1 /* Specific flags and argument handling of the C++ front-end. 2 Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001 Free Software Foundation, Inc. 3 4 This file is part of GNU CC. 5 6 GNU CC is free software; you can redistribute it and/or modify 7 it under the terms of the GNU General Public License as published by 8 the Free Software Foundation; either version 2, or (at your option) 9 any later version. 10 11 GNU CC is distributed in the hope that it will be useful, 12 but WITHOUT ANY WARRANTY; without even the implied warranty of 13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 GNU General Public License for more details. 15 16 You should have received a copy of the GNU General Public License 17 along with GNU CC; see the file COPYING. If not, write to 18 the Free Software Foundation, 59 Temple Place - Suite 330, 19 Boston, MA 02111-1307, USA. */ 20 21 #include "config.h" 22 #include "system.h" 23 #include "gcc.h" 24 25 /* This bit is set if we saw a `-xfoo' language specification. */ 26 #define LANGSPEC (1<<1) 27 /* This bit is set if they did `-lm' or `-lmath'. */ 28 #define MATHLIB (1<<2) 29 /* This bit is set if they did `-lc'. */ 30 #define WITHLIBC (1<<3) 31 32 #ifndef MATH_LIBRARY 33 #define MATH_LIBRARY "-lm" 34 #endif 35 #ifndef MATH_LIBRARY_PROFILE 36 #define MATH_LIBRARY_PROFILE "-lm" 37 #endif 38 39 #ifndef LIBSTDCXX 40 #define LIBSTDCXX "-lstdc++" 41 #endif 42 #ifndef LIBSTDCXX_PROFILE 43 #define LIBSTDCXX_PROFILE "-lstdc++" 44 #endif 45 #ifndef LIBSUPCXX 46 #define LIBSUPCXX "-lsupc++" 47 #endif 48 #ifndef LIBSUPCXX_PROFILE 49 #define LIBSUPCXX_PROFILE "-lsupc++" 50 #endif 51 52 void 53 lang_specific_driver (in_argc, in_argv, in_added_libraries) 54 int *in_argc; 55 const char *const **in_argv; 56 int *in_added_libraries; 57 { 58 int i, j; 59 60 /* If nonzero, the user gave us the `-p' or `-pg' flag. */ 61 int saw_profile_flag = 0; 62 63 /* If nonzero, the user gave us the `-v' flag. */ 64 int saw_verbose_flag = 0; 65 66 /* This will be 0 if we encounter a situation where we should not 67 link in libstdc++. */ 68 int library = 1; 69 70 /* This will be 1 if we encounter a situation where we should link 71 libsupc++. */ 72 int libsupcxx = 0; 73 74 /* The number of arguments being added to what's in argv, other than 75 libraries. We use this to track the number of times we've inserted 76 -xc++/-xnone. */ 77 int added = 2; 78 79 /* Used to track options that take arguments, so we don't go wrapping 80 those with -xc++/-xnone. */ 81 const char *quote = NULL; 82 83 /* The new argument list will be contained in this. */ 84 const char **arglist; 85 86 /* Nonzero if we saw a `-xfoo' language specification on the 87 command line. Used to avoid adding our own -xc++ if the user 88 already gave a language for the file. */ 89 int saw_speclang = 0; 90 91 /* "-lm" or "-lmath" if it appears on the command line. */ 92 const char *saw_math = 0; 93 94 /* "-lc" if it appears on the command line. */ 95 const char *saw_libc = 0; 96 97 /* An array used to flag each argument that needs a bit set for 98 LANGSPEC, MATHLIB, or WITHLIBC. */ 99 int *args; 100 101 /* By default, we throw on the math library if we have one. */ 102 int need_math = (MATH_LIBRARY[0] != '\0'); 103 104 /* True if we should add -shared-libgcc to the command-line. */ 105 int shared_libgcc = 1; 106 107 /* The total number of arguments with the new stuff. */ 108 int argc; 109 110 /* The argument list. */ 111 const char *const *argv; 112 113 /* The number of libraries added in. */ 114 int added_libraries; 115 116 /* The total number of arguments with the new stuff. */ 117 int num_args = 1; 118 119 argc = *in_argc; 120 argv = *in_argv; 121 added_libraries = *in_added_libraries; 122 123 args = (int *) xcalloc (argc, sizeof (int)); 124 125 for (i = 1; i < argc; i++) 126 { 127 /* If the previous option took an argument, we swallow it here. */ 128 if (quote) 129 { 130 quote = NULL; 131 continue; 132 } 133 134 /* We don't do this anymore, since we don't get them with minus 135 signs on them. */ 136 if (argv[i][0] == '\0' || argv[i][1] == '\0') 137 continue; 138 139 if (argv[i][0] == '-') 140 { 141 if ((strcmp (argv[i], "-nostdlib") == 0 142 || strcmp (argv[i], "-nodefaultlibs") == 0)) 143 { 144 library = 0; 145 libsupcxx = -1; 146 } 147 else if (strcmp (argv[i], "-shared") == 0) 148 { 149 library = 0; 150 if (libsupcxx == 0) 151 libsupcxx = 1; 152 } 153 else if (strcmp (argv[i], "-lm") == 0 154 || strcmp (argv[i], "-lmath") == 0 155 || strcmp (argv[i], MATH_LIBRARY) == 0 156 #ifdef ALT_LIBM 157 || strcmp (argv[i], ALT_LIBM) == 0 158 #endif 159 ) 160 { 161 args[i] |= MATHLIB; 162 need_math = 0; 163 } 164 else if (strcmp (argv[i], "-lc") == 0) 165 args[i] |= WITHLIBC; 166 else if (strcmp (argv[i], "-lstdc++") == 0) 167 libsupcxx = -1; 168 else if (strcmp (argv[i], "-pg") == 0 || strcmp (argv[i], "-p") == 0) 169 saw_profile_flag++; 170 else if (strcmp (argv[i], "-v") == 0) 171 { 172 saw_verbose_flag = 1; 173 if (argc == 2) 174 { 175 /* If they only gave us `-v', don't try to link 176 in libg++. */ 177 library = 0; 178 } 179 } 180 else if (strncmp (argv[i], "-x", 2) == 0) 181 saw_speclang = 1; 182 else if (((argv[i][2] == '\0' 183 && (char *)strchr ("bBVDUoeTuIYmLiA", argv[i][1]) != NULL) 184 || strcmp (argv[i], "-Xlinker") == 0 185 || strcmp (argv[i], "-Tdata") == 0)) 186 quote = argv[i]; 187 else if (library != 0 && ((argv[i][2] == '\0' 188 && (char *) strchr ("cSEM", argv[i][1]) != NULL) 189 || strcmp (argv[i], "-MM") == 0 190 || strcmp (argv[i], "-fsyntax-only") == 0)) 191 { 192 /* Don't specify libraries if we won't link, since that would 193 cause a warning. */ 194 library = 0; 195 added -= 2; 196 } 197 else if (strcmp (argv[i], "-static-libgcc") == 0 198 || strcmp (argv[i], "-static") == 0) 199 shared_libgcc = 0; 200 else if (DEFAULT_WORD_SWITCH_TAKES_ARG (&argv[i][1])) 201 i++; 202 else 203 /* Pass other options through. */ 204 continue; 205 } 206 else 207 { 208 int len; 209 210 if (saw_speclang) 211 { 212 saw_speclang = 0; 213 continue; 214 } 215 216 /* If the filename ends in .c or .i, put options around it. 217 But not if a specified -x option is currently active. */ 218 len = strlen (argv[i]); 219 if (len > 2 220 && (argv[i][len - 1] == 'c' || argv[i][len - 1] == 'i') 221 && argv[i][len - 2] == '.') 222 { 223 args[i] |= LANGSPEC; 224 added += 2; 225 } 226 } 227 } 228 229 if (quote) 230 fatal ("argument to `%s' missing\n", quote); 231 232 /* If we know we don't have to do anything, bail now. */ 233 if (! added && ! library) 234 { 235 free (args); 236 return; 237 } 238 239 /* There's no point adding -shared-libgcc if we don't have a shared 240 libgcc. */ 241 #ifndef ENABLE_SHARED_LIBGCC 242 shared_libgcc = 0; 243 #endif 244 245 /* Make sure to have room for the trailing NULL argument. */ 246 num_args = argc + added + need_math + shared_libgcc + 1; 247 arglist = (const char **) xmalloc (num_args * sizeof (char *)); 248 249 i = 0; 250 j = 0; 251 252 /* Copy the 0th argument, i.e., the name of the program itself. */ 253 arglist[i++] = argv[j++]; 254 255 /* NOTE: We start at 1 now, not 0. */ 256 while (i < argc) 257 { 258 arglist[j] = argv[i]; 259 260 /* Make sure -lstdc++ is before the math library, since libstdc++ 261 itself uses those math routines. */ 262 if (!saw_math && (args[i] & MATHLIB) && library) 263 { 264 --j; 265 saw_math = argv[i]; 266 } 267 268 if (!saw_libc && (args[i] & WITHLIBC) && library) 269 { 270 --j; 271 saw_libc = argv[i]; 272 } 273 274 /* Wrap foo.c and foo.i files in a language specification to 275 force the gcc compiler driver to run cc1plus on them. */ 276 if (args[i] & LANGSPEC) 277 { 278 int len = strlen (argv[i]); 279 if (argv[i][len - 1] == 'i') 280 arglist[j++] = "-xc++-cpp-output"; 281 else 282 arglist[j++] = "-xc++"; 283 arglist[j++] = argv[i]; 284 arglist[j] = "-xnone"; 285 } 286 287 i++; 288 j++; 289 } 290 291 /* Add -lsupc++ for shared. */ 292 if (libsupcxx == 1) 293 { 294 arglist[j++] = saw_profile_flag ? LIBSUPCXX_PROFILE : LIBSUPCXX; 295 added_libraries++; 296 } 297 /* Add `-lstdc++' if we haven't already done so. */ 298 if (library) 299 { 300 arglist[j++] = saw_profile_flag ? LIBSTDCXX_PROFILE : LIBSTDCXX; 301 added_libraries++; 302 #ifdef USE_LIBUNWIND_EXCEPTIONS 303 # ifndef LIBUNWIND 304 # define LIBUNWIND "-lunwind" 305 # endif 306 arglist[j++] = LIBUNWIND; 307 added_libraries++; 308 #endif 309 } 310 if (saw_math) 311 arglist[j++] = saw_math; 312 else if (library && need_math) 313 { 314 arglist[j++] = saw_profile_flag ? MATH_LIBRARY_PROFILE : MATH_LIBRARY; 315 added_libraries++; 316 } 317 if (saw_libc) 318 arglist[j++] = saw_libc; 319 if (shared_libgcc) 320 arglist[j++] = "-shared-libgcc"; 321 322 arglist[j] = NULL; 323 324 *in_argc = j; 325 *in_argv = arglist; 326 *in_added_libraries = added_libraries; 327 } 328 329 /* Called before linking. Returns 0 on success and -1 on failure. */ 330 int lang_specific_pre_link () /* Not used for C++. */ 331 { 332 return 0; 333 } 334 335 /* Number of extra output files that lang_specific_pre_link may generate. */ 336 int lang_specific_extra_outfiles = 0; /* Not used for C++. */ 337 338 /* Table of language-specific spec functions. */ 339 const struct spec_function lang_specific_spec_functions[] = 340 { 341 { 0, 0 } 342 }; 343