I*} " 800 #endif 801 "%a %Y %{c:%W{o*}%{!o*:-o %w%b%O}}%{!c:-o %d%w%u%O}"; 802 803 static const char *invoke_as = 804 #ifdef AS_NEEDS_DASH_FOR_PIPED_INPUT 805 "%{!fwpa:\ 806 %{fcompare-debug=*|fdump-final-insns=*:%:compare-debug-dump-opt()}\ 807 %{!S:-o %|.s |\n as %(asm_options) %|.s %A }\ 808 }"; 809 #else 810 "%{!fwpa:\ 811 %{fcompare-debug=*|fdump-final-insns=*:%:compare-debug-dump-opt()}\ 812 %{!S:-o %|.s |\n as %(asm_options) %m.s %A }\ 813 }"; 814 #endif 815 816 /* Some compilers have limits on line lengths, and the multilib_select 817 and/or multilib_matches strings can be very long, so we build them at 818 run time. */ 819 static struct obstack multilib_obstack; 820 static const char *multilib_select; 821 static const char *multilib_matches; 822 static const char *multilib_defaults; 823 static const char *multilib_exclusions; 824 825 /* Check whether a particular argument is a default argument. */ 826 827 #ifndef MULTILIB_DEFAULTS 828 #define MULTILIB_DEFAULTS { "" } 829 #endif 830 831 static const char *const multilib_defaults_raw[] = MULTILIB_DEFAULTS; 832 833 #ifndef DRIVER_SELF_SPECS 834 #define DRIVER_SELF_SPECS "" 835 #endif 836 837 /* Adding -fopenmp should imply pthreads. This is particularly important 838 for targets that use different start files and suchlike. */ 839 #ifndef GOMP_SELF_SPECS 840 #define GOMP_SELF_SPECS "%{fopenmp|ftree-parallelize-loops=*: -pthread}" 841 #endif 842 843 /* Likewise for -fgnu-tm. */ 844 #ifndef GTM_SELF_SPECS 845 #define GTM_SELF_SPECS "%{fgnu-tm: -pthread}" 846 #endif 847 848 static const char *const driver_self_specs[] = { 849 "%{fdump-final-insns:-fdump-final-insns=.} %<fdump-final-insns", 850 DRIVER_SELF_SPECS, CONFIGURE_SPECS, GOMP_SELF_SPECS, GTM_SELF_SPECS 851 }; 852 853 #ifndef OPTION_DEFAULT_SPECS 854 #define OPTION_DEFAULT_SPECS { "", "" } 855 #endif 856 857 struct default_spec 858 { 859 const char *name; 860 const char *spec; 861 }; 862 863 static const struct default_spec 864 option_default_specs[] = { OPTION_DEFAULT_SPECS }; 865 866 struct user_specs 867 { 868 struct user_specs *next; 869 const char *filename; 870 }; 871 872 static struct user_specs *user_specs_head, *user_specs_tail; 873 874 875 /* Record the mapping from file suffixes for compilation specs. */ 876 877 struct compiler 878 { 879 const char *suffix; /* Use this compiler for input files 880 whose names end in this suffix. */ 881 882 const char *spec; /* To use this compiler, run this spec. */ 883 884 const char *cpp_spec; /* If non-NULL, substitute this spec 885 for `%C', rather than the usual 886 cpp_spec. */ 887 const int combinable; /* If nonzero, compiler can deal with 888 multiple source files at once (IMA). */ 889 const int needs_preprocessing; /* If nonzero, source files need to 890 be run through a preprocessor. */ 891 }; 892 893 /* Pointer to a vector of `struct compiler' that gives the spec for 894 compiling a file, based on its suffix. 895 A file that does not end in any of these suffixes will be passed 896 unchanged to the loader and nothing else will be done to it. 897 898 An entry containing two 0s is used to terminate the vector. 899 900 If multiple entries match a file, the last matching one is used. */ 901 902 static struct compiler *compilers; 903 904 /* Number of entries in `compilers', not counting the null terminator. */ 905 906 static int n_compilers; 907 908 /* The default list of file name suffixes and their compilation specs. */ 909 910 static const struct compiler default_compilers[] = 911 { 912 /* Add lists of suffixes of known languages here. If those languages 913 were not present when we built the driver, we will hit these copies 914 and be given a more meaningful error than "file not used since 915 linking is not done". */ 916 {".m", "#Objective-C", 0, 0, 0}, {".mi", "#Objective-C", 0, 0, 0}, 917 {".mm", "#Objective-C++", 0, 0, 0}, {".M", "#Objective-C++", 0, 0, 0}, 918 {".mii", "#Objective-C++", 0, 0, 0}, 919 {".cc", "#C++", 0, 0, 0}, {".cxx", "#C++", 0, 0, 0}, 920 {".cpp", "#C++", 0, 0, 0}, {".cp", "#C++", 0, 0, 0}, 921 {".c++", "#C++", 0, 0, 0}, {".C", "#C++", 0, 0, 0}, 922 {".CPP", "#C++", 0, 0, 0}, {".ii", "#C++", 0, 0, 0}, 923 {".ads", "#Ada", 0, 0, 0}, {".adb", "#Ada", 0, 0, 0}, 924 {".f", "#Fortran", 0, 0, 0}, {".F", "#Fortran", 0, 0, 0}, 925 {".for", "#Fortran", 0, 0, 0}, {".FOR", "#Fortran", 0, 0, 0}, 926 {".ftn", "#Fortran", 0, 0, 0}, {".FTN", "#Fortran", 0, 0, 0}, 927 {".fpp", "#Fortran", 0, 0, 0}, {".FPP", "#Fortran", 0, 0, 0}, 928 {".f90", "#Fortran", 0, 0, 0}, {".F90", "#Fortran", 0, 0, 0}, 929 {".f95", "#Fortran", 0, 0, 0}, {".F95", "#Fortran", 0, 0, 0}, 930 {".f03", "#Fortran", 0, 0, 0}, {".F03", "#Fortran", 0, 0, 0}, 931 {".f08", "#Fortran", 0, 0, 0}, {".F08", "#Fortran", 0, 0, 0}, 932 {".r", "#Ratfor", 0, 0, 0}, 933 {".p", "#Pascal", 0, 0, 0}, {".pas", "#Pascal", 0, 0, 0}, 934 {".java", "#Java", 0, 0, 0}, {".class", "#Java", 0, 0, 0}, 935 {".zip", "#Java", 0, 0, 0}, {".jar", "#Java", 0, 0, 0}, 936 {".go", "#Go", 0, 1, 0}, 937 /* Next come the entries for C. */ 938 {".c", "@c", 0, 0, 1}, 939 {"@c", 940 /* cc1 has an integrated ISO C preprocessor. We should invoke the 941 external preprocessor if -save-temps is given. */ 942 "%{E|M|MM:%(trad_capable_cpp) %(cpp_options) %(cpp_debug_options)}\ 943 %{!E:%{!M:%{!MM:\ 944 %{traditional:\ 945 %eGNU C no longer supports -traditional without -E}\ 946 %{save-temps*|traditional-cpp|no-integrated-cpp:%(trad_capable_cpp) \ 947 %(cpp_options) -o %{save-temps*:%b.i} %{!save-temps*:%g.i} \n\ 948 cc1 -fpreprocessed %{save-temps*:%b.i} %{!save-temps*:%g.i} \ 949 %(cc1_options)}\ 950 %{!save-temps*:%{!traditional-cpp:%{!no-integrated-cpp:\ 951 cc1 %(cpp_unique_options) %(cc1_options)}}}\ 952 %{!fsyntax-only:%(invoke_as)}}}}", 0, 0, 1}, 953 {"-", 954 "%{!E:%e-E or -x required when input is from standard input}\ 955 %(trad_capable_cpp) %(cpp_options) %(cpp_debug_options)", 0, 0, 0}, 956 {".h", "@c-header", 0, 0, 0}, 957 {"@c-header", 958 /* cc1 has an integrated ISO C preprocessor. We should invoke the 959 external preprocessor if -save-temps is given. */ 960 "%{E|M|MM:%(trad_capable_cpp) %(cpp_options) %(cpp_debug_options)}\ 961 %{!E:%{!M:%{!MM:\ 962 %{save-temps*|traditional-cpp|no-integrated-cpp:%(trad_capable_cpp) \ 963 %(cpp_options) -o %{save-temps*:%b.i} %{!save-temps*:%g.i} \n\ 964 cc1 -fpreprocessed %{save-temps*:%b.i} %{!save-temps*:%g.i} \ 965 %(cc1_options)\ 966 %{!fdump-ada-spec*:-o %g.s %{!o*:--output-pch=%i.gch}\ 967 %W{o*:--output-pch=%*}}%V}\ 968 %{!save-temps*:%{!traditional-cpp:%{!no-integrated-cpp:\ 969 cc1 %(cpp_unique_options) %(cc1_options)\ 970 %{!fdump-ada-spec*:-o %g.s %{!o*:--output-pch=%i.gch}\ 971 %W{o*:--output-pch=%*}}%V}}}}}}", 0, 0, 0}, 972 {".i", "@cpp-output", 0, 0, 0}, 973 {"@cpp-output", 974 "%{!M:%{!MM:%{!E:cc1 -fpreprocessed %i %(cc1_options) %{!fsyntax-only:%(invoke_as)}}}}", 0, 0, 0}, 975 {".s", "@assembler", 0, 0, 0}, 976 {"@assembler", 977 "%{!M:%{!MM:%{!E:%{!S:as %(asm_debug) %(asm_options) %i %A }}}}", 0, 0, 0}, 978 {".sx", "@assembler-with-cpp", 0, 0, 0}, 979 {".S", "@assembler-with-cpp", 0, 0, 0}, 980 {"@assembler-with-cpp", 981 #ifdef AS_NEEDS_DASH_FOR_PIPED_INPUT 982 "%(trad_capable_cpp) -lang-asm %(cpp_options) -fno-directives-only\ 983 %{E|M|MM:%(cpp_debug_options)}\ 984 %{!M:%{!MM:%{!E:%{!S:-o %|.s |\n\ 985 as %(asm_debug) %(asm_options) %|.s %A }}}}" 986 #else 987 "%(trad_capable_cpp) -lang-asm %(cpp_options) -fno-directives-only\ 988 %{E|M|MM:%(cpp_debug_options)}\ 989 %{!M:%{!MM:%{!E:%{!S:-o %|.s |\n\ 990 as %(asm_debug) %(asm_options) %m.s %A }}}}" 991 #endif 992 , 0, 0, 0}, 993 994 #include "specs.h" 995 /* Mark end of table. */ 996 {0, 0, 0, 0, 0} 997 }; 998 999 /* Number of elements in default_compilers, not counting the terminator. */ 1000 1001 static const int n_default_compilers = ARRAY_SIZE (default_compilers) - 1; 1002 1003 typedef char *char_p; /* For DEF_VEC_P. */ 1004 DEF_VEC_P(char_p); 1005 DEF_VEC_ALLOC_P(char_p,heap); 1006 1007 /* A vector of options to give to the linker. 1008 These options are accumulated by %x, 1009 and substituted into the linker command with %X. */ 1010 static VEC(char_p,heap) *linker_options; 1011 1012 /* A vector of options to give to the assembler. 1013 These options are accumulated by -Wa, 1014 and substituted into the assembler command with %Y. */ 1015 static VEC(char_p,heap) *assembler_options; 1016 1017 /* A vector of options to give to the preprocessor. 1018 These options are accumulated by -Wp, 1019 and substituted into the preprocessor command with %Z. */ 1020 static VEC(char_p,heap) *preprocessor_options; 1021 1022 static char * 1023 skip_whitespace (char *p) 1024 { 1025 while (1) 1026 { 1027 /* A fully-blank line is a delimiter in the SPEC file and shouldn't 1028 be considered whitespace. */ 1029 if (p[0] == '\n' && p[1] == '\n' && p[2] == '\n') 1030 return p + 1; 1031 else if (*p == '\n' || *p == ' ' || *p == '\t') 1032 p++; 1033 else if (*p == '#') 1034 { 1035 while (*p != '\n') 1036 p++; 1037 p++; 1038 } 1039 else 1040 break; 1041 } 1042 1043 return p; 1044 } 1045 /* Structures to keep track of prefixes to try when looking for files. */ 1046 1047 struct prefix_list 1048 { 1049 const char *prefix; /* String to prepend to the path. */ 1050 struct prefix_list *next; /* Next in linked list. */ 1051 int require_machine_suffix; /* Don't use without machine_suffix. */ 1052 /* 2 means try both machine_suffix and just_machine_suffix. */ 1053 int priority; /* Sort key - priority within list. */ 1054 int os_multilib; /* 1 if OS multilib scheme should be used, 1055 0 for GCC multilib scheme. */ 1056 }; 1057 1058 struct path_prefix 1059 { 1060 struct prefix_list *plist; /* List of prefixes to try */ 1061 int max_len; /* Max length of a prefix in PLIST */ 1062 const char *name; /* Name of this list (used in config stuff) */ 1063 }; 1064 1065 /* List of prefixes to try when looking for executables. */ 1066 1067 static struct path_prefix exec_prefixes = { 0, 0, "exec" }; 1068 1069 /* List of prefixes to try when looking for startup (crt0) files. */ 1070 1071 static struct path_prefix startfile_prefixes = { 0, 0, "startfile" }; 1072 1073 /* List of prefixes to try when looking for include files. */ 1074 1075 static struct path_prefix include_prefixes = { 0, 0, "include" }; 1076 1077 /* Suffix to attach to directories searched for commands. 1078 This looks like `MACHINE/VERSION/'. */ 1079 1080 static const char *machine_suffix = 0; 1081 1082 /* Suffix to attach to directories searched for commands. 1083 This is just `MACHINE/'. */ 1084 1085 static const char *just_machine_suffix = 0; 1086 1087 /* Adjusted value of GCC_EXEC_PREFIX envvar. */ 1088 1089 static const char *gcc_exec_prefix; 1090 1091 /* Adjusted value of standard_libexec_prefix. */ 1092 1093 static const char *gcc_libexec_prefix; 1094 1095 /* Default prefixes to attach to command names. */ 1096 1097 #ifndef STANDARD_STARTFILE_PREFIX_1 1098 #define STANDARD_STARTFILE_PREFIX_1 "/lib/" 1099 #endif 1100 #ifndef STANDARD_STARTFILE_PREFIX_2 1101 #define STANDARD_STARTFILE_PREFIX_2 "/usr/lib/" 1102 #endif 1103 1104 #ifdef CROSS_DIRECTORY_STRUCTURE /* Don't use these prefixes for a cross compiler. */ 1105 #undef MD_EXEC_PREFIX 1106 #undef MD_STARTFILE_PREFIX 1107 #undef MD_STARTFILE_PREFIX_1 1108 #endif 1109 1110 /* If no prefixes defined, use the null string, which will disable them. */ 1111 #ifndef MD_EXEC_PREFIX 1112 #define MD_EXEC_PREFIX "" 1113 #endif 1114 #ifndef MD_STARTFILE_PREFIX 1115 #define MD_STARTFILE_PREFIX "" 1116 #endif 1117 #ifndef MD_STARTFILE_PREFIX_1 1118 #define MD_STARTFILE_PREFIX_1 "" 1119 #endif 1120 1121 /* These directories are locations set at configure-time based on the 1122 --prefix option provided to configure. Their initializers are 1123 defined in Makefile.in. These paths are not *directly* used when 1124 gcc_exec_prefix is set because, in that case, we know where the 1125 compiler has been installed, and use paths relative to that 1126 location instead. */ 1127 static const char *const standard_exec_prefix = STANDARD_EXEC_PREFIX; 1128 static const char *const standard_libexec_prefix = STANDARD_LIBEXEC_PREFIX; 1129 static const char *const standard_bindir_prefix = STANDARD_BINDIR_PREFIX; 1130 static const char *const standard_startfile_prefix = STANDARD_STARTFILE_PREFIX; 1131 1132 /* For native compilers, these are well-known paths containing 1133 components that may be provided by the system. For cross 1134 compilers, these paths are not used. */ 1135 static const char *md_exec_prefix = MD_EXEC_PREFIX; 1136 static const char *md_startfile_prefix = MD_STARTFILE_PREFIX; 1137 static const char *md_startfile_prefix_1 = MD_STARTFILE_PREFIX_1; 1138 static const char *const standard_startfile_prefix_1 1139 = STANDARD_STARTFILE_PREFIX_1; 1140 static const char *const standard_startfile_prefix_2 1141 = STANDARD_STARTFILE_PREFIX_2; 1142 1143 /* A relative path to be used in finding the location of tools 1144 relative to the driver. */ 1145 static const char *const tooldir_base_prefix = TOOLDIR_BASE_PREFIX; 1146 1147 /* Subdirectory to use for locating libraries. Set by 1148 set_multilib_dir based on the compilation options. */ 1149 1150 static const char *multilib_dir; 1151 1152 /* Subdirectory to use for locating libraries in OS conventions. Set by 1153 set_multilib_dir based on the compilation options. */ 1154 1155 static const char *multilib_os_dir; 1156 1157 /* Structure to keep track of the specs that have been defined so far. 1158 These are accessed using %(specname) in a compiler or link 1159 spec. */ 1160 1161 struct spec_list 1162 { 1163 /* The following 2 fields must be first */ 1164 /* to allow EXTRA_SPECS to be initialized */ 1165 const char *name; /* name of the spec. */ 1166 const char *ptr; /* available ptr if no static pointer */ 1167 1168 /* The following fields are not initialized */ 1169 /* by EXTRA_SPECS */ 1170 const char **ptr_spec; /* pointer to the spec itself. */ 1171 struct spec_list *next; /* Next spec in linked list. */ 1172 int name_len; /* length of the name */ 1173 int alloc_p; /* whether string was allocated */ 1174 }; 1175 1176 #define INIT_STATIC_SPEC(NAME,PTR) \ 1177 { NAME, NULL, PTR, (struct spec_list *) 0, sizeof (NAME) - 1, 0 } 1178 1179 /* List of statically defined specs. */ 1180 static struct spec_list static_specs[] = 1181 { 1182 INIT_STATIC_SPEC ("asm", &asm_spec), 1183 INIT_STATIC_SPEC ("asm_debug", &asm_debug), 1184 INIT_STATIC_SPEC ("asm_final", &asm_final_spec), 1185 INIT_STATIC_SPEC ("asm_options", &asm_options), 1186 INIT_STATIC_SPEC ("invoke_as", &invoke_as), 1187 INIT_STATIC_SPEC ("cpp", &cpp_spec), 1188 INIT_STATIC_SPEC ("cpp_options", &cpp_options), 1189 INIT_STATIC_SPEC ("cpp_debug_options", &cpp_debug_options), 1190 INIT_STATIC_SPEC ("cpp_unique_options", &cpp_unique_options), 1191 INIT_STATIC_SPEC ("trad_capable_cpp", &trad_capable_cpp), 1192 INIT_STATIC_SPEC ("cc1", &cc1_spec), 1193 INIT_STATIC_SPEC ("cc1_options", &cc1_options), 1194 INIT_STATIC_SPEC ("cc1plus", &cc1plus_spec), 1195 INIT_STATIC_SPEC ("link_gcc_c_sequence", &link_gcc_c_sequence_spec), 1196 INIT_STATIC_SPEC ("link_ssp", &link_ssp_spec), 1197 INIT_STATIC_SPEC ("endfile", &endfile_spec), 1198 INIT_STATIC_SPEC ("link", &link_spec), 1199 INIT_STATIC_SPEC ("lib", &lib_spec), 1200 INIT_STATIC_SPEC ("mfwrap", &mfwrap_spec), 1201 INIT_STATIC_SPEC ("mflib", &mflib_spec), 1202 INIT_STATIC_SPEC ("link_gomp", &link_gomp_spec), 1203 INIT_STATIC_SPEC ("libgcc", &libgcc_spec), 1204 INIT_STATIC_SPEC ("startfile", &startfile_spec), 1205 INIT_STATIC_SPEC ("cross_compile", &cross_compile), 1206 INIT_STATIC_SPEC ("version", &compiler_version), 1207 INIT_STATIC_SPEC ("multilib", &multilib_select), 1208 INIT_STATIC_SPEC ("multilib_defaults", &multilib_defaults), 1209 INIT_STATIC_SPEC ("multilib_extra", &multilib_extra), 1210 INIT_STATIC_SPEC ("multilib_matches", &multilib_matches), 1211 INIT_STATIC_SPEC ("multilib_exclusions", &multilib_exclusions), 1212 INIT_STATIC_SPEC ("multilib_options", &multilib_options), 1213 INIT_STATIC_SPEC ("linker", &linker_name_spec), 1214 INIT_STATIC_SPEC ("linker_plugin_file", &linker_plugin_file_spec), 1215 INIT_STATIC_SPEC ("lto_wrapper", <o_wrapper_spec), 1216 INIT_STATIC_SPEC ("lto_gcc", <o_gcc_spec), 1217 INIT_STATIC_SPEC ("link_libgcc", &link_libgcc_spec), 1218 INIT_STATIC_SPEC ("md_exec_prefix", &md_exec_prefix), 1219 INIT_STATIC_SPEC ("md_startfile_prefix", &md_startfile_prefix), 1220 INIT_STATIC_SPEC ("md_startfile_prefix_1", &md_startfile_prefix_1), 1221 INIT_STATIC_SPEC ("startfile_prefix_spec", &startfile_prefix_spec), 1222 INIT_STATIC_SPEC ("sysroot_spec", &sysroot_spec), 1223 INIT_STATIC_SPEC ("sysroot_suffix_spec", &sysroot_suffix_spec), 1224 INIT_STATIC_SPEC ("sysroot_hdrs_suffix_spec", &sysroot_hdrs_suffix_spec), 1225 INIT_STATIC_SPEC ("self_spec", &self_spec), 1226 }; 1227 1228 #ifdef EXTRA_SPECS /* additional specs needed */ 1229 /* Structure to keep track of just the first two args of a spec_list. 1230 That is all that the EXTRA_SPECS macro gives us. */ 1231 struct spec_list_1 1232 { 1233 const char *const name; 1234 const char *const ptr; 1235 }; 1236 1237 static const struct spec_list_1 extra_specs_1[] = { EXTRA_SPECS }; 1238 static struct spec_list *extra_specs = (struct spec_list *) 0; 1239 #endif 1240 1241 /* List of dynamically allocates specs that have been defined so far. */ 1242 1243 static struct spec_list *specs = (struct spec_list *) 0; 1244 1245 /* List of static spec functions. */ 1246 1247 static const struct spec_function static_spec_functions[] = 1248 { 1249 { "getenv", getenv_spec_function }, 1250 { "if-exists", if_exists_spec_function }, 1251 { "if-exists-else", if_exists_else_spec_function }, 1252 { "replace-outfile", replace_outfile_spec_function }, 1253 { "remove-outfile", remove_outfile_spec_function }, 1254 { "version-compare", version_compare_spec_function }, 1255 { "include", include_spec_function }, 1256 { "find-file", find_file_spec_function }, 1257 { "find-plugindir", find_plugindir_spec_function }, 1258 { "print-asm-header", print_asm_header_spec_function }, 1259 { "compare-debug-dump-opt", compare_debug_dump_opt_spec_function }, 1260 { "compare-debug-self-opt", compare_debug_self_opt_spec_function }, 1261 { "compare-debug-auxbase-opt", compare_debug_auxbase_opt_spec_function }, 1262 { "pass-through-libs", pass_through_libs_spec_func }, 1263 #ifdef EXTRA_SPEC_FUNCTIONS 1264 EXTRA_SPEC_FUNCTIONS 1265 #endif 1266 { 0, 0 } 1267 }; 1268 1269 static int processing_spec_function; 1270 1271 /* Add appropriate libgcc specs to OBSTACK, taking into account 1272 various permutations of -shared-libgcc, -shared, and such. */ 1273 1274 #if defined(ENABLE_SHARED_LIBGCC) && !defined(REAL_LIBGCC_SPEC) 1275 1276 #ifndef USE_LD_AS_NEEDED 1277 #define USE_LD_AS_NEEDED 0 1278 #endif 1279 1280 static void 1281 init_gcc_specs (struct obstack *obstack, const char *shared_name, 1282 const char *static_name, const char *eh_name) 1283 { 1284 char *buf; 1285 1286 buf = concat ("%{static|static-libgcc:", static_name, " ", eh_name, "}" 1287 "%{!static:%{!static-libgcc:" 1288 #if USE_LD_AS_NEEDED 1289 "%{!shared-libgcc:", 1290 static_name, " --as-needed ", shared_name, " --no-as-needed" 1291 "}" 1292 "%{shared-libgcc:", 1293 shared_name, "%{!shared: ", static_name, "}" 1294 "}" 1295 #else 1296 "%{!shared:" 1297 "%{!shared-libgcc:", static_name, " ", eh_name, "}" 1298 "%{shared-libgcc:", shared_name, " ", static_name, "}" 1299 "}" 1300 #ifdef LINK_EH_SPEC 1301 "%{shared:" 1302 "%{shared-libgcc:", shared_name, "}" 1303 "%{!shared-libgcc:", static_name, "}" 1304 "}" 1305 #else 1306 "%{shared:", shared_name, "}" 1307 #endif 1308 #endif 1309 "}}", NULL); 1310 1311 obstack_grow (obstack, buf, strlen (buf)); 1312 free (buf); 1313 } 1314 #endif /* ENABLE_SHARED_LIBGCC */ 1315 1316 /* Initialize the specs lookup routines. */ 1317 1318 static void 1319 init_spec (void) 1320 { 1321 struct spec_list *next = (struct spec_list *) 0; 1322 struct spec_list *sl = (struct spec_list *) 0; 1323 int i; 1324 1325 if (specs) 1326 return; /* Already initialized. */ 1327 1328 if (verbose_flag) 1329 fnotice (stderr, "Using built-in specs.\n"); 1330 1331 #ifdef EXTRA_SPECS 1332 extra_specs = XCNEWVEC (struct spec_list, ARRAY_SIZE (extra_specs_1)); 1333 1334 for (i = ARRAY_SIZE (extra_specs_1) - 1; i >= 0; i--) 1335 { 1336 sl = &extra_specs[i]; 1337 sl->name = extra_specs_1[i].name; 1338 sl->ptr = extra_specs_1[i].ptr; 1339 sl->next = next; 1340 sl->name_len = strlen (sl->name); 1341 sl->ptr_spec = &sl->ptr; 1342 next = sl; 1343 } 1344 #endif 1345 1346 for (i = ARRAY_SIZE (static_specs) - 1; i >= 0; i--) 1347 { 1348 sl = &static_specs[i]; 1349 sl->next = next; 1350 next = sl; 1351 } 1352 1353 #if defined(ENABLE_SHARED_LIBGCC) && !defined(REAL_LIBGCC_SPEC) 1354 /* ??? If neither -shared-libgcc nor --static-libgcc was 1355 seen, then we should be making an educated guess. Some proposed 1356 heuristics for ELF include: 1357 1358 (1) If "-Wl,--export-dynamic", then it's a fair bet that the 1359 program will be doing dynamic loading, which will likely 1360 need the shared libgcc. 1361 1362 (2) If "-ldl", then it's also a fair bet that we're doing 1363 dynamic loading. 1364 1365 (3) For each ET_DYN we're linking against (either through -lfoo 1366 or /some/path/foo.so), check to see whether it or one of 1367 its dependencies depends on a shared libgcc. 1368 1369 (4) If "-shared" 1370 1371 If the runtime is fixed to look for program headers instead 1372 of calling __register_frame_info at all, for each object, 1373 use the shared libgcc if any EH symbol referenced. 1374 1375 If crtstuff is fixed to not invoke __register_frame_info 1376 automatically, for each object, use the shared libgcc if 1377 any non-empty unwind section found. 1378 1379 Doing any of this probably requires invoking an external program to 1380 do the actual object file scanning. */ 1381 { 1382 const char *p = libgcc_spec; 1383 int in_sep = 1; 1384 1385 /* Transform the extant libgcc_spec into one that uses the shared libgcc 1386 when given the proper command line arguments. */ 1387 while (*p) 1388 { 1389 if (in_sep && *p == '-' && strncmp (p, "-lgcc", 5) == 0) 1390 { 1391 init_gcc_specs (&obstack, 1392 "-lgcc_s" 1393 #ifdef USE_LIBUNWIND_EXCEPTIONS 1394 " -lunwind" 1395 #endif 1396 , 1397 "-lgcc", 1398 "-lgcc_eh" 1399 #ifdef USE_LIBUNWIND_EXCEPTIONS 1400 # ifdef HAVE_LD_STATIC_DYNAMIC 1401 " %{!static:" LD_STATIC_OPTION "} -lunwind" 1402 " %{!static:" LD_DYNAMIC_OPTION "}" 1403 # else 1404 " -lunwind" 1405 # endif 1406 #endif 1407 ); 1408 1409 p += 5; 1410 in_sep = 0; 1411 } 1412 else if (in_sep && *p == 'l' && strncmp (p, "libgcc.a%s", 10) == 0) 1413 { 1414 /* Ug. We don't know shared library extensions. Hope that 1415 systems that use this form don't do shared libraries. */ 1416 init_gcc_specs (&obstack, 1417 "-lgcc_s", 1418 "libgcc.a%s", 1419 "libgcc_eh.a%s" 1420 #ifdef USE_LIBUNWIND_EXCEPTIONS 1421 " -lunwind" 1422 #endif 1423 ); 1424 p += 10; 1425 in_sep = 0; 1426 } 1427 else 1428 { 1429 obstack_1grow (&obstack, *p); 1430 in_sep = (*p == ' '); 1431 p += 1; 1432 } 1433 } 1434 1435 obstack_1grow (&obstack, '\0'); 1436 libgcc_spec = XOBFINISH (&obstack, const char *); 1437 } 1438 #endif 1439 #ifdef USE_AS_TRADITIONAL_FORMAT 1440 /* Prepend "--traditional-format" to whatever asm_spec we had before. */ 1441 { 1442 static const char tf[] = "--traditional-format "; 1443 obstack_grow (&obstack, tf, sizeof(tf) - 1); 1444 obstack_grow0 (&obstack, asm_spec, strlen (asm_spec)); 1445 asm_spec = XOBFINISH (&obstack, const char *); 1446 } 1447 #endif 1448 1449 #if defined LINK_EH_SPEC || defined LINK_BUILDID_SPEC || \ 1450 defined LINKER_HASH_STYLE 1451 # ifdef LINK_BUILDID_SPEC 1452 /* Prepend LINK_BUILDID_SPEC to whatever link_spec we had before. */ 1453 obstack_grow (&obstack, LINK_BUILDID_SPEC, sizeof(LINK_BUILDID_SPEC) - 1); 1454 # endif 1455 # ifdef LINK_EH_SPEC 1456 /* Prepend LINK_EH_SPEC to whatever link_spec we had before. */ 1457 obstack_grow (&obstack, LINK_EH_SPEC, sizeof(LINK_EH_SPEC) - 1); 1458 # endif 1459 # ifdef LINKER_HASH_STYLE 1460 /* Prepend --hash-style=LINKER_HASH_STYLE to whatever link_spec we had 1461 before. */ 1462 { 1463 static const char hash_style[] = "--hash-style="; 1464 obstack_grow (&obstack, hash_style, sizeof(hash_style) - 1); 1465 obstack_grow (&obstack, LINKER_HASH_STYLE, sizeof(LINKER_HASH_STYLE) - 1); 1466 obstack_1grow (&obstack, ' '); 1467 } 1468 # endif 1469 obstack_grow0 (&obstack, link_spec, strlen (link_spec)); 1470 link_spec = XOBFINISH (&obstack, const char *); 1471 #endif 1472 1473 specs = sl; 1474 } 1475 1476 /* Change the value of spec NAME to SPEC. If SPEC is empty, then the spec is 1477 removed; If the spec starts with a + then SPEC is added to the end of the 1478 current spec. */ 1479 1480 static void 1481 set_spec (const char *name, const char *spec) 1482 { 1483 struct spec_list *sl; 1484 const char *old_spec; 1485 int name_len = strlen (name); 1486 int i; 1487 1488 /* If this is the first call, initialize the statically allocated specs. */ 1489 if (!specs) 1490 { 1491 struct spec_list *next = (struct spec_list *) 0; 1492 for (i = ARRAY_SIZE (static_specs) - 1; i >= 0; i--) 1493 { 1494 sl = &static_specs[i]; 1495 sl->next = next; 1496 next = sl; 1497 } 1498 specs = sl; 1499 } 1500 1501 /* See if the spec already exists. */ 1502 for (sl = specs; sl; sl = sl->next) 1503 if (name_len == sl->name_len && !strcmp (sl->name, name)) 1504 break; 1505 1506 if (!sl) 1507 { 1508 /* Not found - make it. */ 1509 sl = XNEW (struct spec_list); 1510 sl->name = xstrdup (name); 1511 sl->name_len = name_len; 1512 sl->ptr_spec = &sl->ptr; 1513 sl->alloc_p = 0; 1514 *(sl->ptr_spec) = ""; 1515 sl->next = specs; 1516 specs = sl; 1517 } 1518 1519 old_spec = *(sl->ptr_spec); 1520 *(sl->ptr_spec) = ((spec[0] == '+' && ISSPACE ((unsigned char)spec[1])) 1521 ? concat (old_spec, spec + 1, NULL) 1522 : xstrdup (spec)); 1523 1524 #ifdef DEBUG_SPECS 1525 if (verbose_flag) 1526 fnotice (stderr, "Setting spec %s to '%s'\n\n", name, *(sl->ptr_spec)); 1527 #endif 1528 1529 /* Free the old spec. */ 1530 if (old_spec && sl->alloc_p) 1531 free (CONST_CAST(char *, old_spec)); 1532 1533 sl->alloc_p = 1; 1534 } 1535 1536 /* Accumulate a command (program name and args), and run it. */ 1537 1538 typedef const char *const_char_p; /* For DEF_VEC_P. */ 1539 DEF_VEC_P(const_char_p); 1540 DEF_VEC_ALLOC_P(const_char_p,heap); 1541 1542 /* Vector of pointers to arguments in the current line of specifications. */ 1543 1544 static VEC(const_char_p,heap) *argbuf; 1545 1546 /* Position in the argbuf vector containing the name of the output file 1547 (the value associated with the "-o" flag). */ 1548 1549 static int have_o_argbuf_index = 0; 1550 1551 /* Were the options -c, -S or -E passed. */ 1552 static int have_c = 0; 1553 1554 /* Was the option -o passed. */ 1555 static int have_o = 0; 1556 1557 /* This is the list of suffixes and codes (%g/%u/%U/%j) and the associated 1558 temp file. If the HOST_BIT_BUCKET is used for %j, no entry is made for 1559 it here. */ 1560 1561 static struct temp_name { 1562 const char *suffix; /* suffix associated with the code. */ 1563 int length; /* strlen (suffix). */ 1564 int unique; /* Indicates whether %g or %u/%U was used. */ 1565 const char *filename; /* associated filename. */ 1566 int filename_length; /* strlen (filename). */ 1567 struct temp_name *next; 1568 } *temp_names; 1569 1570 /* Number of commands executed so far. */ 1571 1572 static int execution_count; 1573 1574 /* Number of commands that exited with a signal. */ 1575 1576 static int signal_count; 1577 1578 /* Allocate the argument vector. */ 1579 1580 static void 1581 alloc_args (void) 1582 { 1583 argbuf = VEC_alloc (const_char_p, heap, 10); 1584 } 1585 1586 /* Clear out the vector of arguments (after a command is executed). */ 1587 1588 static void 1589 clear_args (void) 1590 { 1591 VEC_truncate (const_char_p, argbuf, 0); 1592 } 1593 1594 /* Add one argument to the vector at the end. 1595 This is done when a space is seen or at the end of the line. 1596 If DELETE_ALWAYS is nonzero, the arg is a filename 1597 and the file should be deleted eventually. 1598 If DELETE_FAILURE is nonzero, the arg is a filename 1599 and the file should be deleted if this compilation fails. */ 1600 1601 static void 1602 store_arg (const char *arg, int delete_always, int delete_failure) 1603 { 1604 VEC_safe_push (const_char_p, heap, argbuf, arg); 1605 1606 if (strcmp (arg, "-o") == 0) 1607 have_o_argbuf_index = VEC_length (const_char_p, argbuf); 1608 if (delete_always || delete_failure) 1609 { 1610 const char *p; 1611 /* If the temporary file we should delete is specified as 1612 part of a joined argument extract the filename. */ 1613 if (arg[0] == '-' 1614 && (p = strrchr (arg, '='))) 1615 arg = p + 1; 1616 record_temp_file (arg, delete_always, delete_failure); 1617 } 1618 } 1619 1620 /* Load specs from a file name named FILENAME, replacing occurrences of 1621 various different types of line-endings, \r\n, \n\r and just \r, with 1622 a single \n. */ 1623 1624 static char * 1625 load_specs (const char *filename) 1626 { 1627 int desc; 1628 int readlen; 1629 struct stat statbuf; 1630 char *buffer; 1631 char *buffer_p; 1632 char *specs; 1633 char *specs_p; 1634 1635 if (verbose_flag) 1636 fnotice (stderr, "Reading specs from %s\n", filename); 1637 1638 /* Open and stat the file. */ 1639 desc = open (filename, O_RDONLY, 0); 1640 if (desc < 0) 1641 pfatal_with_name (filename); 1642 if (stat (filename, &statbuf) < 0) 1643 pfatal_with_name (filename); 1644 1645 /* Read contents of file into BUFFER. */ 1646 buffer = XNEWVEC (char, statbuf.st_size + 1); 1647 readlen = read (desc, buffer, (unsigned) statbuf.st_size); 1648 if (readlen < 0) 1649 pfatal_with_name (filename); 1650 buffer[readlen] = 0; 1651 close (desc); 1652 1653 specs = XNEWVEC (char, readlen + 1); 1654 specs_p = specs; 1655 for (buffer_p = buffer; buffer_p && *buffer_p; buffer_p++) 1656 { 1657 int skip = 0; 1658 char c = *buffer_p; 1659 if (c == '\r') 1660 { 1661 if (buffer_p > buffer && *(buffer_p - 1) == '\n') /* \n\r */ 1662 skip = 1; 1663 else if (*(buffer_p + 1) == '\n') /* \r\n */ 1664 skip = 1; 1665 else /* \r */ 1666 c = '\n'; 1667 } 1668 if (! skip) 1669 *specs_p++ = c; 1670 } 1671 *specs_p = '\0'; 1672 1673 free (buffer); 1674 return (specs); 1675 } 1676 1677 /* Read compilation specs from a file named FILENAME, 1678 replacing the default ones. 1679 1680 A suffix which starts with `*' is a definition for 1681 one of the machine-specific sub-specs. The "suffix" should be 1682 *asm, *cc1, *cpp, *link, *startfile, etc. 1683 The corresponding spec is stored in asm_spec, etc., 1684 rather than in the `compilers' vector. 1685 1686 Anything invalid in the file is a fatal error. */ 1687 1688 static void 1689 read_specs (const char *filename, int main_p) 1690 { 1691 char *buffer; 1692 char *p; 1693 1694 buffer = load_specs (filename); 1695 1696 /* Scan BUFFER for specs, putting them in the vector. */ 1697 p = buffer; 1698 while (1) 1699 { 1700 char *suffix; 1701 char *spec; 1702 char *in, *out, *p1, *p2, *p3; 1703 1704 /* Advance P in BUFFER to the next nonblank nocomment line. */ 1705 p = skip_whitespace (p); 1706 if (*p == 0) 1707 break; 1708 1709 /* Is this a special command that starts with '%'? */ 1710 /* Don't allow this for the main specs file, since it would 1711 encourage people to overwrite it. */ 1712 if (*p == '%' && !main_p) 1713 { 1714 p1 = p; 1715 while (*p && *p != '\n') 1716 p++; 1717 1718 /* Skip '\n'. */ 1719 p++; 1720 1721 if (!strncmp (p1, "%include", sizeof ("%include") - 1) 1722 && (p1[sizeof "%include" - 1] == ' ' 1723 || p1[sizeof "%include" - 1] == '\t')) 1724 { 1725 char *new_filename; 1726 1727 p1 += sizeof ("%include"); 1728 while (*p1 == ' ' || *p1 == '\t') 1729 p1++; 1730 1731 if (*p1++ != '<' || p[-2] != '>') 1732 fatal_error ("specs %%include syntax malformed after " 1733 "%ld characters", 1734 (long) (p1 - buffer + 1)); 1735 1736 p[-2] = '\0'; 1737 new_filename = find_a_file (&startfile_prefixes, p1, R_OK, true); 1738 read_specs (new_filename ? new_filename : p1, FALSE); 1739 continue; 1740 } 1741 else if (!strncmp (p1, "%include_noerr", sizeof "%include_noerr" - 1) 1742 && (p1[sizeof "%include_noerr" - 1] == ' ' 1743 || p1[sizeof "%include_noerr" - 1] == '\t')) 1744 { 1745 char *new_filename; 1746 1747 p1 += sizeof "%include_noerr"; 1748 while (*p1 == ' ' || *p1 == '\t') 1749 p1++; 1750 1751 if (*p1++ != '<' || p[-2] != '>') 1752 fatal_error ("specs %%include syntax malformed after " 1753 "%ld characters", 1754 (long) (p1 - buffer + 1)); 1755 1756 p[-2] = '\0'; 1757 new_filename = find_a_file (&startfile_prefixes, p1, R_OK, true); 1758 if (new_filename) 1759 read_specs (new_filename, FALSE); 1760 else if (verbose_flag) 1761 fnotice (stderr, "could not find specs file %s\n", p1); 1762 continue; 1763 } 1764 else if (!strncmp (p1, "%rename", sizeof "%rename" - 1) 1765 && (p1[sizeof "%rename" - 1] == ' ' 1766 || p1[sizeof "%rename" - 1] == '\t')) 1767 { 1768 int name_len; 1769 struct spec_list *sl; 1770 struct spec_list *newsl; 1771 1772 /* Get original name. */ 1773 p1 += sizeof "%rename"; 1774 while (*p1 == ' ' || *p1 == '\t') 1775 p1++; 1776 1777 if (! ISALPHA ((unsigned char) *p1)) 1778 fatal_error ("specs %%rename syntax malformed after " 1779 "%ld characters", 1780 (long) (p1 - buffer)); 1781 1782 p2 = p1; 1783 while (*p2 && !ISSPACE ((unsigned char) *p2)) 1784 p2++; 1785 1786 if (*p2 != ' ' && *p2 != '\t') 1787 fatal_error ("specs %%rename syntax malformed after " 1788 "%ld characters", 1789 (long) (p2 - buffer)); 1790 1791 name_len = p2 - p1; 1792 *p2++ = '\0'; 1793 while (*p2 == ' ' || *p2 == '\t') 1794 p2++; 1795 1796 if (! ISALPHA ((unsigned char) *p2)) 1797 fatal_error ("specs %%rename syntax malformed after " 1798 "%ld characters", 1799 (long) (p2 - buffer)); 1800 1801 /* Get new spec name. */ 1802 p3 = p2; 1803 while (*p3 && !ISSPACE ((unsigned char) *p3)) 1804 p3++; 1805 1806 if (p3 != p - 1) 1807 fatal_error ("specs %%rename syntax malformed after " 1808 "%ld characters", 1809 (long) (p3 - buffer)); 1810 *p3 = '\0'; 1811 1812 for (sl = specs; sl; sl = sl->next) 1813 if (name_len == sl->name_len && !strcmp (sl->name, p1)) 1814 break; 1815 1816 if (!sl) 1817 fatal_error ("specs %s spec was not found to be renamed", p1); 1818 1819 if (strcmp (p1, p2) == 0) 1820 continue; 1821 1822 for (newsl = specs; newsl; newsl = newsl->next) 1823 if (strcmp (newsl->name, p2) == 0) 1824 fatal_error ("%s: attempt to rename spec %qs to " 1825 "already defined spec %qs", 1826 filename, p1, p2); 1827 1828 if (verbose_flag) 1829 { 1830 fnotice (stderr, "rename spec %s to %s\n", p1, p2); 1831 #ifdef DEBUG_SPECS 1832 fnotice (stderr, "spec is '%s'\n\n", *(sl->ptr_spec)); 1833 #endif 1834 } 1835 1836 set_spec (p2, *(sl->ptr_spec)); 1837 if (sl->alloc_p) 1838 free (CONST_CAST (char *, *(sl->ptr_spec))); 1839 1840 *(sl->ptr_spec) = ""; 1841 sl->alloc_p = 0; 1842 continue; 1843 } 1844 else 1845 fatal_error ("specs unknown %% command after %ld characters", 1846 (long) (p1 - buffer)); 1847 } 1848 1849 /* Find the colon that should end the suffix. */ 1850 p1 = p; 1851 while (*p1 && *p1 != ':' && *p1 != '\n') 1852 p1++; 1853 1854 /* The colon shouldn't be missing. */ 1855 if (*p1 != ':') 1856 fatal_error ("specs file malformed after %ld characters", 1857 (long) (p1 - buffer)); 1858 1859 /* Skip back over trailing whitespace. */ 1860 p2 = p1; 1861 while (p2 > buffer && (p2[-1] == ' ' || p2[-1] == '\t')) 1862 p2--; 1863 1864 /* Copy the suffix to a string. */ 1865 suffix = save_string (p, p2 - p); 1866 /* Find the next line. */ 1867 p = skip_whitespace (p1 + 1); 1868 if (p[1] == 0) 1869 fatal_error ("specs file malformed after %ld characters", 1870 (long) (p - buffer)); 1871 1872 p1 = p; 1873 /* Find next blank line or end of string. */ 1874 while (*p1 && !(*p1 == '\n' && (p1[1] == '\n' || p1[1] == '\0'))) 1875 p1++; 1876 1877 /* Specs end at the blank line and do not include the newline. */ 1878 spec = save_string (p, p1 - p); 1879 p = p1; 1880 1881 /* Delete backslash-newline sequences from the spec. */ 1882 in = spec; 1883 out = spec; 1884 while (*in != 0) 1885 { 1886 if (in[0] == '\\' && in[1] == '\n') 1887 in += 2; 1888 else if (in[0] == '#') 1889 while (*in && *in != '\n') 1890 in++; 1891 1892 else 1893 *out++ = *in++; 1894 } 1895 *out = 0; 1896 1897 if (suffix[0] == '*') 1898 { 1899 if (! strcmp (suffix, "*link_command")) 1900 link_command_spec = spec; 1901 else 1902 set_spec (suffix + 1, spec); 1903 } 1904 else 1905 { 1906 /* Add this pair to the vector. */ 1907 compilers 1908 = XRESIZEVEC (struct compiler, compilers, n_compilers + 2); 1909 1910 compilers[n_compilers].suffix = suffix; 1911 compilers[n_compilers].spec = spec; 1912 n_compilers++; 1913 memset (&compilers[n_compilers], 0, sizeof compilers[n_compilers]); 1914 } 1915 1916 if (*suffix == 0) 1917 link_command_spec = spec; 1918 } 1919 1920 if (link_command_spec == 0) 1921 fatal_error ("spec file has no spec for linking"); 1922 } 1923 1924 /* Record the names of temporary files we tell compilers to write, 1925 and delete them at the end of the run. */ 1926 1927 /* This is the common prefix we use to make temp file names. 1928 It is chosen once for each run of this program. 1929 It is substituted into a spec by %g or %j. 1930 Thus, all temp file names contain this prefix. 1931 In practice, all temp file names start with this prefix. 1932 1933 This prefix comes from the envvar TMPDIR if it is defined; 1934 otherwise, from the P_tmpdir macro if that is defined; 1935 otherwise, in /usr/tmp or /tmp; 1936 or finally the current directory if all else fails. */ 1937 1938 static const char *temp_filename; 1939 1940 /* Length of the prefix. */ 1941 1942 static int temp_filename_length; 1943 1944 /* Define the list of temporary files to delete. */ 1945 1946 struct temp_file 1947 { 1948 const char *name; 1949 struct temp_file *next; 1950 }; 1951 1952 /* Queue of files to delete on success or failure of compilation. */ 1953 static struct temp_file *always_delete_queue; 1954 /* Queue of files to delete on failure of compilation. */ 1955 static struct temp_file *failure_delete_queue; 1956 1957 /* Record FILENAME as a file to be deleted automatically. 1958 ALWAYS_DELETE nonzero means delete it if all compilation succeeds; 1959 otherwise delete it in any case. 1960 FAIL_DELETE nonzero means delete it if a compilation step fails; 1961 otherwise delete it in any case. */ 1962 1963 void 1964 record_temp_file (const char *filename, int always_delete, int fail_delete) 1965 { 1966 char *const name = xstrdup (filename); 1967 1968 if (always_delete) 1969 { 1970 struct temp_file *temp; 1971 for (temp = always_delete_queue; temp; temp = temp->next) 1972 if (! filename_cmp (name, temp->name)) 1973 goto already1; 1974 1975 temp = XNEW (struct temp_file); 1976 temp->next = always_delete_queue; 1977 temp->name = name; 1978 always_delete_queue = temp; 1979 1980 already1:; 1981 } 1982 1983 if (fail_delete) 1984 { 1985 struct temp_file *temp; 1986 for (temp = failure_delete_queue; temp; temp = temp->next) 1987 if (! filename_cmp (name, temp->name)) 1988 goto already2; 1989 1990 temp = XNEW (struct temp_file); 1991 temp->next = failure_delete_queue; 1992 temp->name = name; 1993 failure_delete_queue = temp; 1994 1995 already2:; 1996 } 1997 } 1998 1999 /* Delete all the temporary files whose names we previously recorded. */ 2000 2001 #ifndef DELETE_IF_ORDINARY 2002 #define DELETE_IF_ORDINARY(NAME,ST,VERBOSE_FLAG) \ 2003 do \ 2004 { \ 2005 if (stat (NAME, &ST) >= 0 && S_ISREG (ST.st_mode)) \ 2006 if (unlink (NAME) < 0) \ 2007 if (VERBOSE_FLAG) \ 2008 perror_with_name (NAME); \ 2009 } while (0) 2010 #endif 2011 2012 static void 2013 delete_if_ordinary (const char *name) 2014 { 2015 struct stat st; 2016 #ifdef DEBUG 2017 int i, c; 2018 2019 printf ("Delete %s? (y or n) ", name); 2020 fflush (stdout); 2021 i = getchar (); 2022 if (i != '\n') 2023 while ((c = getchar ()) != '\n' && c != EOF) 2024 ; 2025 2026 if (i == 'y' || i == 'Y') 2027 #endif /* DEBUG */ 2028 DELETE_IF_ORDINARY (name, st, verbose_flag); 2029 } 2030 2031 static void 2032 delete_temp_files (void) 2033 { 2034 struct temp_file *temp; 2035 2036 for (temp = always_delete_queue; temp; temp = temp->next) 2037 delete_if_ordinary (temp->name); 2038 always_delete_queue = 0; 2039 } 2040 2041 /* Delete all the files to be deleted on error. */ 2042 2043 static void 2044 delete_failure_queue (void) 2045 { 2046 struct temp_file *temp; 2047 2048 for (temp = failure_delete_queue; temp; temp = temp->next) 2049 delete_if_ordinary (temp->name); 2050 } 2051 2052 static void 2053 clear_failure_queue (void) 2054 { 2055 failure_delete_queue = 0; 2056 } 2057 2058 /* Call CALLBACK for each path in PATHS, breaking out early if CALLBACK 2059 returns non-NULL. 2060 If DO_MULTI is true iterate over the paths twice, first with multilib 2061 suffix then without, otherwise iterate over the paths once without 2062 adding a multilib suffix. When DO_MULTI is true, some attempt is made 2063 to avoid visiting the same path twice, but we could do better. For 2064 instance, /usr/lib/../lib is considered different from /usr/lib. 2065 At least EXTRA_SPACE chars past the end of the path passed to 2066 CALLBACK are available for use by the callback. 2067 CALLBACK_INFO allows extra parameters to be passed to CALLBACK. 2068 2069 Returns the value returned by CALLBACK. */ 2070 2071 static void * 2072 for_each_path (const struct path_prefix *paths, 2073 bool do_multi, 2074 size_t extra_space, 2075 void *(*callback) (char *, void *), 2076 void *callback_info) 2077 { 2078 struct prefix_list *pl; 2079 const char *multi_dir = NULL; 2080 const char *multi_os_dir = NULL; 2081 const char *multi_suffix; 2082 const char *just_multi_suffix; 2083 char *path = NULL; 2084 void *ret = NULL; 2085 bool skip_multi_dir = false; 2086 bool skip_multi_os_dir = false; 2087 2088 multi_suffix = machine_suffix; 2089 just_multi_suffix = just_machine_suffix; 2090 if (do_multi && multilib_dir && strcmp (multilib_dir, ".") != 0) 2091 { 2092 multi_dir = concat (multilib_dir, dir_separator_str, NULL); 2093 multi_suffix = concat (multi_suffix, multi_dir, NULL); 2094 just_multi_suffix = concat (just_multi_suffix, multi_dir, NULL); 2095 } 2096 if (do_multi && multilib_os_dir && strcmp (multilib_os_dir, ".") != 0) 2097 multi_os_dir = concat (multilib_os_dir, dir_separator_str, NULL); 2098 2099 while (1) 2100 { 2101 size_t multi_dir_len = 0; 2102 size_t multi_os_dir_len = 0; 2103 size_t suffix_len; 2104 size_t just_suffix_len; 2105 size_t len; 2106 2107 if (multi_dir) 2108 multi_dir_len = strlen (multi_dir); 2109 if (multi_os_dir) 2110 multi_os_dir_len = strlen (multi_os_dir); 2111 suffix_len = strlen (multi_suffix); 2112 just_suffix_len = strlen (just_multi_suffix); 2113 2114 if (path == NULL) 2115 { 2116 len = paths->max_len + extra_space + 1; 2117 if (suffix_len > multi_os_dir_len) 2118 len += suffix_len; 2119 else 2120 len += multi_os_dir_len; 2121 path = XNEWVEC (char, len); 2122 } 2123 2124 for (pl = paths->plist; pl != 0; pl = pl->next) 2125 { 2126 len = strlen (pl->prefix); 2127 memcpy (path, pl->prefix, len); 2128 2129 /* Look first in MACHINE/VERSION subdirectory. */ 2130 if (!skip_multi_dir) 2131 { 2132 memcpy (path + len, multi_suffix, suffix_len + 1); 2133 ret = callback (path, callback_info); 2134 if (ret) 2135 break; 2136 } 2137 2138 /* Some paths are tried with just the machine (ie. target) 2139 subdir. This is used for finding as, ld, etc. */ 2140 if (!skip_multi_dir 2141 && pl->require_machine_suffix == 2) 2142 { 2143 memcpy (path + len, just_multi_suffix, just_suffix_len + 1); 2144 ret = callback (path, callback_info); 2145 if (ret) 2146 break; 2147 } 2148 2149 /* Now try the base path. */ 2150 if (!pl->require_machine_suffix 2151 && !(pl->os_multilib ? skip_multi_os_dir : skip_multi_dir)) 2152 { 2153 const char *this_multi; 2154 size_t this_multi_len; 2155 2156 if (pl->os_multilib) 2157 { 2158 this_multi = multi_os_dir; 2159 this_multi_len = multi_os_dir_len; 2160 } 2161 else 2162 { 2163 this_multi = multi_dir; 2164 this_multi_len = multi_dir_len; 2165 } 2166 2167 if (this_multi_len) 2168 memcpy (path + len, this_multi, this_multi_len + 1); 2169 else 2170 path[len] = '\0'; 2171 2172 ret = callback (path, callback_info); 2173 if (ret) 2174 break; 2175 } 2176 } 2177 if (pl) 2178 break; 2179 2180 if (multi_dir == NULL && multi_os_dir == NULL) 2181 break; 2182 2183 /* Run through the paths again, this time without multilibs. 2184 Don't repeat any we have already seen. */ 2185 if (multi_dir) 2186 { 2187 free (CONST_CAST (char *, multi_dir)); 2188 multi_dir = NULL; 2189 free (CONST_CAST (char *, multi_suffix)); 2190 multi_suffix = machine_suffix; 2191 free (CONST_CAST (char *, just_multi_suffix)); 2192 just_multi_suffix = just_machine_suffix; 2193 } 2194 else 2195 skip_multi_dir = true; 2196 if (multi_os_dir) 2197 { 2198 free (CONST_CAST (char *, multi_os_dir)); 2199 multi_os_dir = NULL; 2200 } 2201 else 2202 skip_multi_os_dir = true; 2203 } 2204 2205 if (multi_dir) 2206 { 2207 free (CONST_CAST (char *, multi_dir)); 2208 free (CONST_CAST (char *, multi_suffix)); 2209 free (CONST_CAST (char *, just_multi_suffix)); 2210 } 2211 if (multi_os_dir) 2212 free (CONST_CAST (char *, multi_os_dir)); 2213 if (ret != path) 2214 free (path); 2215 return ret; 2216 } 2217 2218 /* Callback for build_search_list. Adds path to obstack being built. */ 2219 2220 struct add_to_obstack_info { 2221 struct obstack *ob; 2222 bool check_dir; 2223 bool first_time; 2224 }; 2225 2226 static void * 2227 add_to_obstack (char *path, void *data) 2228 { 2229 struct add_to_obstack_info *info = (struct add_to_obstack_info *) data; 2230 2231 if (info->check_dir && !is_directory (path, false)) 2232 return NULL; 2233 2234 if (!info->first_time) 2235 obstack_1grow (info->ob, PATH_SEPARATOR); 2236 2237 obstack_grow (info->ob, path, strlen (path)); 2238 2239 info->first_time = false; 2240 return NULL; 2241 } 2242 2243 /* Add or change the value of an environment variable, outputting the 2244 change to standard error if in verbose mode. */ 2245 static void 2246 xputenv (const char *string) 2247 { 2248 if (verbose_flag) 2249 fnotice (stderr, "%s\n", string); 2250 putenv (CONST_CAST (char *, string)); 2251 } 2252 2253 /* Build a list of search directories from PATHS. 2254 PREFIX is a string to prepend to the list. 2255 If CHECK_DIR_P is true we ensure the directory exists. 2256 If DO_MULTI is true, multilib paths are output first, then 2257 non-multilib paths. 2258 This is used mostly by putenv_from_prefixes so we use `collect_obstack'. 2259 It is also used by the --print-search-dirs flag. */ 2260 2261 static char * 2262 build_search_list (const struct path_prefix *paths, const char *prefix, 2263 bool check_dir, bool do_multi) 2264 { 2265 struct add_to_obstack_info info; 2266 2267 info.ob = &collect_obstack; 2268 info.check_dir = check_dir; 2269 info.first_time = true; 2270 2271 obstack_grow (&collect_obstack, prefix, strlen (prefix)); 2272 obstack_1grow (&collect_obstack, '='); 2273 2274 for_each_path (paths, do_multi, 0, add_to_obstack, &info); 2275 2276 obstack_1grow (&collect_obstack, '\0'); 2277 return XOBFINISH (&collect_obstack, char *); 2278 } 2279 2280 /* Rebuild the COMPILER_PATH and LIBRARY_PATH environment variables 2281 for collect. */ 2282 2283 static void 2284 putenv_from_prefixes (const struct path_prefix *paths, const char *env_var, 2285 bool do_multi) 2286 { 2287 xputenv (build_search_list (paths, env_var, true, do_multi)); 2288 } 2289 2290 /* Check whether NAME can be accessed in MODE. This is like access, 2291 except that it never considers directories to be executable. */ 2292 2293 static int 2294 access_check (const char *name, int mode) 2295 { 2296 if (mode == X_OK) 2297 { 2298 struct stat st; 2299 2300 if (stat (name, &st) < 0 2301 || S_ISDIR (st.st_mode)) 2302 return -1; 2303 } 2304 2305 return access (name, mode); 2306 } 2307 2308 /* Callback for find_a_file. Appends the file name to the directory 2309 path. If the resulting file exists in the right mode, return the 2310 full pathname to the file. */ 2311 2312 struct file_at_path_info { 2313 const char *name; 2314 const char *suffix; 2315 int name_len; 2316 int suffix_len; 2317 int mode; 2318 }; 2319 2320 static void * 2321 file_at_path (char *path, void *data) 2322 { 2323 struct file_at_path_info *info = (struct file_at_path_info *) data; 2324 size_t len = strlen (path); 2325 2326 memcpy (path + len, info->name, info->name_len); 2327 len += info->name_len; 2328 2329 /* Some systems have a suffix for executable files. 2330 So try appending that first. */ 2331 if (info->suffix_len) 2332 { 2333 memcpy (path + len, info->suffix, info->suffix_len + 1); 2334 if (access_check (path, info->mode) == 0) 2335 return path; 2336 } 2337 2338 path[len] = '\0'; 2339 if (access_check (path, info->mode) == 0) 2340 return path; 2341 2342 return NULL; 2343 } 2344 2345 /* Search for NAME using the prefix list PREFIXES. MODE is passed to 2346 access to check permissions. If DO_MULTI is true, search multilib 2347 paths then non-multilib paths, otherwise do not search multilib paths. 2348 Return 0 if not found, otherwise return its name, allocated with malloc. */ 2349 2350 static char * 2351 find_a_file (const struct path_prefix *pprefix, const char *name, int mode, 2352 bool do_multi) 2353 { 2354 struct file_at_path_info info; 2355 2356 #ifdef DEFAULT_ASSEMBLER 2357 if (! strcmp (name, "as") && access (DEFAULT_ASSEMBLER, mode) == 0) 2358 return xstrdup (DEFAULT_ASSEMBLER); 2359 #endif 2360 2361 #ifdef DEFAULT_LINKER 2362 if (! strcmp(name, "ld") && access (DEFAULT_LINKER, mode) == 0) 2363 return xstrdup (DEFAULT_LINKER); 2364 #endif 2365 2366 /* Determine the filename to execute (special case for absolute paths). */ 2367 2368 if (IS_ABSOLUTE_PATH (name)) 2369 { 2370 if (access (name, mode) == 0) 2371 return xstrdup (name); 2372 2373 return NULL; 2374 } 2375 2376 info.name = name; 2377 info.suffix = (mode & X_OK) != 0 ? HOST_EXECUTABLE_SUFFIX : ""; 2378 info.name_len = strlen (info.name); 2379 info.suffix_len = strlen (info.suffix); 2380 info.mode = mode; 2381 2382 return (char*) for_each_path (pprefix, do_multi, 2383 info.name_len + info.suffix_len, 2384 file_at_path, &info); 2385 } 2386 2387 /* Ranking of prefixes in the sort list. -B prefixes are put before 2388 all others. */ 2389 2390 enum path_prefix_priority 2391 { 2392 PREFIX_PRIORITY_B_OPT, 2393 PREFIX_PRIORITY_LAST 2394 }; 2395 2396 /* Add an entry for PREFIX in PLIST. The PLIST is kept in ascending 2397 order according to PRIORITY. Within each PRIORITY, new entries are 2398 appended. 2399 2400 If WARN is nonzero, we will warn if no file is found 2401 through this prefix. WARN should point to an int 2402 which will be set to 1 if this entry is used. 2403 2404 COMPONENT is the value to be passed to update_path. 2405 2406 REQUIRE_MACHINE_SUFFIX is 1 if this prefix can't be used without 2407 the complete value of machine_suffix. 2408 2 means try both machine_suffix and just_machine_suffix. */ 2409 2410 static void 2411 add_prefix (struct path_prefix *pprefix, const char *prefix, 2412 const char *component, /* enum prefix_priority */ int priority, 2413 int require_machine_suffix, int os_multilib) 2414 { 2415 struct prefix_list *pl, **prev; 2416 int len; 2417 2418 for (prev = &pprefix->plist; 2419 (*prev) != NULL && (*prev)->priority <= priority; 2420 prev = &(*prev)->next) 2421 ; 2422 2423 /* Keep track of the longest prefix. */ 2424 2425 prefix = update_path (prefix, component); 2426 len = strlen (prefix); 2427 if (len > pprefix->max_len) 2428 pprefix->max_len = len; 2429 2430 pl = XNEW (struct prefix_list); 2431 pl->prefix = prefix; 2432 pl->require_machine_suffix = require_machine_suffix; 2433 pl->priority = priority; 2434 pl->os_multilib = os_multilib; 2435 2436 /* Insert after PREV. */ 2437 pl->next = (*prev); 2438 (*prev) = pl; 2439 } 2440 2441 /* Same as add_prefix, but prepending target_system_root to prefix. */ 2442 /* The target_system_root prefix has been relocated by gcc_exec_prefix. */ 2443 static void 2444 add_sysrooted_prefix (struct path_prefix *pprefix, const char *prefix, 2445 const char *component, 2446 /* enum prefix_priority */ int priority, 2447 int require_machine_suffix, int os_multilib) 2448 { 2449 if (!IS_ABSOLUTE_PATH (prefix)) 2450 fatal_error ("system path %qs is not absolute", prefix); 2451 2452 if (target_system_root) 2453 { 2454 char *sysroot_no_trailing_dir_separator = xstrdup (target_system_root); 2455 size_t sysroot_len = strlen (target_system_root); 2456 2457 if (sysroot_len > 0 2458 && target_system_root[sysroot_len - 1] == DIR_SEPARATOR) 2459 sysroot_no_trailing_dir_separator[sysroot_len - 1] = '\0'; 2460 2461 if (target_sysroot_suffix) 2462 prefix = concat (target_sysroot_suffix, prefix, NULL); 2463 prefix = concat (sysroot_no_trailing_dir_separator, prefix, NULL); 2464 free (sysroot_no_trailing_dir_separator); 2465 2466 /* We have to override this because GCC's notion of sysroot 2467 moves along with GCC. */ 2468 component = "GCC"; 2469 } 2470 2471 add_prefix (pprefix, prefix, component, priority, 2472 require_machine_suffix, os_multilib); 2473 } 2474 2475 /* Execute the command specified by the arguments on the current line of spec. 2476 When using pipes, this includes several piped-together commands 2477 with `|' between them. 2478 2479 Return 0 if successful, -1 if failed. */ 2480 2481 static int 2482 execute (void) 2483 { 2484 int i; 2485 int n_commands; /* # of command. */ 2486 char *string; 2487 struct pex_obj *pex; 2488 struct command 2489 { 2490 const char *prog; /* program name. */ 2491 const char **argv; /* vector of args. */ 2492 }; 2493 const char *arg; 2494 2495 struct command *commands; /* each command buffer with above info. */ 2496 2497 gcc_assert (!processing_spec_function); 2498 2499 if (wrapper_string) 2500 { 2501 string = find_a_file (&exec_prefixes, 2502 VEC_index (const_char_p, argbuf, 0), X_OK, false); 2503 if (string) 2504 VEC_replace (const_char_p, argbuf, 0, string); 2505 insert_wrapper (wrapper_string); 2506 } 2507 2508 /* Count # of piped commands. */ 2509 for (n_commands = 1, i = 0; VEC_iterate (const_char_p, argbuf, i, arg); i++) 2510 if (strcmp (arg, "|") == 0) 2511 n_commands++; 2512 2513 /* Get storage for each command. */ 2514 commands = (struct command *) alloca (n_commands * sizeof (struct command)); 2515 2516 /* Split argbuf into its separate piped processes, 2517 and record info about each one. 2518 Also search for the programs that are to be run. */ 2519 2520 VEC_safe_push (const_char_p, heap, argbuf, 0); 2521 2522 commands[0].prog = VEC_index (const_char_p, argbuf, 0); /* first command. */ 2523 commands[0].argv = VEC_address (const_char_p, argbuf); 2524 2525 if (!wrapper_string) 2526 { 2527 string = find_a_file (&exec_prefixes, commands[0].prog, X_OK, false); 2528 commands[0].argv[0] = (string) ? string : commands[0].argv[0]; 2529 } 2530 2531 for (n_commands = 1, i = 0; VEC_iterate (const_char_p, argbuf, i, arg); i++) 2532 if (arg && strcmp (arg, "|") == 0) 2533 { /* each command. */ 2534 #if defined (__MSDOS__) || defined (OS2) || defined (VMS) 2535 fatal_error ("-pipe not supported"); 2536 #endif 2537 VEC_replace (const_char_p, argbuf, i, 0); /* Termination of 2538 command args. */ 2539 commands[n_commands].prog = VEC_index (const_char_p, argbuf, i + 1); 2540 commands[n_commands].argv 2541 = &(VEC_address (const_char_p, argbuf))[i + 1]; 2542 string = find_a_file (&exec_prefixes, commands[n_commands].prog, 2543 X_OK, false); 2544 if (string) 2545 commands[n_commands].argv[0] = string; 2546 n_commands++; 2547 } 2548 2549 /* If -v, print what we are about to do, and maybe query. */ 2550 2551 if (verbose_flag) 2552 { 2553 /* For help listings, put a blank line between sub-processes. */ 2554 if (print_help_list) 2555 fputc ('\n', stderr); 2556 2557 /* Print each piped command as a separate line. */ 2558 for (i = 0; i < n_commands; i++) 2559 { 2560 const char *const *j; 2561 2562 if (verbose_only_flag) 2563 { 2564 for (j = commands[i].argv; *j; j++) 2565 { 2566 const char *p; 2567 for (p = *j; *p; ++p) 2568 if (!ISALNUM ((unsigned char) *p) 2569 && *p != '_' && *p != '/' && *p != '-' && *p != '.') 2570 break; 2571 if (*p || !*j) 2572 { 2573 fprintf (stderr, " \""); 2574 for (p = *j; *p; ++p) 2575 { 2576 if (*p == '"' || *p == '\\' || *p == '$') 2577 fputc ('\\', stderr); 2578 fputc (*p, stderr); 2579 } 2580 fputc ('"', stderr); 2581 } 2582 /* If it's empty, print "". */ 2583 else if (!**j) 2584 fprintf (stderr, " \"\""); 2585 else 2586 fprintf (stderr, " %s", *j); 2587 } 2588 } 2589 else 2590 for (j = commands[i].argv; *j; j++) 2591 /* If it's empty, print "". */ 2592 if (!**j) 2593 fprintf (stderr, " \"\""); 2594 else 2595 fprintf (stderr, " %s", *j); 2596 2597 /* Print a pipe symbol after all but the last command. */ 2598 if (i + 1 != n_commands) 2599 fprintf (stderr, " |"); 2600 fprintf (stderr, "\n"); 2601 } 2602 fflush (stderr); 2603 if (verbose_only_flag != 0) 2604 { 2605 /* verbose_only_flag should act as if the spec was 2606 executed, so increment execution_count before 2607 returning. This prevents spurious warnings about 2608 unused linker input files, etc. */ 2609 execution_count++; 2610 return 0; 2611 } 2612 #ifdef DEBUG 2613 fnotice (stderr, "\nGo ahead? (y or n) "); 2614 fflush (stderr); 2615 i = getchar (); 2616 if (i != '\n') 2617 while (getchar () != '\n') 2618 ; 2619 2620 if (i != 'y' && i != 'Y') 2621 return 0; 2622 #endif /* DEBUG */ 2623 } 2624 2625 #ifdef ENABLE_VALGRIND_CHECKING 2626 /* Run the each command through valgrind. To simplify prepending the 2627 path to valgrind and the option "-q" (for quiet operation unless 2628 something triggers), we allocate a separate argv array. */ 2629 2630 for (i = 0; i < n_commands; i++) 2631 { 2632 const char **argv; 2633 int argc; 2634 int j; 2635 2636 for (argc = 0; commands[i].argv[argc] != NULL; argc++) 2637 ; 2638 2639 argv = XALLOCAVEC (const char *, argc + 3); 2640 2641 argv[0] = VALGRIND_PATH; 2642 argv[1] = "-q"; 2643 for (j = 2; j < argc + 2; j++) 2644 argv[j] = commands[i].argv[j - 2]; 2645 argv[j] = NULL; 2646 2647 commands[i].argv = argv; 2648 commands[i].prog = argv[0]; 2649 } 2650 #endif 2651 2652 /* Run each piped subprocess. */ 2653 2654 pex = pex_init (PEX_USE_PIPES | ((report_times || report_times_to_file) 2655 ? PEX_RECORD_TIMES : 0), 2656 progname, temp_filename); 2657 if (pex == NULL) 2658 fatal_error ("pex_init failed: %m"); 2659 2660 for (i = 0; i < n_commands; i++) 2661 { 2662 const char *errmsg; 2663 int err; 2664 const char *string = commands[i].argv[0]; 2665 2666 errmsg = pex_run (pex, 2667 ((i + 1 == n_commands ? PEX_LAST : 0) 2668 | (string == commands[i].prog ? PEX_SEARCH : 0)), 2669 string, CONST_CAST (char **, commands[i].argv), 2670 NULL, NULL, &err); 2671 if (errmsg != NULL) 2672 { 2673 if (err == 0) 2674 fatal_error (errmsg); 2675 else 2676 { 2677 errno = err; 2678 pfatal_with_name (errmsg); 2679 } 2680 } 2681 2682 if (string != commands[i].prog) 2683 free (CONST_CAST (char *, string)); 2684 } 2685 2686 execution_count++; 2687 2688 /* Wait for all the subprocesses to finish. */ 2689 2690 { 2691 int *statuses; 2692 struct pex_time *times = NULL; 2693 int ret_code = 0; 2694 2695 statuses = (int *) alloca (n_commands * sizeof (int)); 2696 if (!pex_get_status (pex, n_commands, statuses)) 2697 fatal_error ("failed to get exit status: %m"); 2698 2699 if (report_times || report_times_to_file) 2700 { 2701 times = (struct pex_time *) alloca (n_commands * sizeof (struct pex_time)); 2702 if (!pex_get_times (pex, n_commands, times)) 2703 fatal_error ("failed to get process times: %m"); 2704 } 2705 2706 pex_free (pex); 2707 2708 for (i = 0; i < n_commands; ++i) 2709 { 2710 int status = statuses[i]; 2711 2712 if (WIFSIGNALED (status)) 2713 { 2714 #ifdef SIGPIPE 2715 /* SIGPIPE is a special case. It happens in -pipe mode 2716 when the compiler dies before the preprocessor is done, 2717 or the assembler dies before the compiler is done. 2718 There's generally been an error already, and this is 2719 just fallout. So don't generate another error unless 2720 we would otherwise have succeeded. */ 2721 if (WTERMSIG (status) == SIGPIPE 2722 && (signal_count || greatest_status >= MIN_FATAL_STATUS)) 2723 { 2724 signal_count++; 2725 ret_code = -1; 2726 } 2727 else 2728 #endif 2729 internal_error ("%s (program %s)", 2730 strsignal (WTERMSIG (status)), commands[i].prog); 2731 } 2732 else if (WIFEXITED (status) 2733 && WEXITSTATUS (status) >= MIN_FATAL_STATUS) 2734 { 2735 if (WEXITSTATUS (status) > greatest_status) 2736 greatest_status = WEXITSTATUS (status); 2737 ret_code = -1; 2738 } 2739 2740 if (report_times || report_times_to_file) 2741 { 2742 struct pex_time *pt = ×[i]; 2743 double ut, st; 2744 2745 ut = ((double) pt->user_seconds 2746 + (double) pt->user_microseconds / 1.0e6); 2747 st = ((double) pt->system_seconds 2748 + (double) pt->system_microseconds / 1.0e6); 2749 2750 if (ut + st != 0) 2751 { 2752 if (report_times) 2753 fnotice (stderr, "# %s %.2f %.2f\n", 2754 commands[i].prog, ut, st); 2755 2756 if (report_times_to_file) 2757 { 2758 int c = 0; 2759 const char *const *j; 2760 2761 fprintf (report_times_to_file, "%g %g", ut, st); 2762 2763 for (j = &commands[i].prog; *j; j = &commands[i].argv[++c]) 2764 { 2765 const char *p; 2766 for (p = *j; *p; ++p) 2767 if (*p == '"' || *p == '\\' || *p == '$' 2768 || ISSPACE (*p)) 2769 break; 2770 2771 if (*p) 2772 { 2773 fprintf (report_times_to_file, " \""); 2774 for (p = *j; *p; ++p) 2775 { 2776 if (*p == '"' || *p == '\\' || *p == '$') 2777 fputc ('\\', report_times_to_file); 2778 fputc (*p, report_times_to_file); 2779 } 2780 fputc ('"', report_times_to_file); 2781 } 2782 else 2783 fprintf (report_times_to_file, " %s", *j); 2784 } 2785 2786 fputc ('\n', report_times_to_file); 2787 } 2788 } 2789 } 2790 } 2791 2792 return ret_code; 2793 } 2794 } 2795 2796 /* Find all the switches given to us 2797 and make a vector describing them. 2798 The elements of the vector are strings, one per switch given. 2799 If a switch uses following arguments, then the `part1' field 2800 is the switch itself and the `args' field 2801 is a null-terminated vector containing the following arguments. 2802 Bits in the `live_cond' field are: 2803 SWITCH_LIVE to indicate this switch is true in a conditional spec. 2804 SWITCH_FALSE to indicate this switch is overridden by a later switch. 2805 SWITCH_IGNORE to indicate this switch should be ignored (used in %<S). 2806 SWITCH_IGNORE_PERMANENTLY to indicate this switch should be ignored 2807 in all do_spec calls afterwards. Used for %<S from self specs. 2808 The `validated' field is nonzero if any spec has looked at this switch; 2809 if it remains zero at the end of the run, it must be meaningless. */ 2810 2811 #define SWITCH_LIVE (1 << 0) 2812 #define SWITCH_FALSE (1 << 1) 2813 #define SWITCH_IGNORE (1 << 2) 2814 #define SWITCH_IGNORE_PERMANENTLY (1 << 3) 2815 #define SWITCH_KEEP_FOR_GCC (1 << 4) 2816 2817 struct switchstr 2818 { 2819 const char *part1; 2820 const char **args; 2821 unsigned int live_cond; 2822 unsigned char validated; 2823 unsigned char ordering; 2824 }; 2825 2826 static struct switchstr *switches; 2827 2828 static int n_switches; 2829 2830 static int n_switches_alloc; 2831 2832 /* Set to zero if -fcompare-debug is disabled, positive if it's 2833 enabled and we're running the first compilation, negative if it's 2834 enabled and we're running the second compilation. For most of the 2835 time, it's in the range -1..1, but it can be temporarily set to 2 2836 or 3 to indicate that the -fcompare-debug flags didn't come from 2837 the command-line, but rather from the GCC_COMPARE_DEBUG environment 2838 variable, until a synthesized -fcompare-debug flag is added to the 2839 command line. */ 2840 int compare_debug; 2841 2842 /* Set to nonzero if we've seen the -fcompare-debug-second flag. */ 2843 int compare_debug_second; 2844 2845 /* Set to the flags that should be passed to the second compilation in 2846 a -fcompare-debug compilation. */ 2847 const char *compare_debug_opt; 2848 2849 static struct switchstr *switches_debug_check[2]; 2850 2851 static int n_switches_debug_check[2]; 2852 2853 static int n_switches_alloc_debug_check[2]; 2854 2855 static char *debug_check_temp_file[2]; 2856 2857 /* Language is one of three things: 2858 2859 1) The name of a real programming language. 2860 2) NULL, indicating that no one has figured out 2861 what it is yet. 2862 3) '*', indicating that the file should be passed 2863 to the linker. */ 2864 struct infile 2865 { 2866 const char *name; 2867 const char *language; 2868 struct compiler *incompiler; 2869 bool compiled; 2870 bool preprocessed; 2871 }; 2872 2873 /* Also a vector of input files specified. */ 2874 2875 static struct infile *infiles; 2876 2877 int n_infiles; 2878 2879 static int n_infiles_alloc; 2880 2881 /* True if multiple input files are being compiled to a single 2882 assembly file. */ 2883 2884 static bool combine_inputs; 2885 2886 /* This counts the number of libraries added by lang_specific_driver, so that 2887 we can tell if there were any user supplied any files or libraries. */ 2888 2889 static int added_libraries; 2890 2891 /* And a vector of corresponding output files is made up later. */ 2892 2893 const char **outfiles; 2894 2895 #if defined(HAVE_TARGET_OBJECT_SUFFIX) || defined(HAVE_TARGET_EXECUTABLE_SUFFIX) 2896 2897 /* Convert NAME to a new name if it is the standard suffix. DO_EXE 2898 is true if we should look for an executable suffix. DO_OBJ 2899 is true if we should look for an object suffix. */ 2900 2901 static const char * 2902 convert_filename (const char *name, int do_exe ATTRIBUTE_UNUSED, 2903 int do_obj ATTRIBUTE_UNUSED) 2904 { 2905 #if defined(HAVE_TARGET_EXECUTABLE_SUFFIX) 2906 int i; 2907 #endif 2908 int len; 2909 2910 if (name == NULL) 2911 return NULL; 2912 2913 len = strlen (name); 2914 2915 #ifdef HAVE_TARGET_OBJECT_SUFFIX 2916 /* Convert x.o to x.obj if TARGET_OBJECT_SUFFIX is ".obj". */ 2917 if (do_obj && len > 2 2918 && name[len - 2] == '.' 2919 && name[len - 1] == 'o') 2920 { 2921 obstack_grow (&obstack, name, len - 2); 2922 obstack_grow0 (&obstack, TARGET_OBJECT_SUFFIX, strlen (TARGET_OBJECT_SUFFIX)); 2923 name = XOBFINISH (&obstack, const char *); 2924 } 2925 #endif 2926 2927 #if defined(HAVE_TARGET_EXECUTABLE_SUFFIX) 2928 /* If there is no filetype, make it the executable suffix (which includes 2929 the "."). But don't get confused if we have just "-o". */ 2930 if (! do_exe || TARGET_EXECUTABLE_SUFFIX[0] == 0 || (len == 2 && name[0] == '-')) 2931 return name; 2932 2933 for (i = len - 1; i >= 0; i--) 2934 if (IS_DIR_SEPARATOR (name[i])) 2935 break; 2936 2937 for (i++; i < len; i++) 2938 if (name[i] == '.') 2939 return name; 2940 2941 obstack_grow (&obstack, name, len); 2942 obstack_grow0 (&obstack, TARGET_EXECUTABLE_SUFFIX, 2943 strlen (TARGET_EXECUTABLE_SUFFIX)); 2944 name = XOBFINISH (&obstack, const char *); 2945 #endif 2946 2947 return name; 2948 } 2949 #endif 2950 2951 /* Display the command line switches accepted by gcc. */ 2952 static void 2953 display_help (void) 2954 { 2955 printf (_("Usage: %s [options] file...\n"), progname); 2956 fputs (_("Options:\n"), stdout); 2957 2958 fputs (_(" -pass-exit-codes Exit with highest error code from a phase\n"), stdout); 2959 fputs (_(" --help Display this information\n"), stdout); 2960 fputs (_(" --target-help Display target specific command line options\n"), stdout); 2961 fputs (_(" --help={common|optimizers|params|target|warnings|[^]{joined|separate|undocumented}}[,...]\n"), stdout); 2962 fputs (_(" Display specific types of command line options\n"), stdout); 2963 if (! verbose_flag) 2964 fputs (_(" (Use '-v --help' to display command line options of sub-processes)\n"), stdout); 2965 fputs (_(" --version Display compiler version information\n"), stdout); 2966 fputs (_(" -dumpspecs Display all of the built in spec strings\n"), stdout); 2967 fputs (_(" -dumpversion Display the version of the compiler\n"), stdout); 2968 fputs (_(" -dumpmachine Display the compiler's target processor\n"), stdout); 2969 fputs (_(" -print-search-dirs Display the directories in the compiler's search path\n"), stdout); 2970 fputs (_(" -print-libgcc-file-name Display the name of the compiler's companion library\n"), stdout); 2971 fputs (_(" -print-file-name=<lib> Display the full path to library <lib>\n"), stdout); 2972 fputs (_(" -print-prog-name=<prog> Display the full path to compiler component <prog>\n"), stdout); 2973 fputs (_(" -print-multi-directory Display the root directory for versions of libgcc\n"), stdout); 2974 fputs (_("\ 2975 -print-multi-lib Display the mapping between command line options and\n\ 2976 multiple library search directories\n"), stdout); 2977 fputs (_(" -print-multi-os-directory Display the relative path to OS libraries\n"), stdout); 2978 fputs (_(" -print-sysroot Display the target libraries directory\n"), stdout); 2979 fputs (_(" -print-sysroot-headers-suffix Display the sysroot suffix used to find headers\n"), stdout); 2980 fputs (_(" -Wa,<options> Pass comma-separated <options> on to the assembler\n"), stdout); 2981 fputs (_(" -Wp,<options> Pass comma-separated <options> on to the preprocessor\n"), stdout); 2982 fputs (_(" -Wl,<options> Pass comma-separated <options> on to the linker\n"), stdout); 2983 fputs (_(" -Xassembler <arg> Pass <arg> on to the assembler\n"), stdout); 2984 fputs (_(" -Xpreprocessor <arg> Pass <arg> on to the preprocessor\n"), stdout); 2985 fputs (_(" -Xlinker <arg> Pass <arg> on to the linker\n"), stdout); 2986 fputs (_(" -save-temps Do not delete intermediate files\n"), stdout); 2987 fputs (_(" -save-temps=<arg> Do not delete intermediate files\n"), stdout); 2988 fputs (_("\ 2989 -no-canonical-prefixes Do not canonicalize paths when building relative\n\ 2990 prefixes to other gcc components\n"), stdout); 2991 fputs (_(" -pipe Use pipes rather than intermediate files\n"), stdout); 2992 fputs (_(" -time Time the execution of each subprocess\n"), stdout); 2993 fputs (_(" -specs=<file> Override built-in specs with the contents of <file>\n"), stdout); 2994 fputs (_(" -std=<standard> Assume that the input sources are for <standard>\n"), stdout); 2995 fputs (_("\ 2996 --sysroot=<directory> Use <directory> as the root directory for headers\n\ 2997 and libraries\n"), stdout); 2998 fputs (_(" -B <directory> Add <directory> to the compiler's search paths\n"), stdout); 2999 fputs (_(" -v Display the programs invoked by the compiler\n"), stdout); 3000 fputs (_(" -### Like -v but options quoted and commands not executed\n"), stdout); 3001 fputs (_(" -E Preprocess only; do not compile, assemble or link\n"), stdout); 3002 fputs (_(" -S Compile only; do not assemble or link\n"), stdout); 3003 fputs (_(" -c Compile and assemble, but do not link\n"), stdout); 3004 fputs (_(" -o <file> Place the output into <file>\n"), stdout); 3005 fputs (_(" -pie Create a position independent executable\n"), stdout); 3006 fputs (_(" -shared Create a shared library\n"), stdout); 3007 fputs (_("\ 3008 -x <language> Specify the language of the following input files\n\ 3009 Permissible languages include: c c++ assembler none\n\ 3010 'none' means revert to the default behavior of\n\ 3011 guessing the language based on the file's extension\n\ 3012 "), stdout); 3013 3014 printf (_("\ 3015 \nOptions starting with -g, -f, -m, -O, -W, or --param are automatically\n\ 3016 passed on to the various sub-processes invoked by %s. In order to pass\n\ 3017 other options on to these processes the -W<letter> options must be used.\n\ 3018 "), progname); 3019 3020 /* The rest of the options are displayed by invocations of the various 3021 sub-processes. */ 3022 } 3023 3024 static void 3025 add_preprocessor_option (const char *option, int len) 3026 { 3027 VEC_safe_push (char_p, heap, preprocessor_options, 3028 save_string (option, len)); 3029 } 3030 3031 static void 3032 add_assembler_option (const char *option, int len) 3033 { 3034 VEC_safe_push (char_p, heap, assembler_options, save_string (option, len)); 3035 } 3036 3037 static void 3038 add_linker_option (const char *option, int len) 3039 { 3040 VEC_safe_push (char_p, heap, linker_options, save_string (option, len)); 3041 } 3042 3043 /* Allocate space for an input file in infiles. */ 3044 3045 static void 3046 alloc_infile (void) 3047 { 3048 if (n_infiles_alloc == 0) 3049 { 3050 n_infiles_alloc = 16; 3051 infiles = XNEWVEC (struct infile, n_infiles_alloc); 3052 } 3053 else if (n_infiles_alloc == n_infiles) 3054 { 3055 n_infiles_alloc *= 2; 3056 infiles = XRESIZEVEC (struct infile, infiles, n_infiles_alloc); 3057 } 3058 } 3059 3060 /* Store an input file with the given NAME and LANGUAGE in 3061 infiles. */ 3062 3063 static void 3064 add_infile (const char *name, const char *language) 3065 { 3066 alloc_infile (); 3067 infiles[n_infiles].name = name; 3068 infiles[n_infiles++].language = language; 3069 } 3070 3071 /* Allocate space for a switch in switches. */ 3072 3073 static void 3074 alloc_switch (void) 3075 { 3076 if (n_switches_alloc == 0) 3077 { 3078 n_switches_alloc = 16; 3079 switches = XNEWVEC (struct switchstr, n_switches_alloc); 3080 } 3081 else if (n_switches_alloc == n_switches) 3082 { 3083 n_switches_alloc *= 2; 3084 switches = XRESIZEVEC (struct switchstr, switches, n_switches_alloc); 3085 } 3086 } 3087 3088 /* Save an option OPT with N_ARGS arguments in array ARGS, marking it 3089 as validated if VALIDATED. */ 3090 3091 static void 3092 save_switch (const char *opt, size_t n_args, const char *const *args, 3093 bool validated) 3094 { 3095 alloc_switch (); 3096 switches[n_switches].part1 = opt + 1; 3097 if (n_args == 0) 3098 switches[n_switches].args = 0; 3099 else 3100 { 3101 switches[n_switches].args = XNEWVEC (const char *, n_args + 1); 3102 memcpy (switches[n_switches].args, args, n_args * sizeof (const char *)); 3103 switches[n_switches].args[n_args] = NULL; 3104 } 3105 3106 switches[n_switches].live_cond = 0; 3107 switches[n_switches].validated = validated; 3108 switches[n_switches].ordering = 0; 3109 n_switches++; 3110 } 3111 3112 /* Handle an option DECODED that is unknown to the option-processing 3113 machinery. */ 3114 3115 static bool 3116 driver_unknown_option_callback (const struct cl_decoded_option *decoded) 3117 { 3118 const char *opt = decoded->arg; 3119 if (opt[1] == 'W' && opt[2] == 'n' && opt[3] == 'o' && opt[4] == '-' 3120 && !(decoded->errors & CL_ERR_NEGATIVE)) 3121 { 3122 /* Leave unknown -Wno-* options for the compiler proper, to be 3123 diagnosed only if there are warnings. */ 3124 save_switch (decoded->canonical_option[0], 3125 decoded->canonical_option_num_elements - 1, 3126 &decoded->canonical_option[1], false); 3127 return false; 3128 } 3129 else 3130 return true; 3131 } 3132 3133 /* Handle an option DECODED that is not marked as CL_DRIVER. 3134 LANG_MASK will always be CL_DRIVER. */ 3135 3136 static void 3137 driver_wrong_lang_callback (const struct cl_decoded_option *decoded, 3138 unsigned int lang_mask ATTRIBUTE_UNUSED) 3139 { 3140 /* At this point, non-driver options are accepted (and expected to 3141 be passed down by specs) unless marked to be rejected by the 3142 driver. Options to be rejected by the driver but accepted by the 3143 compilers proper are treated just like completely unknown 3144 options. */ 3145 const struct cl_option *option = &cl_options[decoded->opt_index]; 3146 3147 if (option->cl_reject_driver) 3148 error ("unrecognized command line option %qs", 3149 decoded->orig_option_with_args_text); 3150 else 3151 save_switch (decoded->canonical_option[0], 3152 decoded->canonical_option_num_elements - 1, 3153 &decoded->canonical_option[1], false); 3154 } 3155 3156 static const char *spec_lang = 0; 3157 static int last_language_n_infiles; 3158 3159 /* Handle a driver option; arguments and return value as for 3160 handle_option. */ 3161 3162 static bool 3163 driver_handle_option (struct gcc_options *opts, 3164 struct gcc_options *opts_set, 3165 const struct cl_decoded_option *decoded, 3166 unsigned int lang_mask ATTRIBUTE_UNUSED, int kind, 3167 location_t loc, 3168 const struct cl_option_handlers *handlers ATTRIBUTE_UNUSED, 3169 diagnostic_context *dc) 3170 { 3171 size_t opt_index = decoded->opt_index; 3172 const char *arg = decoded->arg; 3173 const char *compare_debug_replacement_opt; 3174 int value = decoded->value; 3175 bool validated = false; 3176 bool do_save = true; 3177 3178 gcc_assert (opts == &global_options); 3179 gcc_assert (opts_set == &global_options_set); 3180 gcc_assert (kind == DK_UNSPECIFIED); 3181 gcc_assert (loc == UNKNOWN_LOCATION); 3182 gcc_assert (dc == global_dc); 3183 3184 switch (opt_index) 3185 { 3186 case OPT_dumpspecs: 3187 { 3188 struct spec_list *sl; 3189 init_spec (); 3190 for (sl = specs; sl; sl = sl->next) 3191 printf ("*%s:\n%s\n\n", sl->name, *(sl->ptr_spec)); 3192 if (link_command_spec) 3193 printf ("*link_command:\n%s\n\n", link_command_spec); 3194 exit (0); 3195 } 3196 3197 case OPT_dumpversion: 3198 printf ("%s\n", spec_version); 3199 exit (0); 3200 3201 case OPT_dumpmachine: 3202 printf ("%s\n", spec_machine); 3203 exit (0); 3204 3205 case OPT__version: 3206 print_version = 1; 3207 3208 /* CPP driver cannot obtain switch from cc1_options. */ 3209 if (is_cpp_driver) 3210 add_preprocessor_option ("--version", strlen ("--version")); 3211 add_assembler_option ("--version", strlen ("--version")); 3212 add_linker_option ("--version", strlen ("--version")); 3213 break; 3214 3215 case OPT__help: 3216 print_help_list = 1; 3217 3218 /* CPP driver cannot obtain switch from cc1_options. */ 3219 if (is_cpp_driver) 3220 add_preprocessor_option ("--help", 6); 3221 add_assembler_option ("--help", 6); 3222 add_linker_option ("--help", 6); 3223 break; 3224 3225 case OPT__help_: 3226 print_subprocess_help = 2; 3227 break; 3228 3229 case OPT__target_help: 3230 print_subprocess_help = 1; 3231 3232 /* CPP driver cannot obtain switch from cc1_options. */ 3233 if (is_cpp_driver) 3234 add_preprocessor_option ("--target-help", 13); 3235 add_assembler_option ("--target-help", 13); 3236 add_linker_option ("--target-help", 13); 3237 break; 3238 3239 case OPT_pass_exit_codes: 3240 case OPT_print_search_dirs: 3241 case OPT_print_file_name_: 3242 case OPT_print_prog_name_: 3243 case OPT_print_multi_lib: 3244 case OPT_print_multi_directory: 3245 case OPT_print_sysroot: 3246 case OPT_print_multi_os_directory: 3247 case OPT_print_sysroot_headers_suffix: 3248 case OPT_time: 3249 case OPT_wrapper: 3250 /* These options set the variables specified in common.opt 3251 automatically, and do not need to be saved for spec 3252 processing. */ 3253 do_save = false; 3254 break; 3255 3256 case OPT_print_libgcc_file_name: 3257 print_file_name = "libgcc.a"; 3258 do_save = false; 3259 break; 3260 3261 case OPT_fcompare_debug_second: 3262 compare_debug_second = 1; 3263 break; 3264 3265 case OPT_fcompare_debug: 3266 switch (value) 3267 { 3268 case 0: 3269 compare_debug_replacement_opt = "-fcompare-debug="; 3270 arg = ""; 3271 goto compare_debug_with_arg; 3272 3273 case 1: 3274 compare_debug_replacement_opt = "-fcompare-debug=-gtoggle"; 3275 arg = "-gtoggle"; 3276 goto compare_debug_with_arg; 3277 3278 default: 3279 gcc_unreachable (); 3280 } 3281 break; 3282 3283 case OPT_fcompare_debug_: 3284 compare_debug_replacement_opt = decoded->canonical_option[0]; 3285 compare_debug_with_arg: 3286 gcc_assert (decoded->canonical_option_num_elements == 1); 3287 gcc_assert (arg != NULL); 3288 if (*arg) 3289 compare_debug = 1; 3290 else 3291 compare_debug = -1; 3292 if (compare_debug < 0) 3293 compare_debug_opt = NULL; 3294 else 3295 compare_debug_opt = arg; 3296 save_switch (compare_debug_replacement_opt, 0, NULL, validated); 3297 return true; 3298 3299 case OPT_Wa_: 3300 { 3301 int prev, j; 3302 /* Pass the rest of this option to the assembler. */ 3303 3304 /* Split the argument at commas. */ 3305 prev = 0; 3306 for (j = 0; arg[j]; j++) 3307 if (arg[j] == ',') 3308 { 3309 add_assembler_option (arg + prev, j - prev); 3310 prev = j + 1; 3311 } 3312 3313 /* Record the part after the last comma. */ 3314 add_assembler_option (arg + prev, j - prev); 3315 } 3316 do_save = false; 3317 break; 3318 3319 case OPT_Wp_: 3320 { 3321 int prev, j; 3322 /* Pass the rest of this option to the preprocessor. */ 3323 3324 /* Split the argument at commas. */ 3325 prev = 0; 3326 for (j = 0; arg[j]; j++) 3327 if (arg[j] == ',') 3328 { 3329 add_preprocessor_option (arg + prev, j - prev); 3330 prev = j + 1; 3331 } 3332 3333 /* Record the part after the last comma. */ 3334 add_preprocessor_option (arg + prev, j - prev); 3335 } 3336 do_save = false; 3337 break; 3338 3339 case OPT_Wl_: 3340 { 3341 int prev, j; 3342 /* Split the argument at commas. */ 3343 prev = 0; 3344 for (j = 0; arg[j]; j++) 3345 if (arg[j] == ',') 3346 { 3347 add_infile (save_string (arg + prev, j - prev), "*"); 3348 prev = j + 1; 3349 } 3350 /* Record the part after the last comma. */ 3351 add_infile (arg + prev, "*"); 3352 } 3353 do_save = false; 3354 break; 3355 3356 case OPT_Xlinker: 3357 add_infile (arg, "*"); 3358 do_save = false; 3359 break; 3360 3361 case OPT_Xpreprocessor: 3362 add_preprocessor_option (arg, strlen (arg)); 3363 do_save = false; 3364 break; 3365 3366 case OPT_Xassembler: 3367 add_assembler_option (arg, strlen (arg)); 3368 do_save = false; 3369 break; 3370 3371 case OPT_l: 3372 /* POSIX allows separation of -l and the lib arg; canonicalize 3373 by concatenating -l with its arg */ 3374 add_infile (concat ("-l", arg, NULL), "*"); 3375 do_save = false; 3376 break; 3377 3378 case OPT_L: 3379 /* Similarly, canonicalize -L for linkers that may not accept 3380 separate arguments. */ 3381 save_switch (concat ("-L", arg, NULL), 0, NULL, validated); 3382 return true; 3383 3384 case OPT_F: 3385 /* Likewise -F. */ 3386 save_switch (concat ("-F", arg, NULL), 0, NULL, validated); 3387 return true; 3388 3389 case OPT_save_temps: 3390 save_temps_flag = SAVE_TEMPS_CWD; 3391 validated = true; 3392 break; 3393 3394 case OPT_save_temps_: 3395 if (strcmp (arg, "cwd") == 0) 3396 save_temps_flag = SAVE_TEMPS_CWD; 3397 else if (strcmp (arg, "obj") == 0 3398 || strcmp (arg, "object") == 0) 3399 save_temps_flag = SAVE_TEMPS_OBJ; 3400 else 3401 fatal_error ("%qs is an unknown -save-temps option", 3402 decoded->orig_option_with_args_text); 3403 break; 3404 3405 case OPT_no_canonical_prefixes: 3406 /* Already handled as a special case, so ignored here. */ 3407 do_save = false; 3408 break; 3409 3410 case OPT_pipe: 3411 validated = true; 3412 /* These options set the variables specified in common.opt 3413 automatically, but do need to be saved for spec 3414 processing. */ 3415 break; 3416 3417 case OPT_specs_: 3418 { 3419 struct user_specs *user = XNEW (struct user_specs); 3420 3421 user->next = (struct user_specs *) 0; 3422 user->filename = arg; 3423 if (user_specs_tail) 3424 user_specs_tail->next = user; 3425 else 3426 user_specs_head = user; 3427 user_specs_tail = user; 3428 } 3429 do_save = false; 3430 break; 3431 3432 case OPT__sysroot_: 3433 target_system_root = arg; 3434 target_system_root_changed = 1; 3435 do_save = false; 3436 break; 3437 3438 case OPT_time_: 3439 if (report_times_to_file) 3440 fclose (report_times_to_file); 3441 report_times_to_file = fopen (arg, "a"); 3442 do_save = false; 3443 break; 3444 3445 case OPT____: 3446 /* "-###" 3447 This is similar to -v except that there is no execution 3448 of the commands and the echoed arguments are quoted. It 3449 is intended for use in shell scripts to capture the 3450 driver-generated command line. */ 3451 verbose_only_flag++; 3452 verbose_flag = 1; 3453 do_save = false; 3454 break; 3455 3456 case OPT_B: 3457 { 3458 size_t len = strlen (arg); 3459 3460 /* Catch the case where the user has forgotten to append a 3461 directory separator to the path. Note, they may be using 3462 -B to add an executable name prefix, eg "i386-elf-", in 3463 order to distinguish between multiple installations of 3464 GCC in the same directory. Hence we must check to see 3465 if appending a directory separator actually makes a 3466 valid directory name. */ 3467 if (!IS_DIR_SEPARATOR (arg[len - 1]) 3468 && is_directory (arg, false)) 3469 { 3470 char *tmp = XNEWVEC (char, len + 2); 3471 strcpy (tmp, arg); 3472 tmp[len] = DIR_SEPARATOR; 3473 tmp[++len] = 0; 3474 arg = tmp; 3475 } 3476 3477 add_prefix (&exec_prefixes, arg, NULL, 3478 PREFIX_PRIORITY_B_OPT, 0, 0); 3479 add_prefix (&startfile_prefixes, arg, NULL, 3480 PREFIX_PRIORITY_B_OPT, 0, 0); 3481 add_prefix (&include_prefixes, arg, NULL, 3482 PREFIX_PRIORITY_B_OPT, 0, 0); 3483 } 3484 validated = true; 3485 break; 3486 3487 case OPT_x: 3488 spec_lang = arg; 3489 if (!strcmp (spec_lang, "none")) 3490 /* Suppress the warning if -xnone comes after the last input 3491 file, because alternate command interfaces like g++ might 3492 find it useful to place -xnone after each input file. */ 3493 spec_lang = 0; 3494 else 3495 last_language_n_infiles = n_infiles; 3496 do_save = false; 3497 break; 3498 3499 case OPT_o: 3500 have_o = 1; 3501 #if defined(HAVE_TARGET_EXECUTABLE_SUFFIX) || defined(HAVE_TARGET_OBJECT_SUFFIX) 3502 arg = convert_filename (arg, ! have_c, 0); 3503 #endif 3504 /* Save the output name in case -save-temps=obj was used. */ 3505 save_temps_prefix = xstrdup (arg); 3506 /* On some systems, ld cannot handle "-o" without a space. So 3507 split the option from its argument. */ 3508 save_switch ("-o", 1, &arg, validated); 3509 return true; 3510 3511 case OPT_static_libgcc: 3512 case OPT_shared_libgcc: 3513 case OPT_static_libgfortran: 3514 case OPT_static_libstdc__: 3515 /* These are always valid, since gcc.c itself understands the 3516 first two, gfortranspec.c understands -static-libgfortran and 3517 g++spec.c understands -static-libstdc++ */ 3518 validated = true; 3519 break; 3520 3521 default: 3522 /* Various driver options need no special processing at this 3523 point, having been handled in a prescan above or being 3524 handled by specs. */ 3525 break; 3526 } 3527 3528 if (do_save) 3529 save_switch (decoded->canonical_option[0], 3530 decoded->canonical_option_num_elements - 1, 3531 &decoded->canonical_option[1], validated); 3532 return true; 3533 } 3534 3535 /* Put the driver's standard set of option handlers in *HANDLERS. */ 3536 3537 static void 3538 set_option_handlers (struct cl_option_handlers *handlers) 3539 { 3540 handlers->unknown_option_callback = driver_unknown_option_callback; 3541 handlers->wrong_lang_callback = driver_wrong_lang_callback; 3542 handlers->num_handlers = 3; 3543 handlers->handlers[0].handler = driver_handle_option; 3544 handlers->handlers[0].mask = CL_DRIVER; 3545 handlers->handlers[1].handler = common_handle_option; 3546 handlers->handlers[1].mask = CL_COMMON; 3547 handlers->handlers[2].handler = target_handle_option; 3548 handlers->handlers[2].mask = CL_TARGET; 3549 } 3550 3551 /* Create the vector `switches' and its contents. 3552 Store its length in `n_switches'. */ 3553 3554 static void 3555 process_command (unsigned int decoded_options_count, 3556 struct cl_decoded_option *decoded_options) 3557 { 3558 const char *temp; 3559 char *temp1; 3560 const char *tooldir_prefix; 3561 char *(*get_relative_prefix) (const char *, const char *, 3562 const char *) = NULL; 3563 struct cl_option_handlers handlers; 3564 unsigned int j; 3565 3566 gcc_exec_prefix = getenv ("GCC_EXEC_PREFIX"); 3567 3568 n_switches = 0; 3569 n_infiles = 0; 3570 added_libraries = 0; 3571 3572 /* Figure compiler version from version string. */ 3573 3574 compiler_version = temp1 = xstrdup (version_string); 3575 3576 for (; *temp1; ++temp1) 3577 { 3578 if (*temp1 == ' ') 3579 { 3580 *temp1 = '\0'; 3581 break; 3582 } 3583 } 3584 3585 /* Handle any -no-canonical-prefixes flag early, to assign the function 3586 that builds relative prefixes. This function creates default search 3587 paths that are needed later in normal option handling. */ 3588 3589 for (j = 1; j < decoded_options_count; j++) 3590 { 3591 if (decoded_options[j].opt_index == OPT_no_canonical_prefixes) 3592 { 3593 get_relative_prefix = make_relative_prefix_ignore_links; 3594 break; 3595 } 3596 } 3597 if (! get_relative_prefix) 3598 get_relative_prefix = make_relative_prefix; 3599 3600 /* Set up the default search paths. If there is no GCC_EXEC_PREFIX, 3601 see if we can create it from the pathname specified in 3602 decoded_options[0].arg. */ 3603 3604 gcc_libexec_prefix = standard_libexec_prefix; 3605 #ifndef VMS 3606 /* FIXME: make_relative_prefix doesn't yet work for VMS. */ 3607 if (!gcc_exec_prefix) 3608 { 3609 gcc_exec_prefix = get_relative_prefix (decoded_options[0].arg, 3610 standard_bindir_prefix, 3611 standard_exec_prefix); 3612 gcc_libexec_prefix = get_relative_prefix (decoded_options[0].arg, 3613 standard_bindir_prefix, 3614 standard_libexec_prefix); 3615 if (gcc_exec_prefix) 3616 xputenv (concat ("GCC_EXEC_PREFIX=", gcc_exec_prefix, NULL)); 3617 } 3618 else 3619 { 3620 /* make_relative_prefix requires a program name, but 3621 GCC_EXEC_PREFIX is typically a directory name with a trailing 3622 / (which is ignored by make_relative_prefix), so append a 3623 program name. */ 3624 char *tmp_prefix = concat (gcc_exec_prefix, "gcc", NULL); 3625 gcc_libexec_prefix = get_relative_prefix (tmp_prefix, 3626 standard_exec_prefix, 3627 standard_libexec_prefix); 3628 3629 /* The path is unrelocated, so fallback to the original setting. */ 3630 if (!gcc_libexec_prefix) 3631 gcc_libexec_prefix = standard_libexec_prefix; 3632 3633 free (tmp_prefix); 3634 } 3635 #else 3636 #endif 3637 /* From this point onward, gcc_exec_prefix is non-null if the toolchain 3638 is relocated. The toolchain was either relocated using GCC_EXEC_PREFIX 3639 or an automatically created GCC_EXEC_PREFIX from 3640 decoded_options[0].arg. */ 3641 3642 /* Do language-specific adjustment/addition of flags. */ 3643 lang_specific_driver (&decoded_options, &decoded_options_count, 3644 &added_libraries); 3645 3646 if (gcc_exec_prefix) 3647 { 3648 int len = strlen (gcc_exec_prefix); 3649 3650 if (len > (int) sizeof ("/lib/gcc/") - 1 3651 && (IS_DIR_SEPARATOR (gcc_exec_prefix[len-1]))) 3652 { 3653 temp = gcc_exec_prefix + len - sizeof ("/lib/gcc/") + 1; 3654 if (IS_DIR_SEPARATOR (*temp) 3655 && filename_ncmp (temp + 1, "lib", 3) == 0 3656 && IS_DIR_SEPARATOR (temp[4]) 3657 && filename_ncmp (temp + 5, "gcc", 3) == 0) 3658 len -= sizeof ("/lib/gcc/") - 1; 3659 } 3660 3661 set_std_prefix (gcc_exec_prefix, len); 3662 add_prefix (&exec_prefixes, gcc_libexec_prefix, "GCC", 3663 PREFIX_PRIORITY_LAST, 0, 0); 3664 add_prefix (&startfile_prefixes, gcc_exec_prefix, "GCC", 3665 PREFIX_PRIORITY_LAST, 0, 0); 3666 } 3667 3668 /* COMPILER_PATH and LIBRARY_PATH have values 3669 that are lists of directory names with colons. */ 3670 3671 temp = getenv ("COMPILER_PATH"); 3672 if (temp) 3673 { 3674 const char *startp, *endp; 3675 char *nstore = (char *) alloca (strlen (temp) + 3); 3676 3677 startp = endp = temp; 3678 while (1) 3679 { 3680 if (*endp == PATH_SEPARATOR || *endp == 0) 3681 { 3682 strncpy (nstore, startp, endp - startp); 3683 if (endp == startp) 3684 strcpy (nstore, concat (".", dir_separator_str, NULL)); 3685 else if (!IS_DIR_SEPARATOR (endp[-1])) 3686 { 3687 nstore[endp - startp] = DIR_SEPARATOR; 3688 nstore[endp - startp + 1] = 0; 3689 } 3690 else 3691 nstore[endp - startp] = 0; 3692 add_prefix (&exec_prefixes, nstore, 0, 3693 PREFIX_PRIORITY_LAST, 0, 0); 3694 add_prefix (&include_prefixes, nstore, 0, 3695 PREFIX_PRIORITY_LAST, 0, 0); 3696 if (*endp == 0) 3697 break; 3698 endp = startp = endp + 1; 3699 } 3700 else 3701 endp++; 3702 } 3703 } 3704 3705 temp = getenv (LIBRARY_PATH_ENV); 3706 if (temp && *cross_compile == '0') 3707 { 3708 const char *startp, *endp; 3709 char *nstore = (char *) alloca (strlen (temp) + 3); 3710 3711 startp = endp = temp; 3712 while (1) 3713 { 3714 if (*endp == PATH_SEPARATOR || *endp == 0) 3715 { 3716 strncpy (nstore, startp, endp - startp); 3717 if (endp == startp) 3718 strcpy (nstore, concat (".", dir_separator_str, NULL)); 3719 else if (!IS_DIR_SEPARATOR (endp[-1])) 3720 { 3721 nstore[endp - startp] = DIR_SEPARATOR; 3722 nstore[endp - startp + 1] = 0; 3723 } 3724 else 3725 nstore[endp - startp] = 0; 3726 add_prefix (&startfile_prefixes, nstore, NULL, 3727 PREFIX_PRIORITY_LAST, 0, 1); 3728 if (*endp == 0) 3729 break; 3730 endp = startp = endp + 1; 3731 } 3732 else 3733 endp++; 3734 } 3735 } 3736 3737 /* Use LPATH like LIBRARY_PATH (for the CMU build program). */ 3738 temp = getenv ("LPATH"); 3739 if (temp && *cross_compile == '0') 3740 { 3741 const char *startp, *endp; 3742 char *nstore = (char *) alloca (strlen (temp) + 3); 3743 3744 startp = endp = temp; 3745 while (1) 3746 { 3747 if (*endp == PATH_SEPARATOR || *endp == 0) 3748 { 3749 strncpy (nstore, startp, endp - startp); 3750 if (endp == startp) 3751 strcpy (nstore, concat (".", dir_separator_str, NULL)); 3752 else if (!IS_DIR_SEPARATOR (endp[-1])) 3753 { 3754 nstore[endp - startp] = DIR_SEPARATOR; 3755 nstore[endp - startp + 1] = 0; 3756 } 3757 else 3758 nstore[endp - startp] = 0; 3759 add_prefix (&startfile_prefixes, nstore, NULL, 3760 PREFIX_PRIORITY_LAST, 0, 1); 3761 if (*endp == 0) 3762 break; 3763 endp = startp = endp + 1; 3764 } 3765 else 3766 endp++; 3767 } 3768 } 3769 3770 /* Process the options and store input files and switches in their 3771 vectors. */ 3772 3773 last_language_n_infiles = -1; 3774 3775 set_option_handlers (&handlers); 3776 3777 for (j = 1; j < decoded_options_count; j++) 3778 { 3779 switch (decoded_options[j].opt_index) 3780 { 3781 case OPT_S: 3782 case OPT_c: 3783 case OPT_E: 3784 have_c = 1; 3785 break; 3786 } 3787 if (have_c) 3788 break; 3789 } 3790 3791 for (j = 1; j < decoded_options_count; j++) 3792 { 3793 if (decoded_options[j].opt_index == OPT_SPECIAL_input_file) 3794 { 3795 const char *arg = decoded_options[j].arg; 3796 const char *p = strrchr (arg, '@'); 3797 char *fname; 3798 long offset; 3799 int consumed; 3800 #ifdef HAVE_TARGET_OBJECT_SUFFIX 3801 arg = convert_filename (arg, 0, access (arg, F_OK)); 3802 #endif 3803 /* For LTO static archive support we handle input file 3804 specifications that are composed of a filename and 3805 an offset like FNAME@OFFSET. */ 3806 if (p 3807 && p != arg 3808 && sscanf (p, "@%li%n", &offset, &consumed) >= 1 3809 && strlen (p) == (unsigned int)consumed) 3810 { 3811 fname = (char *)xmalloc (p - arg + 1); 3812 memcpy (fname, arg, p - arg); 3813 fname[p - arg] = '\0'; 3814 /* Only accept non-stdin and existing FNAME parts, otherwise 3815 try with the full name. */ 3816 if (strcmp (fname, "-") == 0 || access (fname, F_OK) < 0) 3817 { 3818 free (fname); 3819 fname = xstrdup (arg); 3820 } 3821 } 3822 else 3823 fname = xstrdup (arg); 3824 3825 if (strcmp (fname, "-") != 0 && access (fname, F_OK) < 0) 3826 perror_with_name (fname); 3827 else 3828 add_infile (arg, spec_lang); 3829 3830 free (fname); 3831 continue; 3832 } 3833 3834 read_cmdline_option (&global_options, &global_options_set, 3835 decoded_options + j, UNKNOWN_LOCATION, 3836 CL_DRIVER, &handlers, global_dc); 3837 } 3838 3839 /* If -save-temps=obj and -o name, create the prefix to use for %b. 3840 Otherwise just make -save-temps=obj the same as -save-temps=cwd. */ 3841 if (save_temps_flag == SAVE_TEMPS_OBJ && save_temps_prefix != NULL) 3842 { 3843 save_temps_length = strlen (save_temps_prefix); 3844 temp = strrchr (lbasename (save_temps_prefix), '.'); 3845 if (temp) 3846 { 3847 save_temps_length -= strlen (temp); 3848 save_temps_prefix[save_temps_length] = '\0'; 3849 } 3850 3851 } 3852 else if (save_temps_prefix != NULL) 3853 { 3854 free (save_temps_prefix); 3855 save_temps_prefix = NULL; 3856 } 3857 3858 if (save_temps_flag && use_pipes) 3859 { 3860 /* -save-temps overrides -pipe, so that temp files are produced */ 3861 if (save_temps_flag) 3862 warning (0, "-pipe ignored because -save-temps specified"); 3863 use_pipes = 0; 3864 } 3865 3866 if (!compare_debug) 3867 { 3868 const char *gcd = getenv ("GCC_COMPARE_DEBUG"); 3869 3870 if (gcd && gcd[0] == '-') 3871 { 3872 compare_debug = 2; 3873 compare_debug_opt = gcd; 3874 } 3875 else if (gcd && *gcd && strcmp (gcd, "0")) 3876 { 3877 compare_debug = 3; 3878 compare_debug_opt = "-gtoggle"; 3879 } 3880 } 3881 else if (compare_debug < 0) 3882 { 3883 compare_debug = 0; 3884 gcc_assert (!compare_debug_opt); 3885 } 3886 3887 /* Set up the search paths. We add directories that we expect to 3888 contain GNU Toolchain components before directories specified by 3889 the machine description so that we will find GNU components (like 3890 the GNU assembler) before those of the host system. */ 3891 3892 /* If we don't know where the toolchain has been installed, use the 3893 configured-in locations. */ 3894 if (!gcc_exec_prefix) 3895 { 3896 #ifndef OS2 3897 add_prefix (&exec_prefixes, standard_libexec_prefix, "GCC", 3898 PREFIX_PRIORITY_LAST, 1, 0); 3899 add_prefix (&exec_prefixes, standard_libexec_prefix, "BINUTILS", 3900 PREFIX_PRIORITY_LAST, 2, 0); 3901 add_prefix (&exec_prefixes, standard_exec_prefix, "BINUTILS", 3902 PREFIX_PRIORITY_LAST, 2, 0); 3903 #endif 3904 add_prefix (&startfile_prefixes, standard_exec_prefix, "BINUTILS", 3905 PREFIX_PRIORITY_LAST, 1, 0); 3906 } 3907 3908 gcc_assert (!IS_ABSOLUTE_PATH (tooldir_base_prefix)); 3909 tooldir_prefix = concat (tooldir_base_prefix, spec_machine, 3910 dir_separator_str, NULL); 3911 3912 /* Look for tools relative to the location from which the driver is 3913 running, or, if that is not available, the configured prefix. */ 3914 tooldir_prefix 3915 = concat (gcc_exec_prefix ? gcc_exec_prefix : standard_exec_prefix, 3916 spec_machine, dir_separator_str, 3917 spec_version, dir_separator_str, tooldir_prefix, NULL); 3918 3919 add_prefix (&exec_prefixes, 3920 concat (tooldir_prefix, "bin", dir_separator_str, NULL), 3921 "BINUTILS", PREFIX_PRIORITY_LAST, 0, 0); 3922 add_prefix (&startfile_prefixes, 3923 concat (tooldir_prefix, "lib", dir_separator_str, NULL), 3924 "BINUTILS", PREFIX_PRIORITY_LAST, 0, 1); 3925 3926 #if defined(TARGET_SYSTEM_ROOT_RELOCATABLE) && !defined(VMS) 3927 /* If the normal TARGET_SYSTEM_ROOT is inside of $exec_prefix, 3928 then consider it to relocate with the rest of the GCC installation 3929 if GCC_EXEC_PREFIX is set. 3930 ``make_relative_prefix'' is not compiled for VMS, so don't call it. */ 3931 if (target_system_root && !target_system_root_changed && gcc_exec_prefix) 3932 { 3933 char *tmp_prefix = get_relative_prefix (decoded_options[0].arg, 3934 standard_bindir_prefix, 3935 target_system_root); 3936 if (tmp_prefix && access_check (tmp_prefix, F_OK) == 0) 3937 { 3938 target_system_root = tmp_prefix; 3939 target_system_root_changed = 1; 3940 } 3941 } 3942 #endif 3943 3944 /* More prefixes are enabled in main, after we read the specs file 3945 and determine whether this is cross-compilation or not. */ 3946 3947 if (n_infiles == last_language_n_infiles && spec_lang != 0) 3948 warning (0, "%<-x %s%> after last input file has no effect", spec_lang); 3949 3950 if (compare_debug == 2 || compare_debug == 3) 3951 { 3952 alloc_switch (); 3953 switches[n_switches].part1 = concat ("fcompare-debug=", 3954 compare_debug_opt, 3955 NULL); 3956 switches[n_switches].args = 0; 3957 switches[n_switches].live_cond = 0; 3958 switches[n_switches].validated = 0; 3959 switches[n_switches].ordering = 0; 3960 n_switches++; 3961 compare_debug = 1; 3962 } 3963 3964 /* Ensure we only invoke each subprocess once. */ 3965 if (print_subprocess_help || print_help_list || print_version) 3966 { 3967 n_infiles = 0; 3968 3969 /* Create a dummy input file, so that we can pass 3970 the help option on to the various sub-processes. */ 3971 add_infile ("help-dummy", "c"); 3972 } 3973 3974 alloc_switch (); 3975 switches[n_switches].part1 = 0; 3976 alloc_infile (); 3977 infiles[n_infiles].name = 0; 3978 } 3979 3980 /* Store switches not filtered out by %<S in spec in COLLECT_GCC_OPTIONS 3981 and place that in the environment. */ 3982 3983 static void 3984 set_collect_gcc_options (void) 3985 { 3986 int i; 3987 int first_time; 3988 3989 /* Build COLLECT_GCC_OPTIONS to have all of the options specified to 3990 the compiler. */ 3991 obstack_grow (&collect_obstack, "COLLECT_GCC_OPTIONS=", 3992 sizeof ("COLLECT_GCC_OPTIONS=") - 1); 3993 3994 first_time = TRUE; 3995 for (i = 0; (int) i < n_switches; i++) 3996 { 3997 const char *const *args; 3998 const char *p, *q; 3999 if (!first_time) 4000 obstack_grow (&collect_obstack, " ", 1); 4001 4002 first_time = FALSE; 4003 4004 /* Ignore elided switches. */ 4005 if ((switches[i].live_cond 4006 & (SWITCH_IGNORE | SWITCH_KEEP_FOR_GCC)) 4007 == SWITCH_IGNORE) 4008 continue; 4009 4010 obstack_grow (&collect_obstack, "'-", 2); 4011 q = switches[i].part1; 4012 while ((p = strchr (q, '\''))) 4013 { 4014 obstack_grow (&collect_obstack, q, p - q); 4015 obstack_grow (&collect_obstack, "'\\''", 4); 4016 q = ++p; 4017 } 4018 obstack_grow (&collect_obstack, q, strlen (q)); 4019 obstack_grow (&collect_obstack, "'", 1); 4020 4021 for (args = switches[i].args; args && *args; args++) 4022 { 4023 obstack_grow (&collect_obstack, " '", 2); 4024 q = *args; 4025 while ((p = strchr (q, '\''))) 4026 { 4027 obstack_grow (&collect_obstack, q, p - q); 4028 obstack_grow (&collect_obstack, "'\\''", 4); 4029 q = ++p; 4030 } 4031 obstack_grow (&collect_obstack, q, strlen (q)); 4032 obstack_grow (&collect_obstack, "'", 1); 4033 } 4034 } 4035 obstack_grow (&collect_obstack, "\0", 1); 4036 xputenv (XOBFINISH (&collect_obstack, char *)); 4037 } 4038 4039 /* Process a spec string, accumulating and running commands. */ 4040 4041 /* These variables describe the input file name. 4042 input_file_number is the index on outfiles of this file, 4043 so that the output file name can be stored for later use by %o. 4044 input_basename is the start of the part of the input file 4045 sans all directory names, and basename_length is the number 4046 of characters starting there excluding the suffix .c or whatever. */ 4047 4048 static const char *gcc_input_filename; 4049 static int input_file_number; 4050 size_t input_filename_length; 4051 static int basename_length; 4052 static int suffixed_basename_length; 4053 static const char *input_basename; 4054 static const char *input_suffix; 4055 #ifndef HOST_LACKS_INODE_NUMBERS 4056 static struct stat input_stat; 4057 #endif 4058 static int input_stat_set; 4059 4060 /* The compiler used to process the current input file. */ 4061 static struct compiler *input_file_compiler; 4062 4063 /* These are variables used within do_spec and do_spec_1. */ 4064 4065 /* Nonzero if an arg has been started and not yet terminated 4066 (with space, tab or newline). */ 4067 static int arg_going; 4068 4069 /* Nonzero means %d or %g has been seen; the next arg to be terminated 4070 is a temporary file name. */ 4071 static int delete_this_arg; 4072 4073 /* Nonzero means %w has been seen; the next arg to be terminated 4074 is the output file name of this compilation. */ 4075 static int this_is_output_file; 4076 4077 /* Nonzero means %s has been seen; the next arg to be terminated 4078 is the name of a library file and we should try the standard 4079 search dirs for it. */ 4080 static int this_is_library_file; 4081 4082 /* Nonzero means %T has been seen; the next arg to be terminated 4083 is the name of a linker script and we should try all of the 4084 standard search dirs for it. If it is found insert a --script 4085 command line switch and then substitute the full path in place, 4086 otherwise generate an error message. */ 4087 static int this_is_linker_script; 4088 4089 /* Nonzero means that the input of this command is coming from a pipe. */ 4090 static int input_from_pipe; 4091 4092 /* Nonnull means substitute this for any suffix when outputting a switches 4093 arguments. */ 4094 static const char *suffix_subst; 4095 4096 /* If there is an argument being accumulated, terminate it and store it. */ 4097 4098 static void 4099 end_going_arg (void) 4100 { 4101 if (arg_going) 4102 { 4103 const char *string; 4104 4105 obstack_1grow (&obstack, 0); 4106 string = XOBFINISH (&obstack, const char *); 4107 if (this_is_library_file) 4108 string = find_file (string); 4109 if (this_is_linker_script) 4110 { 4111 char * full_script_path = find_a_file (&startfile_prefixes, string, R_OK, true); 4112 4113 if (full_script_path == NULL) 4114 { 4115 error ("unable to locate default linker script %qs in the library search paths", string); 4116 /* Script was not found on search path. */ 4117 return; 4118 } 4119 store_arg ("--script", false, false); 4120 string = full_script_path; 4121 } 4122 store_arg (string, delete_this_arg, this_is_output_file); 4123 if (this_is_output_file) 4124 outfiles[input_file_number] = string; 4125 arg_going = 0; 4126 } 4127 } 4128 4129 4130 /* Parse the WRAPPER string which is a comma separated list of the command line 4131 and insert them into the beginning of argbuf. */ 4132 4133 static void 4134 insert_wrapper (const char *wrapper) 4135 { 4136 int n = 0; 4137 int i; 4138 char *buf = xstrdup (wrapper); 4139 char *p = buf; 4140 unsigned int old_length = VEC_length (const_char_p, argbuf); 4141 4142 do 4143 { 4144 n++; 4145 while (*p == ',') 4146 p++; 4147 } 4148 while ((p = strchr (p, ',')) != NULL); 4149 4150 VEC_safe_grow (const_char_p, heap, argbuf, old_length + n); 4151 memmove (VEC_address (const_char_p, argbuf) + n, 4152 VEC_address (const_char_p, argbuf), 4153 old_length * sizeof (const_char_p)); 4154 4155 i = 0; 4156 p = buf; 4157 do 4158 { 4159 while (*p == ',') 4160 { 4161 *p = 0; 4162 p++; 4163 } 4164 VEC_replace (const_char_p, argbuf, i, p); 4165 i++; 4166 } 4167 while ((p = strchr (p, ',')) != NULL); 4168 gcc_assert (i == n); 4169 } 4170 4171 /* Process the spec SPEC and run the commands specified therein. 4172 Returns 0 if the spec is successfully processed; -1 if failed. */ 4173 4174 int 4175 do_spec (const char *spec) 4176 { 4177 int value; 4178 4179 value = do_spec_2 (spec); 4180 4181 /* Force out any unfinished command. 4182 If -pipe, this forces out the last command if it ended in `|'. */ 4183 if (value == 0) 4184 { 4185 if (VEC_length (const_char_p, argbuf) > 0 4186 && !strcmp (VEC_last (const_char_p, argbuf), "|")) 4187 VEC_pop (const_char_p, argbuf); 4188 4189 set_collect_gcc_options (); 4190 4191 if (VEC_length (const_char_p, argbuf) > 0) 4192 value = execute (); 4193 } 4194 4195 return value; 4196 } 4197 4198 static int 4199 do_spec_2 (const char *spec) 4200 { 4201 int result; 4202 4203 clear_args (); 4204 arg_going = 0; 4205 delete_this_arg = 0; 4206 this_is_output_file = 0; 4207 this_is_library_file = 0; 4208 this_is_linker_script = 0; 4209 input_from_pipe = 0; 4210 suffix_subst = NULL; 4211 4212 result = do_spec_1 (spec, 0, NULL); 4213 4214 end_going_arg (); 4215 4216 return result; 4217 } 4218 4219 4220 /* Process the given spec string and add any new options to the end 4221 of the switches/n_switches array. */ 4222 4223 static void 4224 do_option_spec (const char *name, const char *spec) 4225 { 4226 unsigned int i, value_count, value_len; 4227 const char *p, *q, *value; 4228 char *tmp_spec, *tmp_spec_p; 4229 4230 if (configure_default_options[0].name == NULL) 4231 return; 4232 4233 for (i = 0; i < ARRAY_SIZE (configure_default_options); i++) 4234 if (strcmp (configure_default_options[i].name, name) == 0) 4235 break; 4236 if (i == ARRAY_SIZE (configure_default_options)) 4237 return; 4238 4239 value = configure_default_options[i].value; 4240 value_len = strlen (value); 4241 4242 /* Compute the size of the final spec. */ 4243 value_count = 0; 4244 p = spec; 4245 while ((p = strstr (p, "%(VALUE)")) != NULL) 4246 { 4247 p ++; 4248 value_count ++; 4249 } 4250 4251 /* Replace each %(VALUE) by the specified value. */ 4252 tmp_spec = (char *) alloca (strlen (spec) + 1 4253 + value_count * (value_len - strlen ("%(VALUE)"))); 4254 tmp_spec_p = tmp_spec; 4255 q = spec; 4256 while ((p = strstr (q, "%(VALUE)")) != NULL) 4257 { 4258 memcpy (tmp_spec_p, q, p - q); 4259 tmp_spec_p = tmp_spec_p + (p - q); 4260 memcpy (tmp_spec_p, value, value_len); 4261 tmp_spec_p += value_len; 4262 q = p + strlen ("%(VALUE)"); 4263 } 4264 strcpy (tmp_spec_p, q); 4265 4266 do_self_spec (tmp_spec); 4267 } 4268 4269 /* Process the given spec string and add any new options to the end 4270 of the switches/n_switches array. */ 4271 4272 static void 4273 do_self_spec (const char *spec) 4274 { 4275 int i; 4276 4277 do_spec_2 (spec); 4278 do_spec_1 (" ", 0, NULL); 4279 4280 /* Mark %<S switches processed by do_self_spec to be ignored permanently. 4281 do_self_specs adds the replacements to switches array, so it shouldn't 4282 be processed afterwards. */ 4283 for (i = 0; i < n_switches; i++) 4284 if ((switches[i].live_cond & SWITCH_IGNORE)) 4285 switches[i].live_cond |= SWITCH_IGNORE_PERMANENTLY; 4286 4287 if (VEC_length (const_char_p, argbuf) > 0) 4288 { 4289 const char **argbuf_copy; 4290 struct cl_decoded_option *decoded_options; 4291 struct cl_option_handlers handlers; 4292 unsigned int decoded_options_count; 4293 unsigned int j; 4294 4295 /* Create a copy of argbuf with a dummy argv[0] entry for 4296 decode_cmdline_options_to_array. */ 4297 argbuf_copy = XNEWVEC (const char *, 4298 VEC_length (const_char_p, argbuf) + 1); 4299 argbuf_copy[0] = ""; 4300 memcpy (argbuf_copy + 1, VEC_address (const_char_p, argbuf), 4301 VEC_length (const_char_p, argbuf) * sizeof (const char *)); 4302 4303 decode_cmdline_options_to_array (VEC_length (const_char_p, argbuf) + 1, 4304 argbuf_copy, 4305 CL_DRIVER, &decoded_options, 4306 &decoded_options_count); 4307 4308 set_option_handlers (&handlers); 4309 4310 for (j = 1; j < decoded_options_count; j++) 4311 { 4312 switch (decoded_options[j].opt_index) 4313 { 4314 case OPT_SPECIAL_input_file: 4315 /* Specs should only generate options, not input 4316 files. */ 4317 if (strcmp (decoded_options[j].arg, "-") != 0) 4318 fatal_error ("switch %qs does not start with %<-%>", 4319 decoded_options[j].arg); 4320 else 4321 fatal_error ("spec-generated switch is just %<-%>"); 4322 break; 4323 4324 case OPT_fcompare_debug_second: 4325 case OPT_fcompare_debug: 4326 case OPT_fcompare_debug_: 4327 case OPT_o: 4328 /* Avoid duplicate processing of some options from 4329 compare-debug specs; just save them here. */ 4330 save_switch (decoded_options[j].canonical_option[0], 4331 (decoded_options[j].canonical_option_num_elements 4332 - 1), 4333 &decoded_options[j].canonical_option[1], false); 4334 break; 4335 4336 default: 4337 read_cmdline_option (&global_options, &global_options_set, 4338 decoded_options + j, UNKNOWN_LOCATION, 4339 CL_DRIVER, &handlers, global_dc); 4340 break; 4341 } 4342 } 4343 4344 alloc_switch (); 4345 switches[n_switches].part1 = 0; 4346 } 4347 } 4348 4349 /* Callback for processing %D and %I specs. */ 4350 4351 struct spec_path_info { 4352 const char *option; 4353 const char *append; 4354 size_t append_len; 4355 bool omit_relative; 4356 bool separate_options; 4357 }; 4358 4359 static void * 4360 spec_path (char *path, void *data) 4361 { 4362 struct spec_path_info *info = (struct spec_path_info *) data; 4363 size_t len = 0; 4364 char save = 0; 4365 4366 if (info->omit_relative && !IS_ABSOLUTE_PATH (path)) 4367 return NULL; 4368 4369 if (info->append_len != 0) 4370 { 4371 len = strlen (path); 4372 memcpy (path + len, info->append, info->append_len + 1); 4373 } 4374 4375 if (!is_directory (path, true)) 4376 return NULL; 4377 4378 do_spec_1 (info->option, 1, NULL); 4379 if (info->separate_options) 4380 do_spec_1 (" ", 0, NULL); 4381 4382 if (info->append_len == 0) 4383 { 4384 len = strlen (path); 4385 save = path[len - 1]; 4386 if (IS_DIR_SEPARATOR (path[len - 1])) 4387 path[len - 1] = '\0'; 4388 } 4389 4390 do_spec_1 (path, 1, NULL); 4391 do_spec_1 (" ", 0, NULL); 4392 4393 /* Must not damage the original path. */ 4394 if (info->append_len == 0) 4395 path[len - 1] = save; 4396 4397 return NULL; 4398 } 4399 4400 /* Create a temporary FILE with the contents of ARGV. Add @FILE to the 4401 argument list. */ 4402 4403 static void 4404 create_at_file (char **argv) 4405 { 4406 char *temp_file = make_temp_file (""); 4407 char *at_argument = concat ("@", temp_file, NULL); 4408 FILE *f = fopen (temp_file, "w"); 4409 int status; 4410 4411 if (f == NULL) 4412 fatal_error ("could not open temporary response file %s", 4413 temp_file); 4414 4415 status = writeargv (argv, f); 4416 4417 if (status) 4418 fatal_error ("could not write to temporary response file %s", 4419 temp_file); 4420 4421 status = fclose (f); 4422 4423 if (EOF == status) 4424 fatal_error ("could not close temporary response file %s", 4425 temp_file); 4426 4427 store_arg (at_argument, 0, 0); 4428 4429 record_temp_file (temp_file, !save_temps_flag, !save_temps_flag); 4430 } 4431 4432 /* True if we should compile INFILE. */ 4433 4434 static bool 4435 compile_input_file_p (struct infile *infile) 4436 { 4437 if ((!infile->language) || (infile->language[0] != '*')) 4438 if (infile->incompiler == input_file_compiler) 4439 return true; 4440 return false; 4441 } 4442 4443 /* Process each member of VEC as a spec. */ 4444 4445 static void 4446 do_specs_vec (VEC(char_p,heap) *vec) 4447 { 4448 unsigned ix; 4449 char *opt; 4450 4451 FOR_EACH_VEC_ELT (char_p, vec, ix, opt) 4452 { 4453 do_spec_1 (opt, 1, NULL); 4454 /* Make each accumulated option a separate argument. */ 4455 do_spec_1 (" ", 0, NULL); 4456 } 4457 } 4458 4459 /* Process the sub-spec SPEC as a portion of a larger spec. 4460 This is like processing a whole spec except that we do 4461 not initialize at the beginning and we do not supply a 4462 newline by default at the end. 4463 INSWITCH nonzero means don't process %-sequences in SPEC; 4464 in this case, % is treated as an ordinary character. 4465 This is used while substituting switches. 4466 INSWITCH nonzero also causes SPC not to terminate an argument. 4467 4468 Value is zero unless a line was finished 4469 and the command on that line reported an error. */ 4470 4471 static int 4472 do_spec_1 (const char *spec, int inswitch, const char *soft_matched_part) 4473 { 4474 const char *p = spec; 4475 int c; 4476 int i; 4477 int value; 4478 4479 /* If it's an empty string argument to a switch, keep it as is. */ 4480 if (inswitch && !*p) 4481 arg_going = 1; 4482 4483 while ((c = *p++)) 4484 /* If substituting a switch, treat all chars like letters. 4485 Otherwise, NL, SPC, TAB and % are special. */ 4486 switch (inswitch ? 'a' : c) 4487 { 4488 case '\n': 4489 end_going_arg (); 4490 4491 if (VEC_length (const_char_p, argbuf) > 0 4492 && !strcmp (VEC_last (const_char_p, argbuf), "|")) 4493 { 4494 /* A `|' before the newline means use a pipe here, 4495 but only if -pipe was specified. 4496 Otherwise, execute now and don't pass the `|' as an arg. */ 4497 if (use_pipes) 4498 { 4499 input_from_pipe = 1; 4500 break; 4501 } 4502 else 4503 VEC_pop (const_char_p, argbuf); 4504 } 4505 4506 set_collect_gcc_options (); 4507 4508 if (VEC_length (const_char_p, argbuf) > 0) 4509 { 4510 value = execute (); 4511 if (value) 4512 return value; 4513 } 4514 /* Reinitialize for a new command, and for a new argument. */ 4515 clear_args (); 4516 arg_going = 0; 4517 delete_this_arg = 0; 4518 this_is_output_file = 0; 4519 this_is_library_file = 0; 4520 this_is_linker_script = 0; 4521 input_from_pipe = 0; 4522 break; 4523 4524 case '|': 4525 end_going_arg (); 4526 4527 /* Use pipe */ 4528 obstack_1grow (&obstack, c); 4529 arg_going = 1; 4530 break; 4531 4532 case '\t': 4533 case ' ': 4534 end_going_arg (); 4535 4536 /* Reinitialize for a new argument. */ 4537 delete_this_arg = 0; 4538 this_is_output_file = 0; 4539 this_is_library_file = 0; 4540 this_is_linker_script = 0; 4541 break; 4542 4543 case '%': 4544 switch (c = *p++) 4545 { 4546 case 0: 4547 fatal_error ("spec %qs invalid", spec); 4548 4549 case 'b': 4550 if (save_temps_length) 4551 obstack_grow (&obstack, save_temps_prefix, save_temps_length); 4552 else 4553 obstack_grow (&obstack, input_basename, basename_length); 4554 if (compare_debug < 0) 4555 obstack_grow (&obstack, ".gk", 3); 4556 arg_going = 1; 4557 break; 4558 4559 case 'B': 4560 if (save_temps_length) 4561 obstack_grow (&obstack, save_temps_prefix, save_temps_length); 4562 else 4563 obstack_grow (&obstack, input_basename, suffixed_basename_length); 4564 if (compare_debug < 0) 4565 obstack_grow (&obstack, ".gk", 3); 4566 arg_going = 1; 4567 break; 4568 4569 case 'd': 4570 delete_this_arg = 2; 4571 break; 4572 4573 /* Dump out the directories specified with LIBRARY_PATH, 4574 followed by the absolute directories 4575 that we search for startfiles. */ 4576 case 'D': 4577 { 4578 struct spec_path_info info; 4579 4580 info.option = "-L"; 4581 info.append_len = 0; 4582 #ifdef RELATIVE_PREFIX_NOT_LINKDIR 4583 /* Used on systems which record the specified -L dirs 4584 and use them to search for dynamic linking. 4585 Relative directories always come from -B, 4586 and it is better not to use them for searching 4587 at run time. In particular, stage1 loses. */ 4588 info.omit_relative = true; 4589 #else 4590 info.omit_relative = false; 4591 #endif 4592 info.separate_options = false; 4593 4594 for_each_path (&startfile_prefixes, true, 0, spec_path, &info); 4595 } 4596 break; 4597 4598 case 'e': 4599 /* %efoo means report an error with `foo' as error message 4600 and don't execute any more commands for this file. */ 4601 { 4602 const char *q = p; 4603 char *buf; 4604 while (*p != 0 && *p != '\n') 4605 p++; 4606 buf = (char *) alloca (p - q + 1); 4607 strncpy (buf, q, p - q); 4608 buf[p - q] = 0; 4609 error ("%s", _(buf)); 4610 return -1; 4611 } 4612 break; 4613 case 'n': 4614 /* %nfoo means report a notice with `foo' on stderr. */ 4615 { 4616 const char *q = p; 4617 char *buf; 4618 while (*p != 0 && *p != '\n') 4619 p++; 4620 buf = (char *) alloca (p - q + 1); 4621 strncpy (buf, q, p - q); 4622 buf[p - q] = 0; 4623 inform (0, "%s", _(buf)); 4624 if (*p) 4625 p++; 4626 } 4627 break; 4628 4629 case 'j': 4630 { 4631 struct stat st; 4632 4633 /* If save_temps_flag is off, and the HOST_BIT_BUCKET is 4634 defined, and it is not a directory, and it is 4635 writable, use it. Otherwise, treat this like any 4636 other temporary file. */ 4637 4638 if ((!save_temps_flag) 4639 && (stat (HOST_BIT_BUCKET, &st) == 0) && (!S_ISDIR (st.st_mode)) 4640 && (access (HOST_BIT_BUCKET, W_OK) == 0)) 4641 { 4642 obstack_grow (&obstack, HOST_BIT_BUCKET, 4643 strlen (HOST_BIT_BUCKET)); 4644 delete_this_arg = 0; 4645 arg_going = 1; 4646 break; 4647 } 4648 } 4649 goto create_temp_file; 4650 case '|': 4651 if (use_pipes) 4652 { 4653 obstack_1grow (&obstack, '-'); 4654 delete_this_arg = 0; 4655 arg_going = 1; 4656 4657 /* consume suffix */ 4658 while (*p == '.' || ISALNUM ((unsigned char) *p)) 4659 p++; 4660 if (p[0] == '%' && p[1] == 'O') 4661 p += 2; 4662 4663 break; 4664 } 4665 goto create_temp_file; 4666 case 'm': 4667 if (use_pipes) 4668 { 4669 /* consume suffix */ 4670 while (*p == '.' || ISALNUM ((unsigned char) *p)) 4671 p++; 4672 if (p[0] == '%' && p[1] == 'O') 4673 p += 2; 4674 4675 break; 4676 } 4677 goto create_temp_file; 4678 case 'g': 4679 case 'u': 4680 case 'U': 4681 create_temp_file: 4682 { 4683 struct temp_name *t; 4684 int suffix_length; 4685 const char *suffix = p; 4686 char *saved_suffix = NULL; 4687 4688 while (*p == '.' || ISALNUM ((unsigned char) *p)) 4689 p++; 4690 suffix_length = p - suffix; 4691 if (p[0] == '%' && p[1] == 'O') 4692 { 4693 p += 2; 4694 /* We don't support extra suffix characters after %O. */ 4695 if (*p == '.' || ISALNUM ((unsigned char) *p)) 4696 fatal_error ("spec %qs has invalid %<%%0%c%>", spec, *p); 4697 if (suffix_length == 0) 4698 suffix = TARGET_OBJECT_SUFFIX; 4699 else 4700 { 4701 saved_suffix 4702 = XNEWVEC (char, suffix_length 4703 + strlen (TARGET_OBJECT_SUFFIX)); 4704 strncpy (saved_suffix, suffix, suffix_length); 4705 strcpy (saved_suffix + suffix_length, 4706 TARGET_OBJECT_SUFFIX); 4707 } 4708 suffix_length += strlen (TARGET_OBJECT_SUFFIX); 4709 } 4710 4711 if (compare_debug < 0) 4712 { 4713 suffix = concat (".gk", suffix, NULL); 4714 suffix_length += 3; 4715 } 4716 4717 /* If -save-temps=obj and -o were specified, use that for the 4718 temp file. */ 4719 if (save_temps_length) 4720 { 4721 char *tmp; 4722 temp_filename_length 4723 = save_temps_length + suffix_length + 1; 4724 tmp = (char *) alloca (temp_filename_length); 4725 memcpy (tmp, save_temps_prefix, save_temps_length); 4726 memcpy (tmp + save_temps_length, suffix, suffix_length); 4727 tmp[save_temps_length + suffix_length] = '\0'; 4728 temp_filename = save_string (tmp, 4729 temp_filename_length + 1); 4730 obstack_grow (&obstack, temp_filename, 4731 temp_filename_length); 4732 arg_going = 1; 4733 delete_this_arg = 0; 4734 break; 4735 } 4736 4737 /* If the gcc_input_filename has the same suffix specified 4738 for the %g, %u, or %U, and -save-temps is specified, 4739 we could end up using that file as an intermediate 4740 thus clobbering the user's source file (.e.g., 4741 gcc -save-temps foo.s would clobber foo.s with the 4742 output of cpp0). So check for this condition and 4743 generate a temp file as the intermediate. */ 4744 4745 if (save_temps_flag) 4746 { 4747 char *tmp; 4748 temp_filename_length = basename_length + suffix_length + 1; 4749 tmp = (char *) alloca (temp_filename_length); 4750 memcpy (tmp, input_basename, basename_length); 4751 memcpy (tmp + basename_length, suffix, suffix_length); 4752 tmp[basename_length + suffix_length] = '\0'; 4753 temp_filename = tmp; 4754 4755 if (filename_cmp (temp_filename, gcc_input_filename) != 0) 4756 { 4757 #ifndef HOST_LACKS_INODE_NUMBERS 4758 struct stat st_temp; 4759 4760 /* Note, set_input() resets input_stat_set to 0. */ 4761 if (input_stat_set == 0) 4762 { 4763 input_stat_set = stat (gcc_input_filename, 4764 &input_stat); 4765 if (input_stat_set >= 0) 4766 input_stat_set = 1; 4767 } 4768 4769 /* If we have the stat for the gcc_input_filename 4770 and we can do the stat for the temp_filename 4771 then the they could still refer to the same 4772 file if st_dev/st_ino's are the same. */ 4773 if (input_stat_set != 1 4774 || stat (temp_filename, &st_temp) < 0 4775 || input_stat.st_dev != st_temp.st_dev 4776 || input_stat.st_ino != st_temp.st_ino) 4777 #else 4778 /* Just compare canonical pathnames. */ 4779 char* input_realname = lrealpath (gcc_input_filename); 4780 char* temp_realname = lrealpath (temp_filename); 4781 bool files_differ = filename_cmp (input_realname, temp_realname); 4782 free (input_realname); 4783 free (temp_realname); 4784 if (files_differ) 4785 #endif 4786 { 4787 temp_filename = save_string (temp_filename, 4788 temp_filename_length + 1); 4789 obstack_grow (&obstack, temp_filename, 4790 temp_filename_length); 4791 arg_going = 1; 4792 delete_this_arg = 0; 4793 break; 4794 } 4795 } 4796 } 4797 4798 /* See if we already have an association of %g/%u/%U and 4799 suffix. */ 4800 for (t = temp_names; t; t = t->next) 4801 if (t->length == suffix_length 4802 && strncmp (t->suffix, suffix, suffix_length) == 0 4803 && t->unique == (c == 'u' || c == 'U' || c == 'j')) 4804 break; 4805 4806 /* Make a new association if needed. %u and %j 4807 require one. */ 4808 if (t == 0 || c == 'u' || c == 'j') 4809 { 4810 if (t == 0) 4811 { 4812 t = XNEW (struct temp_name); 4813 t->next = temp_names; 4814 temp_names = t; 4815 } 4816 t->length = suffix_length; 4817 if (saved_suffix) 4818 { 4819 t->suffix = saved_suffix; 4820 saved_suffix = NULL; 4821 } 4822 else 4823 t->suffix = save_string (suffix, suffix_length); 4824 t->unique = (c == 'u' || c == 'U' || c == 'j'); 4825 temp_filename = make_temp_file (t->suffix); 4826 temp_filename_length = strlen (temp_filename); 4827 t->filename = temp_filename; 4828 t->filename_length = temp_filename_length; 4829 } 4830 4831 free (saved_suffix); 4832 4833 obstack_grow (&obstack, t->filename, t->filename_length); 4834 delete_this_arg = 1; 4835 } 4836 arg_going = 1; 4837 break; 4838 4839 case 'i': 4840 if (combine_inputs) 4841 { 4842 if (at_file_supplied) 4843 { 4844 /* We are going to expand `%i' to `@FILE', where FILE 4845 is a newly-created temporary filename. The filenames 4846 that would usually be expanded in place of %o will be 4847 written to the temporary file. */ 4848 char **argv; 4849 int n_files = 0; 4850 int j; 4851 4852 for (i = 0; i < n_infiles; i++) 4853 if (compile_input_file_p (&infiles[i])) 4854 n_files++; 4855 4856 argv = (char **) alloca (sizeof (char *) * (n_files + 1)); 4857 4858 /* Copy the strings over. */ 4859 for (i = 0, j = 0; i < n_infiles; i++) 4860 if (compile_input_file_p (&infiles[i])) 4861 { 4862 argv[j] = CONST_CAST (char *, infiles[i].name); 4863 infiles[i].compiled = true; 4864 j++; 4865 } 4866 argv[j] = NULL; 4867 4868 create_at_file (argv); 4869 } 4870 else 4871 for (i = 0; (int) i < n_infiles; i++) 4872 if (compile_input_file_p (&infiles[i])) 4873 { 4874 store_arg (infiles[i].name, 0, 0); 4875 infiles[i].compiled = true; 4876 } 4877 } 4878 else 4879 { 4880 obstack_grow (&obstack, gcc_input_filename, 4881 input_filename_length); 4882 arg_going = 1; 4883 } 4884 break; 4885 4886 case 'I': 4887 { 4888 struct spec_path_info info; 4889 4890 if (multilib_dir) 4891 { 4892 do_spec_1 ("-imultilib", 1, NULL); 4893 /* Make this a separate argument. */ 4894 do_spec_1 (" ", 0, NULL); 4895 do_spec_1 (multilib_dir, 1, NULL); 4896 do_spec_1 (" ", 0, NULL); 4897 } 4898 4899 if (gcc_exec_prefix) 4900 { 4901 do_spec_1 ("-iprefix", 1, NULL); 4902 /* Make this a separate argument. */ 4903 do_spec_1 (" ", 0, NULL); 4904 do_spec_1 (gcc_exec_prefix, 1, NULL); 4905 do_spec_1 (" ", 0, NULL); 4906 } 4907 4908 if (target_system_root_changed || 4909 (target_system_root && target_sysroot_hdrs_suffix)) 4910 { 4911 do_spec_1 ("-isysroot", 1, NULL); 4912 /* Make this a separate argument. */ 4913 do_spec_1 (" ", 0, NULL); 4914 do_spec_1 (target_system_root, 1, NULL); 4915 if (target_sysroot_hdrs_suffix) 4916 do_spec_1 (target_sysroot_hdrs_suffix, 1, NULL); 4917 do_spec_1 (" ", 0, NULL); 4918 } 4919 4920 info.option = "-isystem"; 4921 info.append = "include"; 4922 info.append_len = strlen (info.append); 4923 info.omit_relative = false; 4924 info.separate_options = true; 4925 4926 for_each_path (&include_prefixes, false, info.append_len, 4927 spec_path, &info); 4928 4929 info.append = "include-fixed"; 4930 if (*sysroot_hdrs_suffix_spec) 4931 info.append = concat (info.append, dir_separator_str, 4932 multilib_dir, NULL); 4933 info.append_len = strlen (info.append); 4934 for_each_path (&include_prefixes, false, info.append_len, 4935 spec_path, &info); 4936 } 4937 break; 4938 4939 case 'o': 4940 { 4941 int max = n_infiles; 4942 max += lang_specific_extra_outfiles; 4943 4944 if (HAVE_GNU_LD && at_file_supplied) 4945 { 4946 /* We are going to expand `%o' to `@FILE', where FILE 4947 is a newly-created temporary filename. The filenames 4948 that would usually be expanded in place of %o will be 4949 written to the temporary file. */ 4950 4951 char **argv; 4952 int n_files, j; 4953 4954 /* Convert OUTFILES into a form suitable for writeargv. */ 4955 4956 /* Determine how many are non-NULL. */ 4957 for (n_files = 0, i = 0; i < max; i++) 4958 n_files += outfiles[i] != NULL; 4959 4960 argv = (char **) alloca (sizeof (char *) * (n_files + 1)); 4961 4962 /* Copy the strings over. */ 4963 for (i = 0, j = 0; i < max; i++) 4964 if (outfiles[i]) 4965 { 4966 argv[j] = CONST_CAST (char *, outfiles[i]); 4967 j++; 4968 } 4969 argv[j] = NULL; 4970 4971 create_at_file (argv); 4972 } 4973 else 4974 for (i = 0; i < max; i++) 4975 if (outfiles[i]) 4976 store_arg (outfiles[i], 0, 0); 4977 break; 4978 } 4979 4980 case 'O': 4981 obstack_grow (&obstack, TARGET_OBJECT_SUFFIX, strlen (TARGET_OBJECT_SUFFIX)); 4982 arg_going = 1; 4983 break; 4984 4985 case 's': 4986 this_is_library_file = 1; 4987 break; 4988 4989 case 'T': 4990 this_is_linker_script = 1; 4991 break; 4992 4993 case 'V': 4994 outfiles[input_file_number] = NULL; 4995 break; 4996 4997 case 'w': 4998 this_is_output_file = 1; 4999 break; 5000 5001 case 'W': 5002 { 5003 unsigned int cur_index = VEC_length (const_char_p, argbuf); 5004 /* Handle the {...} following the %W. */ 5005 if (*p != '{') 5006 fatal_error ("spec %qs has invalid %<%%W%c%>", spec, *p); 5007 p = handle_braces (p + 1); 5008 if (p == 0) 5009 return -1; 5010 end_going_arg (); 5011 /* If any args were output, mark the last one for deletion 5012 on failure. */ 5013 if (VEC_length (const_char_p, argbuf) != cur_index) 5014 record_temp_file (VEC_last (const_char_p, argbuf), 0, 1); 5015 break; 5016 } 5017 5018 /* %x{OPTION} records OPTION for %X to output. */ 5019 case 'x': 5020 { 5021 const char *p1 = p; 5022 char *string; 5023 char *opt; 5024 unsigned ix; 5025 5026 /* Skip past the option value and make a copy. */ 5027 if (*p != '{') 5028 fatal_error ("spec %qs has invalid %<%%x%c%>", spec, *p); 5029 while (*p++ != '}') 5030 ; 5031 string = save_string (p1 + 1, p - p1 - 2); 5032 5033 /* See if we already recorded this option. */ 5034 FOR_EACH_VEC_ELT (char_p, linker_options, ix, opt) 5035 if (! strcmp (string, opt)) 5036 { 5037 free (string); 5038 return 0; 5039 } 5040 5041 /* This option is new; add it. */ 5042 add_linker_option (string, strlen (string)); 5043 } 5044 break; 5045 5046 /* Dump out the options accumulated previously using %x. */ 5047 case 'X': 5048 do_specs_vec (linker_options); 5049 break; 5050 5051 /* Dump out the options accumulated previously using -Wa,. */ 5052 case 'Y': 5053 do_specs_vec (assembler_options); 5054 break; 5055 5056 /* Dump out the options accumulated previously using -Wp,. */ 5057 case 'Z': 5058 do_specs_vec (preprocessor_options); 5059 break; 5060 5061 /* Here are digits and numbers that just process 5062 a certain constant string as a spec. */ 5063 5064 case '1': 5065 value = do_spec_1 (cc1_spec, 0, NULL); 5066 if (value != 0) 5067 return value; 5068 break; 5069 5070 case '2': 5071 value = do_spec_1 (cc1plus_spec, 0, NULL); 5072 if (value != 0) 5073 return value; 5074 break; 5075 5076 case 'a': 5077 value = do_spec_1 (asm_spec, 0, NULL); 5078 if (value != 0) 5079 return value; 5080 break; 5081 5082 case 'A': 5083 value = do_spec_1 (asm_final_spec, 0, NULL); 5084 if (value != 0) 5085 return value; 5086 break; 5087 5088 case 'C': 5089 { 5090 const char *const spec 5091 = (input_file_compiler->cpp_spec 5092 ? input_file_compiler->cpp_spec 5093 : cpp_spec); 5094 value = do_spec_1 (spec, 0, NULL); 5095 if (value != 0) 5096 return value; 5097 } 5098 break; 5099 5100 case 'E': 5101 value = do_spec_1 (endfile_spec, 0, NULL); 5102 if (value != 0) 5103 return value; 5104 break; 5105 5106 case 'l': 5107 value = do_spec_1 (link_spec, 0, NULL); 5108 if (value != 0) 5109 return value; 5110 break; 5111 5112 case 'L': 5113 value = do_spec_1 (lib_spec, 0, NULL); 5114 if (value != 0) 5115 return value; 5116 break; 5117 5118 case 'G': 5119 value = do_spec_1 (libgcc_spec, 0, NULL); 5120 if (value != 0) 5121 return value; 5122 break; 5123 5124 case 'R': 5125 /* We assume there is a directory 5126 separator at the end of this string. */ 5127 if (target_system_root) 5128 { 5129 obstack_grow (&obstack, target_system_root, 5130 strlen (target_system_root)); 5131 if (target_sysroot_suffix) 5132 obstack_grow (&obstack, target_sysroot_suffix, 5133 strlen (target_sysroot_suffix)); 5134 } 5135 break; 5136 5137 case 'S': 5138 value = do_spec_1 (startfile_spec, 0, NULL); 5139 if (value != 0) 5140 return value; 5141 break; 5142 5143 /* Here we define characters other than letters and digits. */ 5144 5145 case '{': 5146 p = handle_braces (p); 5147 if (p == 0) 5148 return -1; 5149 break; 5150 5151 case ':': 5152 p = handle_spec_function (p); 5153 if (p == 0) 5154 return -1; 5155 break; 5156 5157 case '%': 5158 obstack_1grow (&obstack, '%'); 5159 break; 5160 5161 case '.': 5162 { 5163 unsigned len = 0; 5164 5165 while (p[len] && p[len] != ' ' && p[len] != '%') 5166 len++; 5167 suffix_subst = save_string (p - 1, len + 1); 5168 p += len; 5169 } 5170 break; 5171 5172 /* Henceforth ignore the option(s) matching the pattern 5173 after the %<. */ 5174 case '<': 5175 case '>': 5176 { 5177 unsigned len = 0; 5178 int have_wildcard = 0; 5179 int i; 5180 int switch_option; 5181 5182 if (c == '>') 5183 switch_option = SWITCH_IGNORE | SWITCH_KEEP_FOR_GCC; 5184 else 5185 switch_option = SWITCH_IGNORE; 5186 5187 while (p[len] && p[len] != ' ' && p[len] != '\t') 5188 len++; 5189 5190 if (p[len-1] == '*') 5191 have_wildcard = 1; 5192 5193 for (i = 0; i < n_switches; i++) 5194 if (!strncmp (switches[i].part1, p, len - have_wildcard) 5195 && (have_wildcard || switches[i].part1[len] == '\0')) 5196 { 5197 switches[i].live_cond |= switch_option; 5198 switches[i].validated = 1; 5199 } 5200 5201 p += len; 5202 } 5203 break; 5204 5205 case '*': 5206 if (soft_matched_part) 5207 { 5208 if (soft_matched_part[0]) 5209 do_spec_1 (soft_matched_part, 1, NULL); 5210 do_spec_1 (" ", 0, NULL); 5211 } 5212 else 5213 /* Catch the case where a spec string contains something like 5214 '%{foo:%*}'. i.e. there is no * in the pattern on the left 5215 hand side of the :. */ 5216 error ("spec failure: %<%%*%> has not been initialized by pattern match"); 5217 break; 5218 5219 /* Process a string found as the value of a spec given by name. 5220 This feature allows individual machine descriptions 5221 to add and use their own specs. */ 5222 case '(': 5223 { 5224 const char *name = p; 5225 struct spec_list *sl; 5226 int len; 5227 5228 /* The string after the S/P is the name of a spec that is to be 5229 processed. */ 5230 while (*p && *p != ')') 5231 p++; 5232 5233 /* See if it's in the list. */ 5234 for (len = p - name, sl = specs; sl; sl = sl->next) 5235 if (sl->name_len == len && !strncmp (sl->name, name, len)) 5236 { 5237 name = *(sl->ptr_spec); 5238 #ifdef DEBUG_SPECS 5239 fnotice (stderr, "Processing spec (%s), which is '%s'\n", 5240 sl->name, name); 5241 #endif 5242 break; 5243 } 5244 5245 if (sl) 5246 { 5247 value = do_spec_1 (name, 0, NULL); 5248 if (value != 0) 5249 return value; 5250 } 5251 5252 /* Discard the closing paren. */ 5253 if (*p) 5254 p++; 5255 } 5256 break; 5257 5258 default: 5259 error ("spec failure: unrecognized spec option %qc", c); 5260 break; 5261 } 5262 break; 5263 5264 case '\\': 5265 /* Backslash: treat next character as ordinary. */ 5266 c = *p++; 5267 5268 /* Fall through. */ 5269 default: 5270 /* Ordinary character: put it into the current argument. */ 5271 obstack_1grow (&obstack, c); 5272 arg_going = 1; 5273 } 5274 5275 /* End of string. If we are processing a spec function, we need to 5276 end any pending argument. */ 5277 if (processing_spec_function) 5278 end_going_arg (); 5279 5280 return 0; 5281 } 5282 5283 /* Look up a spec function. */ 5284 5285 static const struct spec_function * 5286 lookup_spec_function (const char *name) 5287 { 5288 const struct spec_function *sf; 5289 5290 for (sf = static_spec_functions; sf->name != NULL; sf++) 5291 if (strcmp (sf->name, name) == 0) 5292 return sf; 5293 5294 return NULL; 5295 } 5296 5297 /* Evaluate a spec function. */ 5298 5299 static const char * 5300 eval_spec_function (const char *func, const char *args) 5301 { 5302 const struct spec_function *sf; 5303 const char *funcval; 5304 5305 /* Saved spec processing context. */ 5306 VEC(const_char_p,heap) *save_argbuf; 5307 5308 int save_arg_going; 5309 int save_delete_this_arg; 5310 int save_this_is_output_file; 5311 int save_this_is_library_file; 5312 int save_input_from_pipe; 5313 int save_this_is_linker_script; 5314 const char *save_suffix_subst; 5315 5316 5317 sf = lookup_spec_function (func); 5318 if (sf == NULL) 5319 fatal_error ("unknown spec function %qs", func); 5320 5321 /* Push the spec processing context. */ 5322 save_argbuf = argbuf; 5323 5324 save_arg_going = arg_going; 5325 save_delete_this_arg = delete_this_arg; 5326 save_this_is_output_file = this_is_output_file; 5327 save_this_is_library_file = this_is_library_file; 5328 save_this_is_linker_script = this_is_linker_script; 5329 save_input_from_pipe = input_from_pipe; 5330 save_suffix_subst = suffix_subst; 5331 5332 /* Create a new spec processing context, and build the function 5333 arguments. */ 5334 5335 alloc_args (); 5336 if (do_spec_2 (args) < 0) 5337 fatal_error ("error in args to spec function %qs", func); 5338 5339 /* argbuf_index is an index for the next argument to be inserted, and 5340 so contains the count of the args already inserted. */ 5341 5342 funcval = (*sf->func) (VEC_length (const_char_p, argbuf), 5343 VEC_address (const_char_p, argbuf)); 5344 5345 /* Pop the spec processing context. */ 5346 VEC_free (const_char_p, heap, argbuf); 5347 argbuf = save_argbuf; 5348 5349 arg_going = save_arg_going; 5350 delete_this_arg = save_delete_this_arg; 5351 this_is_output_file = save_this_is_output_file; 5352 this_is_library_file = save_this_is_library_file; 5353 this_is_linker_script = save_this_is_linker_script; 5354 input_from_pipe = save_input_from_pipe; 5355 suffix_subst = save_suffix_subst; 5356 5357 return funcval; 5358 } 5359 5360 /* Handle a spec function call of the form: 5361 5362 %:function(args) 5363 5364 ARGS is processed as a spec in a separate context and split into an 5365 argument vector in the normal fashion. The function returns a string 5366 containing a spec which we then process in the caller's context, or 5367 NULL if no processing is required. */ 5368 5369 static const char * 5370 handle_spec_function (const char *p) 5371 { 5372 char *func, *args; 5373 const char *endp, *funcval; 5374 int count; 5375 5376 processing_spec_function++; 5377 5378 /* Get the function name. */ 5379 for (endp = p; *endp != '\0'; endp++) 5380 { 5381 if (*endp == '(') /* ) */ 5382 break; 5383 /* Only allow [A-Za-z0-9], -, and _ in function names. */ 5384 if (!ISALNUM (*endp) && !(*endp == '-' || *endp == '_')) 5385 fatal_error ("malformed spec function name"); 5386 } 5387 if (*endp != '(') /* ) */ 5388 fatal_error ("no arguments for spec function"); 5389 func = save_string (p, endp - p); 5390 p = ++endp; 5391 5392 /* Get the arguments. */ 5393 for (count = 0; *endp != '\0'; endp++) 5394 { 5395 /* ( */ 5396 if (*endp == ')') 5397 { 5398 if (count == 0) 5399 break; 5400 count--; 5401 } 5402 else if (*endp == '(') /* ) */ 5403 count++; 5404 } 5405 /* ( */ 5406 if (*endp != ')') 5407 fatal_error ("malformed spec function arguments"); 5408 args = save_string (p, endp - p); 5409 p = ++endp; 5410 5411 /* p now points to just past the end of the spec function expression. */ 5412 5413 funcval = eval_spec_function (func, args); 5414 if (funcval != NULL && do_spec_1 (funcval, 0, NULL) < 0) 5415 p = NULL; 5416 5417 free (func); 5418 free (args); 5419 5420 processing_spec_function--; 5421 5422 return p; 5423 } 5424 5425 /* Inline subroutine of handle_braces. Returns true if the current 5426 input suffix matches the atom bracketed by ATOM and END_ATOM. */ 5427 static inline bool 5428 input_suffix_matches (const char *atom, const char *end_atom) 5429 { 5430 return (input_suffix 5431 && !strncmp (input_suffix, atom, end_atom - atom) 5432 && input_suffix[end_atom - atom] == '\0'); 5433 } 5434 5435 /* Subroutine of handle_braces. Returns true if the current 5436 input file's spec name matches the atom bracketed by ATOM and END_ATOM. */ 5437 static bool 5438 input_spec_matches (const char *atom, const char *end_atom) 5439 { 5440 return (input_file_compiler 5441 && input_file_compiler->suffix 5442 && input_file_compiler->suffix[0] != '\0' 5443 && !strncmp (input_file_compiler->suffix + 1, atom, 5444 end_atom - atom) 5445 && input_file_compiler->suffix[end_atom - atom + 1] == '\0'); 5446 } 5447 5448 /* Subroutine of handle_braces. Returns true if a switch 5449 matching the atom bracketed by ATOM and END_ATOM appeared on the 5450 command line. */ 5451 static bool 5452 switch_matches (const char *atom, const char *end_atom, int starred) 5453 { 5454 int i; 5455 int len = end_atom - atom; 5456 int plen = starred ? len : -1; 5457 5458 for (i = 0; i < n_switches; i++) 5459 if (!strncmp (switches[i].part1, atom, len) 5460 && (starred || switches[i].part1[len] == '\0') 5461 && check_live_switch (i, plen)) 5462 return true; 5463 5464 /* Check if a switch with separated form matching the atom. 5465 We check -D and -U switches. */ 5466 else if (switches[i].args != 0) 5467 { 5468 if ((*switches[i].part1 == 'D' || *switches[i].part1 == 'U') 5469 && *switches[i].part1 == atom[0]) 5470 { 5471 if (!strncmp (switches[i].args[0], &atom[1], len - 1) 5472 && (starred || (switches[i].part1[1] == '\0' 5473 && switches[i].args[0][len - 1] == '\0')) 5474 && check_live_switch (i, (starred ? 1 : -1))) 5475 return true; 5476 } 5477 } 5478 5479 return false; 5480 } 5481 5482 /* Inline subroutine of handle_braces. Mark all of the switches which 5483 match ATOM (extends to END_ATOM; STARRED indicates whether there 5484 was a star after the atom) for later processing. */ 5485 static inline void 5486 mark_matching_switches (const char *atom, const char *end_atom, int starred) 5487 { 5488 int i; 5489 int len = end_atom - atom; 5490 int plen = starred ? len : -1; 5491 5492 for (i = 0; i < n_switches; i++) 5493 if (!strncmp (switches[i].part1, atom, len) 5494 && (starred || switches[i].part1[len] == '\0') 5495 && check_live_switch (i, plen)) 5496 switches[i].ordering = 1; 5497 } 5498 5499 /* Inline subroutine of handle_braces. Process all the currently 5500 marked switches through give_switch, and clear the marks. */ 5501 static inline void 5502 process_marked_switches (void) 5503 { 5504 int i; 5505 5506 for (i = 0; i < n_switches; i++) 5507 if (switches[i].ordering == 1) 5508 { 5509 switches[i].ordering = 0; 5510 give_switch (i, 0); 5511 } 5512 } 5513 5514 /* Handle a %{ ... } construct. P points just inside the leading {. 5515 Returns a pointer one past the end of the brace block, or 0 5516 if we call do_spec_1 and that returns -1. */ 5517 5518 static const char * 5519 handle_braces (const char *p) 5520 { 5521 const char *atom, *end_atom; 5522 const char *d_atom = NULL, *d_end_atom = NULL; 5523 const char *orig = p; 5524 5525 bool a_is_suffix; 5526 bool a_is_spectype; 5527 bool a_is_starred; 5528 bool a_is_negated; 5529 bool a_matched; 5530 5531 bool a_must_be_last = false; 5532 bool ordered_set = false; 5533 bool disjunct_set = false; 5534 bool disj_matched = false; 5535 bool disj_starred = true; 5536 bool n_way_choice = false; 5537 bool n_way_matched = false; 5538 5539 #define SKIP_WHITE() do { while (*p == ' ' || *p == '\t') p++; } while (0) 5540 5541 do 5542 { 5543 if (a_must_be_last) 5544 goto invalid; 5545 5546 /* Scan one "atom" (S in the description above of %{}, possibly 5547 with '!', '.', '@', ',', or '*' modifiers). */ 5548 a_matched = false; 5549 a_is_suffix = false; 5550 a_is_starred = false; 5551 a_is_negated = false; 5552 a_is_spectype = false; 5553 5554 SKIP_WHITE(); 5555 if (*p == '!') 5556 p++, a_is_negated = true; 5557 5558 SKIP_WHITE(); 5559 if (*p == '.') 5560 p++, a_is_suffix = true; 5561 else if (*p == ',') 5562 p++, a_is_spectype = true; 5563 5564 atom = p; 5565 while (ISIDNUM(*p) || *p == '-' || *p == '+' || *p == '=' 5566 || *p == ',' || *p == '.' || *p == '@') 5567 p++; 5568 end_atom = p; 5569 5570 if (*p == '*') 5571 p++, a_is_starred = 1; 5572 5573 SKIP_WHITE(); 5574 switch (*p) 5575 { 5576 case '&': case '}': 5577 /* Substitute the switch(es) indicated by the current atom. */ 5578 ordered_set = true; 5579 if (disjunct_set || n_way_choice || a_is_negated || a_is_suffix 5580 || a_is_spectype || atom == end_atom) 5581 goto invalid; 5582 5583 mark_matching_switches (atom, end_atom, a_is_starred); 5584 5585 if (*p == '}') 5586 process_marked_switches (); 5587 break; 5588 5589 case '|': case ':': 5590 /* Substitute some text if the current atom appears as a switch 5591 or suffix. */ 5592 disjunct_set = true; 5593 if (ordered_set) 5594 goto invalid; 5595 5596 if (atom == end_atom) 5597 { 5598 if (!n_way_choice || disj_matched || *p == '|' 5599 || a_is_negated || a_is_suffix || a_is_spectype 5600 || a_is_starred) 5601 goto invalid; 5602 5603 /* An empty term may appear as the last choice of an 5604 N-way choice set; it means "otherwise". */ 5605 a_must_be_last = true; 5606 disj_matched = !n_way_matched; 5607 disj_starred = false; 5608 } 5609 else 5610 { 5611 if ((a_is_suffix || a_is_spectype) && a_is_starred) 5612 goto invalid; 5613 5614 if (!a_is_starred) 5615 disj_starred = false; 5616 5617 /* Don't bother testing this atom if we already have a 5618 match. */ 5619 if (!disj_matched && !n_way_matched) 5620 { 5621 if (a_is_suffix) 5622 a_matched = input_suffix_matches (atom, end_atom); 5623 else if (a_is_spectype) 5624 a_matched = input_spec_matches (atom, end_atom); 5625 else 5626 a_matched = switch_matches (atom, end_atom, a_is_starred); 5627 5628 if (a_matched != a_is_negated) 5629 { 5630 disj_matched = true; 5631 d_atom = atom; 5632 d_end_atom = end_atom; 5633 } 5634 } 5635 } 5636 5637 if (*p == ':') 5638 { 5639 /* Found the body, that is, the text to substitute if the 5640 current disjunction matches. */ 5641 p = process_brace_body (p + 1, d_atom, d_end_atom, disj_starred, 5642 disj_matched && !n_way_matched); 5643 if (p == 0) 5644 return 0; 5645 5646 /* If we have an N-way choice, reset state for the next 5647 disjunction. */ 5648 if (*p == ';') 5649 { 5650 n_way_choice = true; 5651 n_way_matched |= disj_matched; 5652 disj_matched = false; 5653 disj_starred = true; 5654 d_atom = d_end_atom = NULL; 5655 } 5656 } 5657 break; 5658 5659 default: 5660 goto invalid; 5661 } 5662 } 5663 while (*p++ != '}'); 5664 5665 return p; 5666 5667 invalid: 5668 fatal_error ("braced spec %qs is invalid at %qc", orig, *p); 5669 5670 #undef SKIP_WHITE 5671 } 5672 5673 /* Subroutine of handle_braces. Scan and process a brace substitution body 5674 (X in the description of %{} syntax). P points one past the colon; 5675 ATOM and END_ATOM bracket the first atom which was found to be true 5676 (present) in the current disjunction; STARRED indicates whether all 5677 the atoms in the current disjunction were starred (for syntax validation); 5678 MATCHED indicates whether the disjunction matched or not, and therefore 5679 whether or not the body is to be processed through do_spec_1 or just 5680 skipped. Returns a pointer to the closing } or ;, or 0 if do_spec_1 5681 returns -1. */ 5682 5683 static const char * 5684 process_brace_body (const char *p, const char *atom, const char *end_atom, 5685 int starred, int matched) 5686 { 5687 const char *body, *end_body; 5688 unsigned int nesting_level; 5689 bool have_subst = false; 5690 5691 /* Locate the closing } or ;, honoring nested braces. 5692 Trim trailing whitespace. */ 5693 body = p; 5694 nesting_level = 1; 5695 for (;;) 5696 { 5697 if (*p == '{') 5698 nesting_level++; 5699 else if (*p == '}') 5700 { 5701 if (!--nesting_level) 5702 break; 5703 } 5704 else if (*p == ';' && nesting_level == 1) 5705 break; 5706 else if (*p == '%' && p[1] == '*' && nesting_level == 1) 5707 have_subst = true; 5708 else if (*p == '\0') 5709 goto invalid; 5710 p++; 5711 } 5712 5713 end_body = p; 5714 while (end_body[-1] == ' ' || end_body[-1] == '\t') 5715 end_body--; 5716 5717 if (have_subst && !starred) 5718 goto invalid; 5719 5720 if (matched) 5721 { 5722 /* Copy the substitution body to permanent storage and execute it. 5723 If have_subst is false, this is a simple matter of running the 5724 body through do_spec_1... */ 5725 char *string = save_string (body, end_body - body); 5726 if (!have_subst) 5727 { 5728 if (do_spec_1 (string, 0, NULL) < 0) 5729 return 0; 5730 } 5731 else 5732 { 5733 /* ... but if have_subst is true, we have to process the 5734 body once for each matching switch, with %* set to the 5735 variant part of the switch. */ 5736 unsigned int hard_match_len = end_atom - atom; 5737 int i; 5738 5739 for (i = 0; i < n_switches; i++) 5740 if (!strncmp (switches[i].part1, atom, hard_match_len) 5741 && check_live_switch (i, hard_match_len)) 5742 { 5743 if (do_spec_1 (string, 0, 5744 &switches[i].part1[hard_match_len]) < 0) 5745 return 0; 5746 /* Pass any arguments this switch has. */ 5747 give_switch (i, 1); 5748 suffix_subst = NULL; 5749 } 5750 } 5751 } 5752 5753 return p; 5754 5755 invalid: 5756 fatal_error ("braced spec body %qs is invalid", body); 5757 } 5758 5759 /* Return 0 iff switch number SWITCHNUM is obsoleted by a later switch 5760 on the command line. PREFIX_LENGTH is the length of XXX in an {XXX*} 5761 spec, or -1 if either exact match or %* is used. 5762 5763 A -O switch is obsoleted by a later -O switch. A -f, -m, or -W switch 5764 whose value does not begin with "no-" is obsoleted by the same value 5765 with the "no-", similarly for a switch with the "no-" prefix. */ 5766 5767 static int 5768 check_live_switch (int switchnum, int prefix_length) 5769 { 5770 const char *name = switches[switchnum].part1; 5771 int i; 5772 5773 /* If we already processed this switch and determined if it was 5774 live or not, return our past determination. */ 5775 if (switches[switchnum].live_cond != 0) 5776 return ((switches[switchnum].live_cond & SWITCH_LIVE) != 0 5777 && (switches[switchnum].live_cond & SWITCH_FALSE) == 0 5778 && (switches[switchnum].live_cond & SWITCH_IGNORE_PERMANENTLY) 5779 == 0); 5780 5781 /* In the common case of {<at-most-one-letter>*}, a negating 5782 switch would always match, so ignore that case. We will just 5783 send the conflicting switches to the compiler phase. */ 5784 if (prefix_length >= 0 && prefix_length <= 1) 5785 return 1; 5786 5787 /* Now search for duplicate in a manner that depends on the name. */ 5788 switch (*name) 5789 { 5790 case 'O': 5791 for (i = switchnum + 1; i < n_switches; i++) 5792 if (switches[i].part1[0] == 'O') 5793 { 5794 switches[switchnum].validated = 1; 5795 switches[switchnum].live_cond = SWITCH_FALSE; 5796 return 0; 5797 } 5798 break; 5799 5800 case 'W': case 'f': case 'm': 5801 if (! strncmp (name + 1, "no-", 3)) 5802 { 5803 /* We have Xno-YYY, search for XYYY. */ 5804 for (i = switchnum + 1; i < n_switches; i++) 5805 if (switches[i].part1[0] == name[0] 5806 && ! strcmp (&switches[i].part1[1], &name[4])) 5807 { 5808 switches[switchnum].validated = 1; 5809 switches[switchnum].live_cond = SWITCH_FALSE; 5810 return 0; 5811 } 5812 } 5813 else 5814 { 5815 /* We have XYYY, search for Xno-YYY. */ 5816 for (i = switchnum + 1; i < n_switches; i++) 5817 if (switches[i].part1[0] == name[0] 5818 && switches[i].part1[1] == 'n' 5819 && switches[i].part1[2] == 'o' 5820 && switches[i].part1[3] == '-' 5821 && !strcmp (&switches[i].part1[4], &name[1])) 5822 { 5823 switches[switchnum].validated = 1; 5824 switches[switchnum].live_cond = SWITCH_FALSE; 5825 return 0; 5826 } 5827 } 5828 break; 5829 } 5830 5831 /* Otherwise the switch is live. */ 5832 switches[switchnum].live_cond |= SWITCH_LIVE; 5833 return 1; 5834 } 5835 5836 /* Pass a switch to the current accumulating command 5837 in the same form that we received it. 5838 SWITCHNUM identifies the switch; it is an index into 5839 the vector of switches gcc received, which is `switches'. 5840 This cannot fail since it never finishes a command line. 5841 5842 If OMIT_FIRST_WORD is nonzero, then we omit .part1 of the argument. */ 5843 5844 static void 5845 give_switch (int switchnum, int omit_first_word) 5846 { 5847 if ((switches[switchnum].live_cond & SWITCH_IGNORE) != 0) 5848 return; 5849 5850 if (!omit_first_word) 5851 { 5852 do_spec_1 ("-", 0, NULL); 5853 do_spec_1 (switches[switchnum].part1, 1, NULL); 5854 } 5855 5856 if (switches[switchnum].args != 0) 5857 { 5858 const char **p; 5859 for (p = switches[switchnum].args; *p; p++) 5860 { 5861 const char *arg = *p; 5862 5863 do_spec_1 (" ", 0, NULL); 5864 if (suffix_subst) 5865 { 5866 unsigned length = strlen (arg); 5867 int dot = 0; 5868 5869 while (length-- && !IS_DIR_SEPARATOR (arg[length])) 5870 if (arg[length] == '.') 5871 { 5872 (CONST_CAST(char *, arg))[length] = 0; 5873 dot = 1; 5874 break; 5875 } 5876 do_spec_1 (arg, 1, NULL); 5877 if (dot) 5878 (CONST_CAST(char *, arg))[length] = '.'; 5879 do_spec_1 (suffix_subst, 1, NULL); 5880 } 5881 else 5882 do_spec_1 (arg, 1, NULL); 5883 } 5884 } 5885 5886 do_spec_1 (" ", 0, NULL); 5887 switches[switchnum].validated = 1; 5888 } 5889 5890 /* Search for a file named NAME trying various prefixes including the 5891 user's -B prefix and some standard ones. 5892 Return the absolute file name found. If nothing is found, return NAME. */ 5893 5894 static const char * 5895 find_file (const char *name) 5896 { 5897 char *newname = find_a_file (&startfile_prefixes, name, R_OK, true); 5898 return newname ? newname : name; 5899 } 5900 5901 /* Determine whether a directory exists. If LINKER, return 0 for 5902 certain fixed names not needed by the linker. */ 5903 5904 static int 5905 is_directory (const char *path1, bool linker) 5906 { 5907 int len1; 5908 char *path; 5909 char *cp; 5910 struct stat st; 5911 5912 /* Ensure the string ends with "/.". The resulting path will be a 5913 directory even if the given path is a symbolic link. */ 5914 len1 = strlen (path1); 5915 path = (char *) alloca (3 + len1); 5916 memcpy (path, path1, len1); 5917 cp = path + len1; 5918 if (!IS_DIR_SEPARATOR (cp[-1])) 5919 *cp++ = DIR_SEPARATOR; 5920 *cp++ = '.'; 5921 *cp = '\0'; 5922 5923 /* Exclude directories that the linker is known to search. */ 5924 if (linker 5925 && IS_DIR_SEPARATOR (path[0]) 5926 && ((cp - path == 6 5927 && filename_ncmp (path + 1, "lib", 3) == 0) 5928 || (cp - path == 10 5929 && filename_ncmp (path + 1, "usr", 3) == 0 5930 && IS_DIR_SEPARATOR (path[4]) 5931 && filename_ncmp (path + 5, "lib", 3) == 0))) 5932 return 0; 5933 5934 return (stat (path, &st) >= 0 && S_ISDIR (st.st_mode)); 5935 } 5936 5937 /* Set up the various global variables to indicate that we're processing 5938 the input file named FILENAME. */ 5939 5940 void 5941 set_input (const char *filename) 5942 { 5943 const char *p; 5944 5945 gcc_input_filename = filename; 5946 input_filename_length = strlen (gcc_input_filename); 5947 input_basename = lbasename (gcc_input_filename); 5948 5949 /* Find a suffix starting with the last period, 5950 and set basename_length to exclude that suffix. */ 5951 basename_length = strlen (input_basename); 5952 suffixed_basename_length = basename_length; 5953 p = input_basename + basename_length; 5954 while (p != input_basename && *p != '.') 5955 --p; 5956 if (*p == '.' && p != input_basename) 5957 { 5958 basename_length = p - input_basename; 5959 input_suffix = p + 1; 5960 } 5961 else 5962 input_suffix = ""; 5963 5964 /* If a spec for 'g', 'u', or 'U' is seen with -save-temps then 5965 we will need to do a stat on the gcc_input_filename. The 5966 INPUT_STAT_SET signals that the stat is needed. */ 5967 input_stat_set = 0; 5968 } 5969 5970 /* On fatal signals, delete all the temporary files. */ 5971 5972 static void 5973 fatal_signal (int signum) 5974 { 5975 signal (signum, SIG_DFL); 5976 delete_failure_queue (); 5977 delete_temp_files (); 5978 /* Get the same signal again, this time not handled, 5979 so its normal effect occurs. */ 5980 kill (getpid (), signum); 5981 } 5982 5983 /* Compare the contents of the two files named CMPFILE[0] and 5984 CMPFILE[1]. Return zero if they're identical, nonzero 5985 otherwise. */ 5986 5987 static int 5988 compare_files (char *cmpfile[]) 5989 { 5990 int ret = 0; 5991 FILE *temp[2] = { NULL, NULL }; 5992 int i; 5993 5994 #if HAVE_MMAP_FILE 5995 { 5996 size_t length[2]; 5997 void *map[2] = { NULL, NULL }; 5998 5999 for (i = 0; i < 2; i++) 6000 { 6001 struct stat st; 6002 6003 if (stat (cmpfile[i], &st) < 0 || !S_ISREG (st.st_mode)) 6004 { 6005 error ("%s: could not determine length of compare-debug file %s", 6006 gcc_input_filename, cmpfile[i]); 6007 ret = 1; 6008 break; 6009 } 6010 6011 length[i] = st.st_size; 6012 } 6013 6014 if (!ret && length[0] != length[1]) 6015 { 6016 error ("%s: -fcompare-debug failure (length)", gcc_input_filename); 6017 ret = 1; 6018 } 6019 6020 if (!ret) 6021 for (i = 0; i < 2; i++) 6022 { 6023 int fd = open (cmpfile[i], O_RDONLY); 6024 if (fd < 0) 6025 { 6026 error ("%s: could not open compare-debug file %s", 6027 gcc_input_filename, cmpfile[i]); 6028 ret = 1; 6029 break; 6030 } 6031 6032 map[i] = mmap (NULL, length[i], PROT_READ, MAP_PRIVATE, fd, 0); 6033 close (fd); 6034 6035 if (map[i] == (void *) MAP_FAILED) 6036 { 6037 ret = -1; 6038 break; 6039 } 6040 } 6041 6042 if (!ret) 6043 { 6044 if (memcmp (map[0], map[1], length[0]) != 0) 6045 { 6046 error ("%s: -fcompare-debug failure", gcc_input_filename); 6047 ret = 1; 6048 } 6049 } 6050 6051 for (i = 0; i < 2; i++) 6052 if (map[i]) 6053 munmap ((caddr_t) map[i], length[i]); 6054 6055 if (ret >= 0) 6056 return ret; 6057 6058 ret = 0; 6059 } 6060 #endif 6061 6062 for (i = 0; i < 2; i++) 6063 { 6064 temp[i] = fopen (cmpfile[i], "r"); 6065 if (!temp[i]) 6066 { 6067 error ("%s: could not open compare-debug file %s", 6068 gcc_input_filename, cmpfile[i]); 6069 ret = 1; 6070 break; 6071 } 6072 } 6073 6074 if (!ret && temp[0] && temp[1]) 6075 for (;;) 6076 { 6077 int c0, c1; 6078 c0 = fgetc (temp[0]); 6079 c1 = fgetc (temp[1]); 6080 6081 if (c0 != c1) 6082 { 6083 error ("%s: -fcompare-debug failure", 6084 gcc_input_filename); 6085 ret = 1; 6086 break; 6087 } 6088 6089 if (c0 == EOF) 6090 break; 6091 } 6092 6093 for (i = 1; i >= 0; i--) 6094 { 6095 if (temp[i]) 6096 fclose (temp[i]); 6097 } 6098 6099 return ret; 6100 } 6101 6102 extern int main (int, char **); 6103 6104 int 6105 main (int argc, char **argv) 6106 { 6107 size_t i; 6108 int value; 6109 int linker_was_run = 0; 6110 int lang_n_infiles = 0; 6111 int num_linker_inputs = 0; 6112 char *explicit_link_files; 6113 char *specs_file; 6114 char *lto_wrapper_file; 6115 const char *p; 6116 struct user_specs *uptr; 6117 char **old_argv = argv; 6118 struct cl_decoded_option *decoded_options; 6119 unsigned int decoded_options_count; 6120 6121 /* Initialize here, not in definition. The IRIX 6 O32 cc sometimes chokes 6122 on ?: in file-scope variable initializations. */ 6123 asm_debug = ASM_DEBUG_SPEC; 6124 6125 p = argv[0] + strlen (argv[0]); 6126 while (p != argv[0] && !IS_DIR_SEPARATOR (p[-1])) 6127 --p; 6128 progname = p; 6129 6130 xmalloc_set_program_name (progname); 6131 6132 expandargv (&argc, &argv); 6133 6134 /* Determine if any expansions were made. */ 6135 if (argv != old_argv) 6136 at_file_supplied = true; 6137 6138 /* Register the language-independent parameters. */ 6139 global_init_params (); 6140 finish_params (); 6141 6142 init_options_struct (&global_options, &global_options_set); 6143 6144 decode_cmdline_options_to_array (argc, CONST_CAST2 (const char **, char **, 6145 argv), 6146 CL_DRIVER, 6147 &decoded_options, &decoded_options_count); 6148 6149 #ifdef GCC_DRIVER_HOST_INITIALIZATION 6150 /* Perform host dependent initialization when needed. */ 6151 GCC_DRIVER_HOST_INITIALIZATION; 6152 #endif 6153 6154 /* Unlock the stdio streams. */ 6155 unlock_std_streams (); 6156 6157 gcc_init_libintl (); 6158 6159 diagnostic_initialize (global_dc, 0); 6160 if (atexit (delete_temp_files) != 0) 6161 fatal_error ("atexit failed"); 6162 6163 if (signal (SIGINT, SIG_IGN) != SIG_IGN) 6164 signal (SIGINT, fatal_signal); 6165 #ifdef SIGHUP 6166 if (signal (SIGHUP, SIG_IGN) != SIG_IGN) 6167 signal (SIGHUP, fatal_signal); 6168 #endif 6169 if (signal (SIGTERM, SIG_IGN) != SIG_IGN) 6170 signal (SIGTERM, fatal_signal); 6171 #ifdef SIGPIPE 6172 if (signal (SIGPIPE, SIG_IGN) != SIG_IGN) 6173 signal (SIGPIPE, fatal_signal); 6174 #endif 6175 #ifdef SIGCHLD 6176 /* We *MUST* set SIGCHLD to SIG_DFL so that the wait4() call will 6177 receive the signal. A different setting is inheritable */ 6178 signal (SIGCHLD, SIG_DFL); 6179 #endif 6180 6181 /* Parsing and gimplification sometimes need quite large stack. 6182 Increase stack size limits if possible. */ 6183 stack_limit_increase (64 * 1024 * 1024); 6184 6185 /* Allocate the argument vector. */ 6186 alloc_args (); 6187 6188 obstack_init (&obstack); 6189 6190 /* Build multilib_select, et. al from the separate lines that make up each 6191 multilib selection. */ 6192 { 6193 const char *const *q = multilib_raw; 6194 int need_space; 6195 6196 obstack_init (&multilib_obstack); 6197 while ((p = *q++) != (char *) 0) 6198 obstack_grow (&multilib_obstack, p, strlen (p)); 6199 6200 obstack_1grow (&multilib_obstack, 0); 6201 multilib_select = XOBFINISH (&multilib_obstack, const char *); 6202 6203 q = multilib_matches_raw; 6204 while ((p = *q++) != (char *) 0) 6205 obstack_grow (&multilib_obstack, p, strlen (p)); 6206 6207 obstack_1grow (&multilib_obstack, 0); 6208 multilib_matches = XOBFINISH (&multilib_obstack, const char *); 6209 6210 q = multilib_exclusions_raw; 6211 while ((p = *q++) != (char *) 0) 6212 obstack_grow (&multilib_obstack, p, strlen (p)); 6213 6214 obstack_1grow (&multilib_obstack, 0); 6215 multilib_exclusions = XOBFINISH (&multilib_obstack, const char *); 6216 6217 need_space = FALSE; 6218 for (i = 0; i < ARRAY_SIZE (multilib_defaults_raw); i++) 6219 { 6220 if (need_space) 6221 obstack_1grow (&multilib_obstack, ' '); 6222 obstack_grow (&multilib_obstack, 6223 multilib_defaults_raw[i], 6224 strlen (multilib_defaults_raw[i])); 6225 need_space = TRUE; 6226 } 6227 6228 obstack_1grow (&multilib_obstack, 0); 6229 multilib_defaults = XOBFINISH (&multilib_obstack, const char *); 6230 } 6231 6232 #ifdef INIT_ENVIRONMENT 6233 /* Set up any other necessary machine specific environment variables. */ 6234 xputenv (INIT_ENVIRONMENT); 6235 #endif 6236 6237 /* Make a table of what switches there are (switches, n_switches). 6238 Make a table of specified input files (infiles, n_infiles). 6239 Decode switches that are handled locally. */ 6240 6241 process_command (decoded_options_count, decoded_options); 6242 6243 /* Initialize the vector of specs to just the default. 6244 This means one element containing 0s, as a terminator. */ 6245 6246 compilers = XNEWVAR (struct compiler, sizeof default_compilers); 6247 memcpy (compilers, default_compilers, sizeof default_compilers); 6248 n_compilers = n_default_compilers; 6249 6250 /* Read specs from a file if there is one. */ 6251 6252 machine_suffix = concat (spec_machine, dir_separator_str, 6253 spec_version, dir_separator_str, NULL); 6254 just_machine_suffix = concat (spec_machine, dir_separator_str, NULL); 6255 6256 specs_file = find_a_file (&startfile_prefixes, "specs", R_OK, true); 6257 /* Read the specs file unless it is a default one. */ 6258 if (specs_file != 0 && strcmp (specs_file, "specs")) 6259 read_specs (specs_file, TRUE); 6260 else 6261 init_spec (); 6262 6263 /* We need to check standard_exec_prefix/just_machine_suffix/specs 6264 for any override of as, ld and libraries. */ 6265 specs_file = (char *) alloca (strlen (standard_exec_prefix) 6266 + strlen (just_machine_suffix) + sizeof ("specs")); 6267 6268 strcpy (specs_file, standard_exec_prefix); 6269 strcat (specs_file, just_machine_suffix); 6270 strcat (specs_file, "specs"); 6271 if (access (specs_file, R_OK) == 0) 6272 read_specs (specs_file, TRUE); 6273 6274 /* Process any configure-time defaults specified for the command line 6275 options, via OPTION_DEFAULT_SPECS. */ 6276 for (i = 0; i < ARRAY_SIZE (option_default_specs); i++) 6277 do_option_spec (option_default_specs[i].name, 6278 option_default_specs[i].spec); 6279 6280 /* Process DRIVER_SELF_SPECS, adding any new options to the end 6281 of the command line. */ 6282 6283 for (i = 0; i < ARRAY_SIZE (driver_self_specs); i++) 6284 do_self_spec (driver_self_specs[i]); 6285 6286 /* If not cross-compiling, look for executables in the standard 6287 places. */ 6288 if (*cross_compile == '0') 6289 { 6290 if (*md_exec_prefix) 6291 { 6292 add_prefix (&exec_prefixes, md_exec_prefix, "GCC", 6293 PREFIX_PRIORITY_LAST, 0, 0); 6294 } 6295 } 6296 6297 /* Process sysroot_suffix_spec. */ 6298 if (*sysroot_suffix_spec != 0 6299 && do_spec_2 (sysroot_suffix_spec) == 0) 6300 { 6301 if (VEC_length (const_char_p, argbuf) > 1) 6302 error ("spec failure: more than one arg to SYSROOT_SUFFIX_SPEC"); 6303 else if (VEC_length (const_char_p, argbuf) == 1) 6304 target_sysroot_suffix = xstrdup (VEC_last (const_char_p, argbuf)); 6305 } 6306 6307 #ifdef HAVE_LD_SYSROOT 6308 /* Pass the --sysroot option to the linker, if it supports that. If 6309 there is a sysroot_suffix_spec, it has already been processed by 6310 this point, so target_system_root really is the system root we 6311 should be using. */ 6312 if (target_system_root) 6313 { 6314 obstack_grow (&obstack, "%(sysroot_spec) ", strlen ("%(sysroot_spec) ")); 6315 obstack_grow0 (&obstack, link_spec, strlen (link_spec)); 6316 set_spec ("link", XOBFINISH (&obstack, const char *)); 6317 } 6318 #endif 6319 6320 /* Process sysroot_hdrs_suffix_spec. */ 6321 if (*sysroot_hdrs_suffix_spec != 0 6322 && do_spec_2 (sysroot_hdrs_suffix_spec) == 0) 6323 { 6324 if (VEC_length (const_char_p, argbuf) > 1) 6325 error ("spec failure: more than one arg to SYSROOT_HEADERS_SUFFIX_SPEC"); 6326 else if (VEC_length (const_char_p, argbuf) == 1) 6327 target_sysroot_hdrs_suffix = xstrdup (VEC_last (const_char_p, argbuf)); 6328 } 6329 6330 /* Look for startfiles in the standard places. */ 6331 if (*startfile_prefix_spec != 0 6332 && do_spec_2 (startfile_prefix_spec) == 0 6333 && do_spec_1 (" ", 0, NULL) == 0) 6334 { 6335 const char *arg; 6336 int ndx; 6337 FOR_EACH_VEC_ELT (const_char_p, argbuf, ndx, arg) 6338 add_sysrooted_prefix (&startfile_prefixes, arg, "BINUTILS", 6339 PREFIX_PRIORITY_LAST, 0, 1); 6340 } 6341 /* We should eventually get rid of all these and stick to 6342 startfile_prefix_spec exclusively. */ 6343 else if (*cross_compile == '0' || target_system_root) 6344 { 6345 if (*md_startfile_prefix) 6346 add_sysrooted_prefix (&startfile_prefixes, md_startfile_prefix, 6347 "GCC", PREFIX_PRIORITY_LAST, 0, 1); 6348 6349 if (*md_startfile_prefix_1) 6350 add_sysrooted_prefix (&startfile_prefixes, md_startfile_prefix_1, 6351 "GCC", PREFIX_PRIORITY_LAST, 0, 1); 6352 6353 /* If standard_startfile_prefix is relative, base it on 6354 standard_exec_prefix. This lets us move the installed tree 6355 as a unit. If GCC_EXEC_PREFIX is defined, base 6356 standard_startfile_prefix on that as well. 6357 6358 If the prefix is relative, only search it for native compilers; 6359 otherwise we will search a directory containing host libraries. */ 6360 if (IS_ABSOLUTE_PATH (standard_startfile_prefix)) 6361 add_sysrooted_prefix (&startfile_prefixes, 6362 standard_startfile_prefix, "BINUTILS", 6363 PREFIX_PRIORITY_LAST, 0, 1); 6364 else if (*cross_compile == '0') 6365 { 6366 add_prefix (&startfile_prefixes, 6367 concat (gcc_exec_prefix 6368 ? gcc_exec_prefix : standard_exec_prefix, 6369 machine_suffix, 6370 standard_startfile_prefix, NULL), 6371 NULL, PREFIX_PRIORITY_LAST, 0, 1); 6372 } 6373 6374 /* Sysrooted prefixes are relocated because target_system_root is 6375 also relocated by gcc_exec_prefix. */ 6376 if (*standard_startfile_prefix_1) 6377 add_sysrooted_prefix (&startfile_prefixes, 6378 standard_startfile_prefix_1, "BINUTILS", 6379 PREFIX_PRIORITY_LAST, 0, 1); 6380 if (*standard_startfile_prefix_2) 6381 add_sysrooted_prefix (&startfile_prefixes, 6382 standard_startfile_prefix_2, "BINUTILS", 6383 PREFIX_PRIORITY_LAST, 0, 1); 6384 } 6385 6386 /* Process any user specified specs in the order given on the command 6387 line. */ 6388 for (uptr = user_specs_head; uptr; uptr = uptr->next) 6389 { 6390 char *filename = find_a_file (&startfile_prefixes, uptr->filename, 6391 R_OK, true); 6392 read_specs (filename ? filename : uptr->filename, FALSE); 6393 } 6394 6395 /* Process any user self specs. */ 6396 { 6397 struct spec_list *sl; 6398 for (sl = specs; sl; sl = sl->next) 6399 if (sl->name_len == sizeof "self_spec" - 1 6400 && !strcmp (sl->name, "self_spec")) 6401 do_self_spec (*sl->ptr_spec); 6402 } 6403 6404 if (compare_debug) 6405 { 6406 enum save_temps save; 6407 6408 if (!compare_debug_second) 6409 { 6410 n_switches_debug_check[1] = n_switches; 6411 n_switches_alloc_debug_check[1] = n_switches_alloc; 6412 switches_debug_check[1] = XDUPVEC (struct switchstr, switches, 6413 n_switches_alloc); 6414 6415 do_self_spec ("%:compare-debug-self-opt()"); 6416 n_switches_debug_check[0] = n_switches; 6417 n_switches_alloc_debug_check[0] = n_switches_alloc; 6418 switches_debug_check[0] = switches; 6419 6420 n_switches = n_switches_debug_check[1]; 6421 n_switches_alloc = n_switches_alloc_debug_check[1]; 6422 switches = switches_debug_check[1]; 6423 } 6424 6425 /* Avoid crash when computing %j in this early. */ 6426 save = save_temps_flag; 6427 save_temps_flag = SAVE_TEMPS_NONE; 6428 6429 compare_debug = -compare_debug; 6430 do_self_spec ("%:compare-debug-self-opt()"); 6431 6432 save_temps_flag = save; 6433 6434 if (!compare_debug_second) 6435 { 6436 n_switches_debug_check[1] = n_switches; 6437 n_switches_alloc_debug_check[1] = n_switches_alloc; 6438 switches_debug_check[1] = switches; 6439 compare_debug = -compare_debug; 6440 n_switches = n_switches_debug_check[0]; 6441 n_switches_alloc = n_switches_debug_check[0]; 6442 switches = switches_debug_check[0]; 6443 } 6444 } 6445 6446 6447 /* If we have a GCC_EXEC_PREFIX envvar, modify it for cpp's sake. */ 6448 if (gcc_exec_prefix) 6449 gcc_exec_prefix = concat (gcc_exec_prefix, spec_machine, dir_separator_str, 6450 spec_version, dir_separator_str, NULL); 6451 6452 /* Now we have the specs. 6453 Set the `valid' bits for switches that match anything in any spec. */ 6454 6455 validate_all_switches (); 6456 6457 /* Now that we have the switches and the specs, set 6458 the subdirectory based on the options. */ 6459 set_multilib_dir (); 6460 6461 /* Set up to remember the pathname of gcc and any options 6462 needed for collect. We use argv[0] instead of progname because 6463 we need the complete pathname. */ 6464 obstack_init (&collect_obstack); 6465 obstack_grow (&collect_obstack, "COLLECT_GCC=", sizeof ("COLLECT_GCC=") - 1); 6466 obstack_grow (&collect_obstack, argv[0], strlen (argv[0]) + 1); 6467 xputenv (XOBFINISH (&collect_obstack, char *)); 6468 6469 /* Set up to remember the pathname of the lto wrapper. */ 6470 6471 if (have_c) 6472 lto_wrapper_file = NULL; 6473 else 6474 lto_wrapper_file = find_a_file (&exec_prefixes, "lto-wrapper", 6475 X_OK, false); 6476 if (lto_wrapper_file) 6477 { 6478 lto_wrapper_spec = lto_wrapper_file; 6479 obstack_init (&collect_obstack); 6480 obstack_grow (&collect_obstack, "COLLECT_LTO_WRAPPER=", 6481 sizeof ("COLLECT_LTO_WRAPPER=") - 1); 6482 obstack_grow (&collect_obstack, lto_wrapper_spec, 6483 strlen (lto_wrapper_spec) + 1); 6484 xputenv (XOBFINISH (&collect_obstack, char *)); 6485 } 6486 6487 /* Warn about any switches that no pass was interested in. */ 6488 6489 for (i = 0; (int) i < n_switches; i++) 6490 if (! switches[i].validated) 6491 error ("unrecognized option %<-%s%>", switches[i].part1); 6492 6493 /* Obey some of the options. */ 6494 6495 if (print_search_dirs) 6496 { 6497 printf (_("install: %s%s\n"), 6498 gcc_exec_prefix ? gcc_exec_prefix : standard_exec_prefix, 6499 gcc_exec_prefix ? "" : machine_suffix); 6500 printf (_("programs: %s\n"), 6501 build_search_list (&exec_prefixes, "", false, false)); 6502 printf (_("libraries: %s\n"), 6503 build_search_list (&startfile_prefixes, "", false, true)); 6504 return (0); 6505 } 6506 6507 if (print_file_name) 6508 { 6509 printf ("%s\n", find_file (print_file_name)); 6510 return (0); 6511 } 6512 6513 if (print_prog_name) 6514 { 6515 char *newname = find_a_file (&exec_prefixes, print_prog_name, X_OK, 0); 6516 printf ("%s\n", (newname ? newname : print_prog_name)); 6517 return (0); 6518 } 6519 6520 if (print_multi_lib) 6521 { 6522 print_multilib_info (); 6523 return (0); 6524 } 6525 6526 if (print_multi_directory) 6527 { 6528 if (multilib_dir == NULL) 6529 printf (".\n"); 6530 else 6531 printf ("%s\n", multilib_dir); 6532 return (0); 6533 } 6534 6535 if (print_sysroot) 6536 { 6537 if (target_system_root) 6538 { 6539 if (target_sysroot_suffix) 6540 printf ("%s%s\n", target_system_root, target_sysroot_suffix); 6541 else 6542 printf ("%s\n", target_system_root); 6543 } 6544 return (0); 6545 } 6546 6547 if (print_multi_os_directory) 6548 { 6549 if (multilib_os_dir == NULL) 6550 printf (".\n"); 6551 else 6552 printf ("%s\n", multilib_os_dir); 6553 return (0); 6554 } 6555 6556 if (print_sysroot_headers_suffix) 6557 { 6558 if (*sysroot_hdrs_suffix_spec) 6559 { 6560 printf("%s\n", (target_sysroot_hdrs_suffix 6561 ? target_sysroot_hdrs_suffix 6562 : "")); 6563 return (0); 6564 } 6565 else 6566 /* The error status indicates that only one set of fixed 6567 headers should be built. */ 6568 fatal_error ("not configured with sysroot headers suffix"); 6569 } 6570 6571 if (print_help_list) 6572 { 6573 display_help (); 6574 6575 if (! verbose_flag) 6576 { 6577 printf (_("\nFor bug reporting instructions, please see:\n")); 6578 printf ("%s.\n", bug_report_url); 6579 6580 return (0); 6581 } 6582 6583 /* We do not exit here. Instead we have created a fake input file 6584 called 'help-dummy' which needs to be compiled, and we pass this 6585 on the various sub-processes, along with the --help switch. 6586 Ensure their output appears after ours. */ 6587 fputc ('\n', stdout); 6588 fflush (stdout); 6589 } 6590 6591 if (print_version) 6592 { 6593 printf (_("%s %s%s\n"), progname, pkgversion_string, 6594 version_string); 6595 printf ("Copyright %s 2012 Free Software Foundation, Inc.\n", 6596 _("(C)")); 6597 fputs (_("This is free software; see the source for copying conditions. There is NO\n\ 6598 warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n\n"), 6599 stdout); 6600 if (! verbose_flag) 6601 return 0; 6602 6603 /* We do not exit here. We use the same mechanism of --help to print 6604 the version of the sub-processes. */ 6605 fputc ('\n', stdout); 6606 fflush (stdout); 6607 } 6608 6609 if (verbose_flag) 6610 { 6611 int n; 6612 const char *thrmod; 6613 6614 fnotice (stderr, "Target: %s\n", spec_machine); 6615 fnotice (stderr, "Configured with: %s\n", configuration_arguments); 6616 6617 #ifdef THREAD_MODEL_SPEC 6618 /* We could have defined THREAD_MODEL_SPEC to "%*" by default, 6619 but there's no point in doing all this processing just to get 6620 thread_model back. */ 6621 obstack_init (&obstack); 6622 do_spec_1 (THREAD_MODEL_SPEC, 0, thread_model); 6623 obstack_1grow (&obstack, '\0'); 6624 thrmod = XOBFINISH (&obstack, const char *); 6625 #else 6626 thrmod = thread_model; 6627 #endif 6628 6629 fnotice (stderr, "Thread model: %s\n", thrmod); 6630 6631 /* compiler_version is truncated at the first space when initialized 6632 from version string, so truncate version_string at the first space 6633 before comparing. */ 6634 for (n = 0; version_string[n]; n++) 6635 if (version_string[n] == ' ') 6636 break; 6637 6638 if (! strncmp (version_string, compiler_version, n) 6639 && compiler_version[n] == 0) 6640 fnotice (stderr, "gcc version %s %s\n", version_string, 6641 pkgversion_string); 6642 else 6643 fnotice (stderr, "gcc driver version %s %sexecuting gcc version %s\n", 6644 version_string, pkgversion_string, compiler_version); 6645 6646 if (n_infiles == 0) 6647 return (0); 6648 } 6649 6650 if (n_infiles == added_libraries) 6651 fatal_error ("no input files"); 6652 6653 if (seen_error ()) 6654 goto out; 6655 6656 /* Make a place to record the compiler output file names 6657 that correspond to the input files. */ 6658 6659 i = n_infiles; 6660 i += lang_specific_extra_outfiles; 6661 outfiles = XCNEWVEC (const char *, i); 6662 6663 /* Record which files were specified explicitly as link input. */ 6664 6665 explicit_link_files = XCNEWVEC (char, n_infiles); 6666 6667 combine_inputs = have_o || flag_wpa; 6668 6669 for (i = 0; (int) i < n_infiles; i++) 6670 { 6671 const char *name = infiles[i].name; 6672 struct compiler *compiler = lookup_compiler (name, 6673 strlen (name), 6674 infiles[i].language); 6675 6676 if (compiler && !(compiler->combinable)) 6677 combine_inputs = false; 6678 6679 if (lang_n_infiles > 0 && compiler != input_file_compiler 6680 && infiles[i].language && infiles[i].language[0] != '*') 6681 infiles[i].incompiler = compiler; 6682 else if (compiler) 6683 { 6684 lang_n_infiles++; 6685 input_file_compiler = compiler; 6686 infiles[i].incompiler = compiler; 6687 } 6688 else 6689 { 6690 /* Since there is no compiler for this input file, assume it is a 6691 linker file. */ 6692 explicit_link_files[i] = 1; 6693 infiles[i].incompiler = NULL; 6694 } 6695 infiles[i].compiled = false; 6696 infiles[i].preprocessed = false; 6697 } 6698 6699 if (!combine_inputs && have_c && have_o && lang_n_infiles > 1) 6700 fatal_error ("cannot specify -o with -c, -S or -E with multiple files"); 6701 6702 for (i = 0; (int) i < n_infiles; i++) 6703 { 6704 int this_file_error = 0; 6705 6706 /* Tell do_spec what to substitute for %i. */ 6707 6708 input_file_number = i; 6709 set_input (infiles[i].name); 6710 6711 if (infiles[i].compiled) 6712 continue; 6713 6714 /* Use the same thing in %o, unless cp->spec says otherwise. */ 6715 6716 outfiles[i] = gcc_input_filename; 6717 6718 /* Figure out which compiler from the file's suffix. */ 6719 6720 input_file_compiler 6721 = lookup_compiler (infiles[i].name, input_filename_length, 6722 infiles[i].language); 6723 6724 if (input_file_compiler) 6725 { 6726 /* Ok, we found an applicable compiler. Run its spec. */ 6727 6728 if (input_file_compiler->spec[0] == '#') 6729 { 6730 error ("%s: %s compiler not installed on this system", 6731 gcc_input_filename, &input_file_compiler->spec[1]); 6732 this_file_error = 1; 6733 } 6734 else 6735 { 6736 if (compare_debug) 6737 { 6738 free (debug_check_temp_file[0]); 6739 debug_check_temp_file[0] = NULL; 6740 6741 free (debug_check_temp_file[1]); 6742 debug_check_temp_file[1] = NULL; 6743 } 6744 6745 value = do_spec (input_file_compiler->spec); 6746 infiles[i].compiled = true; 6747 if (value < 0) 6748 this_file_error = 1; 6749 else if (compare_debug && debug_check_temp_file[0]) 6750 { 6751 if (verbose_flag) 6752 inform (0, "recompiling with -fcompare-debug"); 6753 6754 compare_debug = -compare_debug; 6755 n_switches = n_switches_debug_check[1]; 6756 n_switches_alloc = n_switches_alloc_debug_check[1]; 6757 switches = switches_debug_check[1]; 6758 6759 value = do_spec (input_file_compiler->spec); 6760 6761 compare_debug = -compare_debug; 6762 n_switches = n_switches_debug_check[0]; 6763 n_switches_alloc = n_switches_alloc_debug_check[0]; 6764 switches = switches_debug_check[0]; 6765 6766 if (value < 0) 6767 { 6768 error ("during -fcompare-debug recompilation"); 6769 this_file_error = 1; 6770 } 6771 6772 gcc_assert (debug_check_temp_file[1] 6773 && filename_cmp (debug_check_temp_file[0], 6774 debug_check_temp_file[1])); 6775 6776 if (verbose_flag) 6777 inform (0, "comparing final insns dumps"); 6778 6779 if (compare_files (debug_check_temp_file)) 6780 this_file_error = 1; 6781 } 6782 6783 if (compare_debug) 6784 { 6785 free (debug_check_temp_file[0]); 6786 debug_check_temp_file[0] = NULL; 6787 6788 free (debug_check_temp_file[1]); 6789 debug_check_temp_file[1] = NULL; 6790 } 6791 } 6792 } 6793 6794 /* If this file's name does not contain a recognized suffix, 6795 record it as explicit linker input. */ 6796 6797 else 6798 explicit_link_files[i] = 1; 6799 6800 /* Clear the delete-on-failure queue, deleting the files in it 6801 if this compilation failed. */ 6802 6803 if (this_file_error) 6804 { 6805 delete_failure_queue (); 6806 errorcount++; 6807 } 6808 /* If this compilation succeeded, don't delete those files later. */ 6809 clear_failure_queue (); 6810 } 6811 6812 /* Reset the input file name to the first compile/object file name, for use 6813 with %b in LINK_SPEC. We use the first input file that we can find 6814 a compiler to compile it instead of using infiles.language since for 6815 languages other than C we use aliases that we then lookup later. */ 6816 if (n_infiles > 0) 6817 { 6818 int i; 6819 6820 for (i = 0; i < n_infiles ; i++) 6821 if (infiles[i].incompiler 6822 || (infiles[i].language && infiles[i].language[0] != '*')) 6823 { 6824 set_input (infiles[i].name); 6825 break; 6826 } 6827 } 6828 6829 if (!seen_error ()) 6830 { 6831 /* Make sure INPUT_FILE_NUMBER points to first available open 6832 slot. */ 6833 input_file_number = n_infiles; 6834 if (lang_specific_pre_link ()) 6835 errorcount++; 6836 } 6837 6838 /* Determine if there are any linker input files. */ 6839 num_linker_inputs = 0; 6840 for (i = 0; (int) i < n_infiles; i++) 6841 if (explicit_link_files[i] || outfiles[i] != NULL) 6842 num_linker_inputs++; 6843 6844 /* Run ld to link all the compiler output files. */ 6845 6846 if (num_linker_inputs > 0 && !seen_error () && print_subprocess_help < 2) 6847 { 6848 int tmp = execution_count; 6849 6850 if (! have_c) 6851 { 6852 #if HAVE_LTO_PLUGIN > 0 6853 #if HAVE_LTO_PLUGIN == 2 6854 const char *fno_use_linker_plugin = "fno-use-linker-plugin"; 6855 #else 6856 const char *fuse_linker_plugin = "fuse-linker-plugin"; 6857 #endif 6858 #endif 6859 6860 /* We'll use ld if we can't find collect2. */ 6861 if (! strcmp (linker_name_spec, "collect2")) 6862 { 6863 char *s = find_a_file (&exec_prefixes, "collect2", X_OK, false); 6864 if (s == NULL) 6865 linker_name_spec = "ld"; 6866 } 6867 6868 #if HAVE_LTO_PLUGIN > 0 6869 #if HAVE_LTO_PLUGIN == 2 6870 if (!switch_matches (fno_use_linker_plugin, 6871 fno_use_linker_plugin 6872 + strlen (fno_use_linker_plugin), 0)) 6873 #else 6874 if (switch_matches (fuse_linker_plugin, 6875 fuse_linker_plugin 6876 + strlen (fuse_linker_plugin), 0)) 6877 #endif 6878 { 6879 linker_plugin_file_spec = find_a_file (&exec_prefixes, 6880 LTOPLUGINSONAME, R_OK, 6881 false); 6882 if (!linker_plugin_file_spec) 6883 fatal_error ("-fuse-linker-plugin, but %s not found", 6884 LTOPLUGINSONAME); 6885 } 6886 #endif 6887 lto_gcc_spec = argv[0]; 6888 } 6889 6890 /* Rebuild the COMPILER_PATH and LIBRARY_PATH environment variables 6891 for collect. */ 6892 putenv_from_prefixes (&exec_prefixes, "COMPILER_PATH", false); 6893 putenv_from_prefixes (&startfile_prefixes, LIBRARY_PATH_ENV, true); 6894 6895 if (print_subprocess_help == 1) 6896 { 6897 printf (_("\nLinker options\n==============\n\n")); 6898 printf (_("Use \"-Wl,OPTION\" to pass \"OPTION\"" 6899 " to the linker.\n\n")); 6900 fflush (stdout); 6901 } 6902 value = do_spec (link_command_spec); 6903 if (value < 0) 6904 errorcount = 1; 6905 linker_was_run = (tmp != execution_count); 6906 } 6907 6908 /* If options said don't run linker, 6909 complain about input files to be given to the linker. */ 6910 6911 if (! linker_was_run && !seen_error ()) 6912 for (i = 0; (int) i < n_infiles; i++) 6913 if (explicit_link_files[i] 6914 && !(infiles[i].language && infiles[i].language[0] == '*')) 6915 warning (0, "%s: linker input file unused because linking not done", 6916 outfiles[i]); 6917 6918 /* Delete some or all of the temporary files we made. */ 6919 6920 if (seen_error ()) 6921 delete_failure_queue (); 6922 delete_temp_files (); 6923 6924 if (print_help_list) 6925 { 6926 printf (("\nFor bug reporting instructions, please see:\n")); 6927 printf ("%s\n", bug_report_url); 6928 } 6929 6930 out: 6931 return (signal_count != 0 ? 2 6932 : seen_error () ? (pass_exit_codes ? greatest_status : 1) 6933 : 0); 6934 } 6935 6936 /* Find the proper compilation spec for the file name NAME, 6937 whose length is LENGTH. LANGUAGE is the specified language, 6938 or 0 if this file is to be passed to the linker. */ 6939 6940 static struct compiler * 6941 lookup_compiler (const char *name, size_t length, const char *language) 6942 { 6943 struct compiler *cp; 6944 6945 /* If this was specified by the user to be a linker input, indicate that. */ 6946 if (language != 0 && language[0] == '*') 6947 return 0; 6948 6949 /* Otherwise, look for the language, if one is spec'd. */ 6950 if (language != 0) 6951 { 6952 for (cp = compilers + n_compilers - 1; cp >= compilers; cp--) 6953 if (cp->suffix[0] == '@' && !strcmp (cp->suffix + 1, language)) 6954 return cp; 6955 6956 error ("language %s not recognized", language); 6957 return 0; 6958 } 6959 6960 /* Look for a suffix. */ 6961 for (cp = compilers + n_compilers - 1; cp >= compilers; cp--) 6962 { 6963 if (/* The suffix `-' matches only the file name `-'. */ 6964 (!strcmp (cp->suffix, "-") && !strcmp (name, "-")) 6965 || (strlen (cp->suffix) < length 6966 /* See if the suffix matches the end of NAME. */ 6967 && !strcmp (cp->suffix, 6968 name + length - strlen (cp->suffix)) 6969 )) 6970 break; 6971 } 6972 6973 #if defined (OS2) ||defined (HAVE_DOS_BASED_FILE_SYSTEM) 6974 /* Look again, but case-insensitively this time. */ 6975 if (cp < compilers) 6976 for (cp = compilers + n_compilers - 1; cp >= compilers; cp--) 6977 { 6978 if (/* The suffix `-' matches only the file name `-'. */ 6979 (!strcmp (cp->suffix, "-") && !strcmp (name, "-")) 6980 || (strlen (cp->suffix) < length 6981 /* See if the suffix matches the end of NAME. */ 6982 && ((!strcmp (cp->suffix, 6983 name + length - strlen (cp->suffix)) 6984 || !strpbrk (cp->suffix, "ABCDEFGHIJKLMNOPQRSTUVWXYZ")) 6985 && !strcasecmp (cp->suffix, 6986 name + length - strlen (cp->suffix))) 6987 )) 6988 break; 6989 } 6990 #endif 6991 6992 if (cp >= compilers) 6993 { 6994 if (cp->spec[0] != '@') 6995 /* A non-alias entry: return it. */ 6996 return cp; 6997 6998 /* An alias entry maps a suffix to a language. 6999 Search for the language; pass 0 for NAME and LENGTH 7000 to avoid infinite recursion if language not found. */ 7001 return lookup_compiler (NULL, 0, cp->spec + 1); 7002 } 7003 return 0; 7004 } 7005 7006 static char * 7007 save_string (const char *s, int len) 7008 { 7009 char *result = XNEWVEC (char, len + 1); 7010 7011 memcpy (result, s, len); 7012 result[len] = 0; 7013 return result; 7014 } 7015 7016 void 7017 pfatal_with_name (const char *name) 7018 { 7019 perror_with_name (name); 7020 delete_temp_files (); 7021 exit (1); 7022 } 7023 7024 static void 7025 perror_with_name (const char *name) 7026 { 7027 error ("%s: %m", name); 7028 } 7029 7030 static inline void 7031 validate_switches_from_spec (const char *spec) 7032 { 7033 const char *p = spec; 7034 char c; 7035 while ((c = *p++)) 7036 if (c == '%' && (*p == '{' || *p == '<' || (*p == 'W' && *++p == '{'))) 7037 /* We have a switch spec. */ 7038 p = validate_switches (p + 1); 7039 } 7040 7041 static void 7042 validate_all_switches (void) 7043 { 7044 struct compiler *comp; 7045 struct spec_list *spec; 7046 7047 for (comp = compilers; comp->spec; comp++) 7048 validate_switches_from_spec (comp->spec); 7049 7050 /* Look through the linked list of specs read from the specs file. */ 7051 for (spec = specs; spec; spec = spec->next) 7052 validate_switches_from_spec (*spec->ptr_spec); 7053 7054 validate_switches_from_spec (link_command_spec); 7055 } 7056 7057 /* Look at the switch-name that comes after START 7058 and mark as valid all supplied switches that match it. */ 7059 7060 static const char * 7061 validate_switches (const char *start) 7062 { 7063 const char *p = start; 7064 const char *atom; 7065 size_t len; 7066 int i; 7067 bool suffix = false; 7068 bool starred = false; 7069 7070 #define SKIP_WHITE() do { while (*p == ' ' || *p == '\t') p++; } while (0) 7071 7072 next_member: 7073 SKIP_WHITE (); 7074 7075 if (*p == '!') 7076 p++; 7077 7078 SKIP_WHITE (); 7079 if (*p == '.' || *p == ',') 7080 suffix = true, p++; 7081 7082 atom = p; 7083 while (ISIDNUM (*p) || *p == '-' || *p == '+' || *p == '=' 7084 || *p == ',' || *p == '.' || *p == '@') 7085 p++; 7086 len = p - atom; 7087 7088 if (*p == '*') 7089 starred = true, p++; 7090 7091 SKIP_WHITE (); 7092 7093 if (!suffix) 7094 { 7095 /* Mark all matching switches as valid. */ 7096 for (i = 0; i < n_switches; i++) 7097 if (!strncmp (switches[i].part1, atom, len) 7098 && (starred || switches[i].part1[len] == 0)) 7099 switches[i].validated = 1; 7100 } 7101 7102 if (*p) p++; 7103 if (*p && (p[-1] == '|' || p[-1] == '&')) 7104 goto next_member; 7105 7106 if (*p && p[-1] == ':') 7107 { 7108 while (*p && *p != ';' && *p != '}') 7109 { 7110 if (*p == '%') 7111 { 7112 p++; 7113 if (*p == '{' || *p == '<') 7114 p = validate_switches (p+1); 7115 else if (p[0] == 'W' && p[1] == '{') 7116 p = validate_switches (p+2); 7117 } 7118 else 7119 p++; 7120 } 7121 7122 if (*p) p++; 7123 if (*p && p[-1] == ';') 7124 goto next_member; 7125 } 7126 7127 return p; 7128 #undef SKIP_WHITE 7129 } 7130 7131 struct mdswitchstr 7132 { 7133 const char *str; 7134 int len; 7135 }; 7136 7137 static struct mdswitchstr *mdswitches; 7138 static int n_mdswitches; 7139 7140 /* Check whether a particular argument was used. The first time we 7141 canonicalize the switches to keep only the ones we care about. */ 7142 7143 static int 7144 used_arg (const char *p, int len) 7145 { 7146 struct mswitchstr 7147 { 7148 const char *str; 7149 const char *replace; 7150 int len; 7151 int rep_len; 7152 }; 7153 7154 static struct mswitchstr *mswitches; 7155 static int n_mswitches; 7156 int i, j; 7157 7158 if (!mswitches) 7159 { 7160 struct mswitchstr *matches; 7161 const char *q; 7162 int cnt = 0; 7163 7164 /* Break multilib_matches into the component strings of string 7165 and replacement string. */ 7166 for (q = multilib_matches; *q != '\0'; q++) 7167 if (*q == ';') 7168 cnt++; 7169 7170 matches 7171 = (struct mswitchstr *) alloca ((sizeof (struct mswitchstr)) * cnt); 7172 i = 0; 7173 q = multilib_matches; 7174 while (*q != '\0') 7175 { 7176 matches[i].str = q; 7177 while (*q != ' ') 7178 { 7179 if (*q == '\0') 7180 { 7181 invalid_matches: 7182 fatal_error ("multilib spec %qs is invalid", 7183 multilib_matches); 7184 } 7185 q++; 7186 } 7187 matches[i].len = q - matches[i].str; 7188 7189 matches[i].replace = ++q; 7190 while (*q != ';' && *q != '\0') 7191 { 7192 if (*q == ' ') 7193 goto invalid_matches; 7194 q++; 7195 } 7196 matches[i].rep_len = q - matches[i].replace; 7197 i++; 7198 if (*q == ';') 7199 q++; 7200 } 7201 7202 /* Now build a list of the replacement string for switches that we care 7203 about. Make sure we allocate at least one entry. This prevents 7204 xmalloc from calling fatal, and prevents us from re-executing this 7205 block of code. */ 7206 mswitches 7207 = XNEWVEC (struct mswitchstr, n_mdswitches + (n_switches ? n_switches : 1)); 7208 for (i = 0; i < n_switches; i++) 7209 if ((switches[i].live_cond & SWITCH_IGNORE) == 0) 7210 { 7211 int xlen = strlen (switches[i].part1); 7212 for (j = 0; j < cnt; j++) 7213 if (xlen == matches[j].len 7214 && ! strncmp (switches[i].part1, matches[j].str, xlen)) 7215 { 7216 mswitches[n_mswitches].str = matches[j].replace; 7217 mswitches[n_mswitches].len = matches[j].rep_len; 7218 mswitches[n_mswitches].replace = (char *) 0; 7219 mswitches[n_mswitches].rep_len = 0; 7220 n_mswitches++; 7221 break; 7222 } 7223 } 7224 7225 /* Add MULTILIB_DEFAULTS switches too, as long as they were not present 7226 on the command line nor any options mutually incompatible with 7227 them. */ 7228 for (i = 0; i < n_mdswitches; i++) 7229 { 7230 const char *r; 7231 7232 for (q = multilib_options; *q != '\0'; q++) 7233 { 7234 while (*q == ' ') 7235 q++; 7236 7237 r = q; 7238 while (strncmp (q, mdswitches[i].str, mdswitches[i].len) != 0 7239 || strchr (" /", q[mdswitches[i].len]) == NULL) 7240 { 7241 while (*q != ' ' && *q != '/' && *q != '\0') 7242 q++; 7243 if (*q != '/') 7244 break; 7245 q++; 7246 } 7247 7248 if (*q != ' ' && *q != '\0') 7249 { 7250 while (*r != ' ' && *r != '\0') 7251 { 7252 q = r; 7253 while (*q != ' ' && *q != '/' && *q != '\0') 7254 q++; 7255 7256 if (used_arg (r, q - r)) 7257 break; 7258 7259 if (*q != '/') 7260 { 7261 mswitches[n_mswitches].str = mdswitches[i].str; 7262 mswitches[n_mswitches].len = mdswitches[i].len; 7263 mswitches[n_mswitches].replace = (char *) 0; 7264 mswitches[n_mswitches].rep_len = 0; 7265 n_mswitches++; 7266 break; 7267 } 7268 7269 r = q + 1; 7270 } 7271 break; 7272 } 7273 } 7274 } 7275 } 7276 7277 for (i = 0; i < n_mswitches; i++) 7278 if (len == mswitches[i].len && ! strncmp (p, mswitches[i].str, len)) 7279 return 1; 7280 7281 return 0; 7282 } 7283 7284 static int 7285 default_arg (const char *p, int len) 7286 { 7287 int i; 7288 7289 for (i = 0; i < n_mdswitches; i++) 7290 if (len == mdswitches[i].len && ! strncmp (p, mdswitches[i].str, len)) 7291 return 1; 7292 7293 return 0; 7294 } 7295 7296 /* Work out the subdirectory to use based on the options. The format of 7297 multilib_select is a list of elements. Each element is a subdirectory 7298 name followed by a list of options followed by a semicolon. The format 7299 of multilib_exclusions is the same, but without the preceding 7300 directory. First gcc will check the exclusions, if none of the options 7301 beginning with an exclamation point are present, and all of the other 7302 options are present, then we will ignore this completely. Passing 7303 that, gcc will consider each multilib_select in turn using the same 7304 rules for matching the options. If a match is found, that subdirectory 7305 will be used. */ 7306 7307 static void 7308 set_multilib_dir (void) 7309 { 7310 const char *p; 7311 unsigned int this_path_len; 7312 const char *this_path, *this_arg; 7313 const char *start, *end; 7314 int not_arg; 7315 int ok, ndfltok, first; 7316 7317 n_mdswitches = 0; 7318 start = multilib_defaults; 7319 while (*start == ' ' || *start == '\t') 7320 start++; 7321 while (*start != '\0') 7322 { 7323 n_mdswitches++; 7324 while (*start != ' ' && *start != '\t' && *start != '\0') 7325 start++; 7326 while (*start == ' ' || *start == '\t') 7327 start++; 7328 } 7329 7330 if (n_mdswitches) 7331 { 7332 int i = 0; 7333 7334 mdswitches = XNEWVEC (struct mdswitchstr, n_mdswitches); 7335 for (start = multilib_defaults; *start != '\0'; start = end + 1) 7336 { 7337 while (*start == ' ' || *start == '\t') 7338 start++; 7339 7340 if (*start == '\0') 7341 break; 7342 7343 for (end = start + 1; 7344 *end != ' ' && *end != '\t' && *end != '\0'; end++) 7345 ; 7346 7347 obstack_grow (&multilib_obstack, start, end - start); 7348 obstack_1grow (&multilib_obstack, 0); 7349 mdswitches[i].str = XOBFINISH (&multilib_obstack, const char *); 7350 mdswitches[i++].len = end - start; 7351 7352 if (*end == '\0') 7353 break; 7354 } 7355 } 7356 7357 p = multilib_exclusions; 7358 while (*p != '\0') 7359 { 7360 /* Ignore newlines. */ 7361 if (*p == '\n') 7362 { 7363 ++p; 7364 continue; 7365 } 7366 7367 /* Check the arguments. */ 7368 ok = 1; 7369 while (*p != ';') 7370 { 7371 if (*p == '\0') 7372 { 7373 invalid_exclusions: 7374 fatal_error ("multilib exclusions %qs is invalid", 7375 multilib_exclusions); 7376 } 7377 7378 if (! ok) 7379 { 7380 ++p; 7381 continue; 7382 } 7383 7384 this_arg = p; 7385 while (*p != ' ' && *p != ';') 7386 { 7387 if (*p == '\0') 7388 goto invalid_exclusions; 7389 ++p; 7390 } 7391 7392 if (*this_arg != '!') 7393 not_arg = 0; 7394 else 7395 { 7396 not_arg = 1; 7397 ++this_arg; 7398 } 7399 7400 ok = used_arg (this_arg, p - this_arg); 7401 if (not_arg) 7402 ok = ! ok; 7403 7404 if (*p == ' ') 7405 ++p; 7406 } 7407 7408 if (ok) 7409 return; 7410 7411 ++p; 7412 } 7413 7414 first = 1; 7415 p = multilib_select; 7416 while (*p != '\0') 7417 { 7418 /* Ignore newlines. */ 7419 if (*p == '\n') 7420 { 7421 ++p; 7422 continue; 7423 } 7424 7425 /* Get the initial path. */ 7426 this_path = p; 7427 while (*p != ' ') 7428 { 7429 if (*p == '\0') 7430 { 7431 invalid_select: 7432 fatal_error ("multilib select %qs is invalid", 7433 multilib_select); 7434 } 7435 ++p; 7436 } 7437 this_path_len = p - this_path; 7438 7439 /* Check the arguments. */ 7440 ok = 1; 7441 ndfltok = 1; 7442 ++p; 7443 while (*p != ';') 7444 { 7445 if (*p == '\0') 7446 goto invalid_select; 7447 7448 if (! ok) 7449 { 7450 ++p; 7451 continue; 7452 } 7453 7454 this_arg = p; 7455 while (*p != ' ' && *p != ';') 7456 { 7457 if (*p == '\0') 7458 goto invalid_select; 7459 ++p; 7460 } 7461 7462 if (*this_arg != '!') 7463 not_arg = 0; 7464 else 7465 { 7466 not_arg = 1; 7467 ++this_arg; 7468 } 7469 7470 /* If this is a default argument, we can just ignore it. 7471 This is true even if this_arg begins with '!'. Beginning 7472 with '!' does not mean that this argument is necessarily 7473 inappropriate for this library: it merely means that 7474 there is a more specific library which uses this 7475 argument. If this argument is a default, we need not 7476 consider that more specific library. */ 7477 ok = used_arg (this_arg, p - this_arg); 7478 if (not_arg) 7479 ok = ! ok; 7480 7481 if (! ok) 7482 ndfltok = 0; 7483 7484 if (default_arg (this_arg, p - this_arg)) 7485 ok = 1; 7486 7487 if (*p == ' ') 7488 ++p; 7489 } 7490 7491 if (ok && first) 7492 { 7493 if (this_path_len != 1 7494 || this_path[0] != '.') 7495 { 7496 char *new_multilib_dir = XNEWVEC (char, this_path_len + 1); 7497 char *q; 7498 7499 strncpy (new_multilib_dir, this_path, this_path_len); 7500 new_multilib_dir[this_path_len] = '\0'; 7501 q = strchr (new_multilib_dir, ':'); 7502 if (q != NULL) 7503 *q = '\0'; 7504 multilib_dir = new_multilib_dir; 7505 } 7506 first = 0; 7507 } 7508 7509 if (ndfltok) 7510 { 7511 const char *q = this_path, *end = this_path + this_path_len; 7512 7513 while (q < end && *q != ':') 7514 q++; 7515 if (q < end) 7516 { 7517 char *new_multilib_os_dir = XNEWVEC (char, end - q); 7518 memcpy (new_multilib_os_dir, q + 1, end - q - 1); 7519 new_multilib_os_dir[end - q - 1] = '\0'; 7520 multilib_os_dir = new_multilib_os_dir; 7521 break; 7522 } 7523 } 7524 7525 ++p; 7526 } 7527 7528 if (multilib_dir == NULL && multilib_os_dir != NULL 7529 && strcmp (multilib_os_dir, ".") == 0) 7530 { 7531 free (CONST_CAST (char *, multilib_os_dir)); 7532 multilib_os_dir = NULL; 7533 } 7534 else if (multilib_dir != NULL && multilib_os_dir == NULL) 7535 multilib_os_dir = multilib_dir; 7536 } 7537 7538 /* Print out the multiple library subdirectory selection 7539 information. This prints out a series of lines. Each line looks 7540 like SUBDIRECTORY;@OPTION@OPTION, with as many options as is 7541 required. Only the desired options are printed out, the negative 7542 matches. The options are print without a leading dash. There are 7543 no spaces to make it easy to use the information in the shell. 7544 Each subdirectory is printed only once. This assumes the ordering 7545 generated by the genmultilib script. Also, we leave out ones that match 7546 the exclusions. */ 7547 7548 static void 7549 print_multilib_info (void) 7550 { 7551 const char *p = multilib_select; 7552 const char *last_path = 0, *this_path; 7553 int skip; 7554 unsigned int last_path_len = 0; 7555 7556 while (*p != '\0') 7557 { 7558 skip = 0; 7559 /* Ignore newlines. */ 7560 if (*p == '\n') 7561 { 7562 ++p; 7563 continue; 7564 } 7565 7566 /* Get the initial path. */ 7567 this_path = p; 7568 while (*p != ' ') 7569 { 7570 if (*p == '\0') 7571 { 7572 invalid_select: 7573 fatal_error ("multilib select %qs is invalid", multilib_select); 7574 } 7575 7576 ++p; 7577 } 7578 7579 /* When --disable-multilib was used but target defines 7580 MULTILIB_OSDIRNAMES, entries starting with .: are there just 7581 to find multilib_os_dir, so skip them from output. */ 7582 if (this_path[0] == '.' && this_path[1] == ':') 7583 skip = 1; 7584 7585 /* Check for matches with the multilib_exclusions. We don't bother 7586 with the '!' in either list. If any of the exclusion rules match 7587 all of its options with the select rule, we skip it. */ 7588 { 7589 const char *e = multilib_exclusions; 7590 const char *this_arg; 7591 7592 while (*e != '\0') 7593 { 7594 int m = 1; 7595 /* Ignore newlines. */ 7596 if (*e == '\n') 7597 { 7598 ++e; 7599 continue; 7600 } 7601 7602 /* Check the arguments. */ 7603 while (*e != ';') 7604 { 7605 const char *q; 7606 int mp = 0; 7607 7608 if (*e == '\0') 7609 { 7610 invalid_exclusion: 7611 fatal_error ("multilib exclusion %qs is invalid", 7612 multilib_exclusions); 7613 } 7614 7615 if (! m) 7616 { 7617 ++e; 7618 continue; 7619 } 7620 7621 this_arg = e; 7622 7623 while (*e != ' ' && *e != ';') 7624 { 7625 if (*e == '\0') 7626 goto invalid_exclusion; 7627 ++e; 7628 } 7629 7630 q = p + 1; 7631 while (*q != ';') 7632 { 7633 const char *arg; 7634 int len = e - this_arg; 7635 7636 if (*q == '\0') 7637 goto invalid_select; 7638 7639 arg = q; 7640 7641 while (*q != ' ' && *q != ';') 7642 { 7643 if (*q == '\0') 7644 goto invalid_select; 7645 ++q; 7646 } 7647 7648 if (! strncmp (arg, this_arg, 7649 (len < q - arg) ? q - arg : len) 7650 || default_arg (this_arg, e - this_arg)) 7651 { 7652 mp = 1; 7653 break; 7654 } 7655 7656 if (*q == ' ') 7657 ++q; 7658 } 7659 7660 if (! mp) 7661 m = 0; 7662 7663 if (*e == ' ') 7664 ++e; 7665 } 7666 7667 if (m) 7668 { 7669 skip = 1; 7670 break; 7671 } 7672 7673 if (*e != '\0') 7674 ++e; 7675 } 7676 } 7677 7678 if (! skip) 7679 { 7680 /* If this is a duplicate, skip it. */ 7681 skip = (last_path != 0 7682 && (unsigned int) (p - this_path) == last_path_len 7683 && ! filename_ncmp (last_path, this_path, last_path_len)); 7684 7685 last_path = this_path; 7686 last_path_len = p - this_path; 7687 } 7688 7689 /* If this directory requires any default arguments, we can skip 7690 it. We will already have printed a directory identical to 7691 this one which does not require that default argument. */ 7692 if (! skip) 7693 { 7694 const char *q; 7695 7696 q = p + 1; 7697 while (*q != ';') 7698 { 7699 const char *arg; 7700 7701 if (*q == '\0') 7702 goto invalid_select; 7703 7704 if (*q == '!') 7705 arg = NULL; 7706 else 7707 arg = q; 7708 7709 while (*q != ' ' && *q != ';') 7710 { 7711 if (*q == '\0') 7712 goto invalid_select; 7713 ++q; 7714 } 7715 7716 if (arg != NULL 7717 && default_arg (arg, q - arg)) 7718 { 7719 skip = 1; 7720 break; 7721 } 7722 7723 if (*q == ' ') 7724 ++q; 7725 } 7726 } 7727 7728 if (! skip) 7729 { 7730 const char *p1; 7731 7732 for (p1 = last_path; p1 < p && *p1 != ':'; p1++) 7733 putchar (*p1); 7734 putchar (';'); 7735 } 7736 7737 ++p; 7738 while (*p != ';') 7739 { 7740 int use_arg; 7741 7742 if (*p == '\0') 7743 goto invalid_select; 7744 7745 if (skip) 7746 { 7747 ++p; 7748 continue; 7749 } 7750 7751 use_arg = *p != '!'; 7752 7753 if (use_arg) 7754 putchar ('@'); 7755 7756 while (*p != ' ' && *p != ';') 7757 { 7758 if (*p == '\0') 7759 goto invalid_select; 7760 if (use_arg) 7761 putchar (*p); 7762 ++p; 7763 } 7764 7765 if (*p == ' ') 7766 ++p; 7767 } 7768 7769 if (! skip) 7770 { 7771 /* If there are extra options, print them now. */ 7772 if (multilib_extra && *multilib_extra) 7773 { 7774 int print_at = TRUE; 7775 const char *q; 7776 7777 for (q = multilib_extra; *q != '\0'; q++) 7778 { 7779 if (*q == ' ') 7780 print_at = TRUE; 7781 else 7782 { 7783 if (print_at) 7784 putchar ('@'); 7785 putchar (*q); 7786 print_at = FALSE; 7787 } 7788 } 7789 } 7790 7791 putchar ('\n'); 7792 } 7793 7794 ++p; 7795 } 7796 } 7797 7798 /* getenv built-in spec function. 7799 7800 Returns the value of the environment variable given by its first 7801 argument, concatenated with the second argument. If the 7802 environment variable is not defined, a fatal error is issued. */ 7803 7804 static const char * 7805 getenv_spec_function (int argc, const char **argv) 7806 { 7807 char *value; 7808 char *result; 7809 char *ptr; 7810 size_t len; 7811 7812 if (argc != 2) 7813 return NULL; 7814 7815 value = getenv (argv[0]); 7816 if (!value) 7817 fatal_error ("environment variable %qs not defined", argv[0]); 7818 7819 /* We have to escape every character of the environment variable so 7820 they are not interpreted as active spec characters. A 7821 particularly painful case is when we are reading a variable 7822 holding a windows path complete with \ separators. */ 7823 len = strlen (value) * 2 + strlen (argv[1]) + 1; 7824 result = XNEWVAR (char, len); 7825 for (ptr = result; *value; ptr += 2) 7826 { 7827 ptr[0] = '\\'; 7828 ptr[1] = *value++; 7829 } 7830 7831 strcpy (ptr, argv[1]); 7832 7833 return result; 7834 } 7835 7836 /* if-exists built-in spec function. 7837 7838 Checks to see if the file specified by the absolute pathname in 7839 ARGS exists. Returns that pathname if found. 7840 7841 The usual use for this function is to check for a library file 7842 (whose name has been expanded with %s). */ 7843 7844 static const char * 7845 if_exists_spec_function (int argc, const char **argv) 7846 { 7847 /* Must have only one argument. */ 7848 if (argc == 1 && IS_ABSOLUTE_PATH (argv[0]) && ! access (argv[0], R_OK)) 7849 return argv[0]; 7850 7851 return NULL; 7852 } 7853 7854 /* if-exists-else built-in spec function. 7855 7856 This is like if-exists, but takes an additional argument which 7857 is returned if the first argument does not exist. */ 7858 7859 static const char * 7860 if_exists_else_spec_function (int argc, const char **argv) 7861 { 7862 /* Must have exactly two arguments. */ 7863 if (argc != 2) 7864 return NULL; 7865 7866 if (IS_ABSOLUTE_PATH (argv[0]) && ! access (argv[0], R_OK)) 7867 return argv[0]; 7868 7869 return argv[1]; 7870 } 7871 7872 /* replace-outfile built-in spec function. 7873 7874 This looks for the first argument in the outfiles array's name and 7875 replaces it with the second argument. */ 7876 7877 static const char * 7878 replace_outfile_spec_function (int argc, const char **argv) 7879 { 7880 int i; 7881 /* Must have exactly two arguments. */ 7882 if (argc != 2) 7883 abort (); 7884 7885 for (i = 0; i < n_infiles; i++) 7886 { 7887 if (outfiles[i] && !filename_cmp (outfiles[i], argv[0])) 7888 outfiles[i] = xstrdup (argv[1]); 7889 } 7890 return NULL; 7891 } 7892 7893 /* remove-outfile built-in spec function. 7894 * 7895 * This looks for the first argument in the outfiles array's name and 7896 * removes it. */ 7897 7898 static const char * 7899 remove_outfile_spec_function (int argc, const char **argv) 7900 { 7901 int i; 7902 /* Must have exactly one argument. */ 7903 if (argc != 1) 7904 abort (); 7905 7906 for (i = 0; i < n_infiles; i++) 7907 { 7908 if (outfiles[i] && !filename_cmp (outfiles[i], argv[0])) 7909 outfiles[i] = NULL; 7910 } 7911 return NULL; 7912 } 7913 7914 /* Given two version numbers, compares the two numbers. 7915 A version number must match the regular expression 7916 ([1-9][0-9]*|0)(\.([1-9][0-9]*|0))* 7917 */ 7918 static int 7919 compare_version_strings (const char *v1, const char *v2) 7920 { 7921 int rresult; 7922 regex_t r; 7923 7924 if (regcomp (&r, "^([1-9][0-9]*|0)(\\.([1-9][0-9]*|0))*$", 7925 REG_EXTENDED | REG_NOSUB) != 0) 7926 abort (); 7927 rresult = regexec (&r, v1, 0, NULL, 0); 7928 if (rresult == REG_NOMATCH) 7929 fatal_error ("invalid version number %qs", v1); 7930 else if (rresult != 0) 7931 abort (); 7932 rresult = regexec (&r, v2, 0, NULL, 0); 7933 if (rresult == REG_NOMATCH) 7934 fatal_error ("invalid version number %qs", v2); 7935 else if (rresult != 0) 7936 abort (); 7937 7938 return strverscmp (v1, v2); 7939 } 7940 7941 7942 /* version_compare built-in spec function. 7943 7944 This takes an argument of the following form: 7945 7946 <comparison-op> <arg1> [<arg2>] <switch> <result> 7947 7948 and produces "result" if the comparison evaluates to true, 7949 and nothing if it doesn't. 7950 7951 The supported <comparison-op> values are: 7952 7953 >= true if switch is a later (or same) version than arg1 7954 !> opposite of >= 7955 < true if switch is an earlier version than arg1 7956 !< opposite of < 7957 >< true if switch is arg1 or later, and earlier than arg2 7958 <> true if switch is earlier than arg1 or is arg2 or later 7959 7960 If the switch is not present, the condition is false unless 7961 the first character of the <comparison-op> is '!'. 7962 7963 For example, 7964 %:version-compare(>= 10.3 mmacosx-version-min= -lmx) 7965 adds -lmx if -mmacosx-version-min=10.3.9 was passed. */ 7966 7967 static const char * 7968 version_compare_spec_function (int argc, const char **argv) 7969 { 7970 int comp1, comp2; 7971 size_t switch_len; 7972 const char *switch_value = NULL; 7973 int nargs = 1, i; 7974 bool result; 7975 7976 if (argc < 3) 7977 fatal_error ("too few arguments to %%:version-compare"); 7978 if (argv[0][0] == '\0') 7979 abort (); 7980 if ((argv[0][1] == '<' || argv[0][1] == '>') && argv[0][0] != '!') 7981 nargs = 2; 7982 if (argc != nargs + 3) 7983 fatal_error ("too many arguments to %%:version-compare"); 7984 7985 switch_len = strlen (argv[nargs + 1]); 7986 for (i = 0; i < n_switches; i++) 7987 if (!strncmp (switches[i].part1, argv[nargs + 1], switch_len) 7988 && check_live_switch (i, switch_len)) 7989 switch_value = switches[i].part1 + switch_len; 7990 7991 if (switch_value == NULL) 7992 comp1 = comp2 = -1; 7993 else 7994 { 7995 comp1 = compare_version_strings (switch_value, argv[1]); 7996 if (nargs == 2) 7997 comp2 = compare_version_strings (switch_value, argv[2]); 7998 else 7999 comp2 = -1; /* This value unused. */ 8000 } 8001 8002 switch (argv[0][0] << 8 | argv[0][1]) 8003 { 8004 case '>' << 8 | '=': 8005 result = comp1 >= 0; 8006 break; 8007 case '!' << 8 | '<': 8008 result = comp1 >= 0 || switch_value == NULL; 8009 break; 8010 case '<' << 8: 8011 result = comp1 < 0; 8012 break; 8013 case '!' << 8 | '>': 8014 result = comp1 < 0 || switch_value == NULL; 8015 break; 8016 case '>' << 8 | '<': 8017 result = comp1 >= 0 && comp2 < 0; 8018 break; 8019 case '<' << 8 | '>': 8020 result = comp1 < 0 || comp2 >= 0; 8021 break; 8022 8023 default: 8024 fatal_error ("unknown operator %qs in %%:version-compare", argv[0]); 8025 } 8026 if (! result) 8027 return NULL; 8028 8029 return argv[nargs + 2]; 8030 } 8031 8032 /* %:include builtin spec function. This differs from %include in that it 8033 can be nested inside a spec, and thus be conditionalized. It takes 8034 one argument, the filename, and looks for it in the startfile path. 8035 The result is always NULL, i.e. an empty expansion. */ 8036 8037 static const char * 8038 include_spec_function (int argc, const char **argv) 8039 { 8040 char *file; 8041 8042 if (argc != 1) 8043 abort (); 8044 8045 file = find_a_file (&startfile_prefixes, argv[0], R_OK, true); 8046 read_specs (file ? file : argv[0], FALSE); 8047 8048 return NULL; 8049 } 8050 8051 /* %:find-file spec function. This function replaces its argument by 8052 the file found thru find_file, that is the -print-file-name gcc 8053 program option. */ 8054 static const char * 8055 find_file_spec_function (int argc, const char **argv) 8056 { 8057 const char *file; 8058 8059 if (argc != 1) 8060 abort (); 8061 8062 file = find_file (argv[0]); 8063 return file; 8064 } 8065 8066 8067 /* %:find-plugindir spec function. This function replaces its argument 8068 by the -iplugindir=<dir> option. `dir' is found thru find_file, that 8069 is the -print-file-name gcc program option. */ 8070 static const char * 8071 find_plugindir_spec_function (int argc, const char **argv ATTRIBUTE_UNUSED) 8072 { 8073 const char *option; 8074 8075 if (argc != 0) 8076 abort (); 8077 8078 option = concat ("-iplugindir=", find_file ("plugin"), NULL); 8079 return option; 8080 } 8081 8082 8083 /* %:print-asm-header spec function. Print a banner to say that the 8084 following output is from the assembler. */ 8085 8086 static const char * 8087 print_asm_header_spec_function (int arg ATTRIBUTE_UNUSED, 8088 const char **argv ATTRIBUTE_UNUSED) 8089 { 8090 printf (_("Assembler options\n=================\n\n")); 8091 printf (_("Use \"-Wa,OPTION\" to pass \"OPTION\" to the assembler.\n\n")); 8092 fflush (stdout); 8093 return NULL; 8094 } 8095 8096 /* Get a random number for -frandom-seed */ 8097 8098 static unsigned HOST_WIDE_INT 8099 get_random_number (void) 8100 { 8101 unsigned HOST_WIDE_INT ret = 0; 8102 int fd; 8103 8104 fd = open ("/dev/urandom", O_RDONLY); 8105 if (fd >= 0) 8106 { 8107 read (fd, &ret, sizeof (HOST_WIDE_INT)); 8108 close (fd); 8109 if (ret) 8110 return ret; 8111 } 8112 8113 /* Get some more or less random data. */ 8114 #ifdef HAVE_GETTIMEOFDAY 8115 { 8116 struct timeval tv; 8117 8118 gettimeofday (&tv, NULL); 8119 ret = tv.tv_sec * 1000 + tv.tv_usec / 1000; 8120 } 8121 #else 8122 { 8123 time_t now = time (NULL); 8124 8125 if (now != (time_t)-1) 8126 ret = (unsigned) now; 8127 } 8128 #endif 8129 8130 return ret ^ getpid(); 8131 } 8132 8133 /* %:compare-debug-dump-opt spec function. Save the last argument, 8134 expected to be the last -fdump-final-insns option, or generate a 8135 temporary. */ 8136 8137 static const char * 8138 compare_debug_dump_opt_spec_function (int arg, 8139 const char **argv ATTRIBUTE_UNUSED) 8140 { 8141 const char *ret; 8142 char *name; 8143 int which; 8144 static char random_seed[HOST_BITS_PER_WIDE_INT / 4 + 3]; 8145 8146 if (arg != 0) 8147 fatal_error ("too many arguments to %%:compare-debug-dump-opt"); 8148 8149 do_spec_2 ("%{fdump-final-insns=*:%*}"); 8150 do_spec_1 (" ", 0, NULL); 8151 8152 if (VEC_length (const_char_p, argbuf) > 0 8153 && strcmp (argv[VEC_length (const_char_p, argbuf) - 1], ".")) 8154 { 8155 if (!compare_debug) 8156 return NULL; 8157 8158 name = xstrdup (argv[VEC_length (const_char_p, argbuf) - 1]); 8159 ret = NULL; 8160 } 8161 else 8162 { 8163 const char *ext = NULL; 8164 8165 if (VEC_length (const_char_p, argbuf) > 0) 8166 { 8167 do_spec_2 ("%{o*:%*}%{!o:%{!S:%b%O}%{S:%b.s}}"); 8168 ext = ".gkd"; 8169 } 8170 else if (!compare_debug) 8171 return NULL; 8172 else 8173 do_spec_2 ("%g.gkd"); 8174 8175 do_spec_1 (" ", 0, NULL); 8176 8177 gcc_assert (VEC_length (const_char_p, argbuf) > 0); 8178 8179 name = concat (VEC_last (const_char_p, argbuf), ext, NULL); 8180 8181 ret = concat ("-fdump-final-insns=", name, NULL); 8182 } 8183 8184 which = compare_debug < 0; 8185 debug_check_temp_file[which] = name; 8186 8187 if (!which) 8188 { 8189 unsigned HOST_WIDE_INT value = get_random_number (); 8190 8191 sprintf (random_seed, HOST_WIDE_INT_PRINT_HEX, value); 8192 } 8193 8194 if (*random_seed) 8195 ret = concat ("%{!frandom-seed=*:-frandom-seed=", random_seed, "} ", 8196 ret, NULL); 8197 8198 if (which) 8199 *random_seed = 0; 8200 8201 return ret; 8202 } 8203 8204 static const char *debug_auxbase_opt; 8205 8206 /* %:compare-debug-self-opt spec function. Expands to the options 8207 that are to be passed in the second compilation of 8208 compare-debug. */ 8209 8210 static const char * 8211 compare_debug_self_opt_spec_function (int arg, 8212 const char **argv ATTRIBUTE_UNUSED) 8213 { 8214 if (arg != 0) 8215 fatal_error ("too many arguments to %%:compare-debug-self-opt"); 8216 8217 if (compare_debug >= 0) 8218 return NULL; 8219 8220 do_spec_2 ("%{c|S:%{o*:%*}}"); 8221 do_spec_1 (" ", 0, NULL); 8222 8223 if (VEC_length (const_char_p, argbuf) > 0) 8224 debug_auxbase_opt = concat ("-auxbase-strip ", 8225 VEC_last (const_char_p, argbuf), 8226 NULL); 8227 else 8228 debug_auxbase_opt = NULL; 8229 8230 return concat ("\ 8231 %<o %<MD %<MMD %<MF* %<MG %<MP %<MQ* %<MT* \ 8232 %<fdump-final-insns=* -w -S -o %j \ 8233 %{!fcompare-debug-second:-fcompare-debug-second} \ 8234 ", compare_debug_opt, NULL); 8235 } 8236 8237 /* %:compare-debug-auxbase-opt spec function. Expands to the auxbase 8238 options that are to be passed in the second compilation of 8239 compare-debug. It expects, as an argument, the basename of the 8240 current input file name, with the .gk suffix appended to it. */ 8241 8242 static const char * 8243 compare_debug_auxbase_opt_spec_function (int arg, 8244 const char **argv) 8245 { 8246 char *name; 8247 int len; 8248 8249 if (arg == 0) 8250 fatal_error ("too few arguments to %%:compare-debug-auxbase-opt"); 8251 8252 if (arg != 1) 8253 fatal_error ("too many arguments to %%:compare-debug-auxbase-opt"); 8254 8255 if (compare_debug >= 0) 8256 return NULL; 8257 8258 len = strlen (argv[0]); 8259 if (len < 3 || strcmp (argv[0] + len - 3, ".gk") != 0) 8260 fatal_error ("argument to %%:compare-debug-auxbase-opt " 8261 "does not end in .gk"); 8262 8263 if (debug_auxbase_opt) 8264 return debug_auxbase_opt; 8265 8266 #define OPT "-auxbase " 8267 8268 len -= 3; 8269 name = (char*) xmalloc (sizeof (OPT) + len); 8270 memcpy (name, OPT, sizeof (OPT) - 1); 8271 memcpy (name + sizeof (OPT) - 1, argv[0], len); 8272 name[sizeof (OPT) - 1 + len] = '\0'; 8273 8274 #undef OPT 8275 8276 return name; 8277 } 8278 8279 /* %:pass-through-libs spec function. Finds all -l options and input 8280 file names in the lib spec passed to it, and makes a list of them 8281 prepended with the plugin option to cause them to be passed through 8282 to the final link after all the new object files have been added. */ 8283 8284 const char * 8285 pass_through_libs_spec_func (int argc, const char **argv) 8286 { 8287 char *prepended = xstrdup (" "); 8288 int n; 8289 /* Shlemiel the painter's algorithm. Innately horrible, but at least 8290 we know that there will never be more than a handful of strings to 8291 concat, and it's only once per run, so it's not worth optimising. */ 8292 for (n = 0; n < argc; n++) 8293 { 8294 char *old = prepended; 8295 /* Anything that isn't an option is a full path to an output 8296 file; pass it through if it ends in '.a'. Among options, 8297 pass only -l. */ 8298 if (argv[n][0] == '-' && argv[n][1] == 'l') 8299 { 8300 const char *lopt = argv[n] + 2; 8301 /* Handle both joined and non-joined -l options. If for any 8302 reason there's a trailing -l with no joined or following 8303 arg just discard it. */ 8304 if (!*lopt && ++n >= argc) 8305 break; 8306 else if (!*lopt) 8307 lopt = argv[n]; 8308 prepended = concat (prepended, "-plugin-opt=-pass-through=-l", 8309 lopt, " ", NULL); 8310 } 8311 else if (!strcmp (".a", argv[n] + strlen (argv[n]) - 2)) 8312 { 8313 prepended = concat (prepended, "-plugin-opt=-pass-through=", 8314 argv[n], " ", NULL); 8315 } 8316 if (prepended != old) 8317 free (old); 8318 } 8319 return prepended; 8320 } 8321