1/* Specific flags and argument handling of the C++ front-end. 2 Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004 3 Free Software Foundation, Inc. 4 5This file is part of GCC. 6 7GCC is free software; you can redistribute it and/or modify 8it under the terms of the GNU General Public License as published by 9the Free Software Foundation; either version 2, or (at your option) 10any later version. 11 12GCC is distributed in the hope that it will be useful, 13but WITHOUT ANY WARRANTY; without even the implied warranty of 14MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15GNU General Public License for more details. 16 17You should have received a copy of the GNU General Public License 18along with GCC; see the file COPYING. If not, write to 19the Free Software Foundation, 51 Franklin Street, Fifth Floor, 20Boston, MA 02110-1301, USA. */ 21 22#include "config.h" 23#include "system.h" 24#include "coretypes.h" 25#include "tm.h" 26#include "gcc.h" 27 28/* This bit is set if we saw a `-xfoo' language specification. */ 29#define LANGSPEC (1<<1) 30/* This bit is set if they did `-lm' or `-lmath'. */ 31#define MATHLIB (1<<2) 32/* This bit is set if they did `-lc'. */ 33#define WITHLIBC (1<<3) 34 35#ifndef MATH_LIBRARY 36#define MATH_LIBRARY "-lm" 37#endif 38#ifndef MATH_LIBRARY_PROFILE 39#define MATH_LIBRARY_PROFILE MATH_LIBRARY 40#endif 41 42#ifndef LIBSTDCXX 43#define LIBSTDCXX "-lstdc++" 44#endif 45#ifndef LIBSTDCXX_PROFILE 46#define LIBSTDCXX_PROFILE LIBSTDCXX 47#endif 48 49void 50lang_specific_driver (int *in_argc, const char *const **in_argv, 51 int *in_added_libraries) 52{ 53 int i, j; 54 55 /* If nonzero, the user gave us the `-p' or `-pg' flag. */ 56 int saw_profile_flag = 0; 57 58 /* If nonzero, the user gave us the `-v' flag. */ 59 int saw_verbose_flag = 0; 60 61 /* This is a tristate: 62 -1 means we should not link in libstdc++ 63 0 means we should link in libstdc++ if it is needed 64 1 means libstdc++ is needed and should be linked in. */ 65 int library = 0; 66 67 /* The number of arguments being added to what's in argv, other than 68 libraries. We use this to track the number of times we've inserted 69 -xc++/-xnone. */ 70 int added = 0; 71 72 /* Used to track options that take arguments, so we don't go wrapping 73 those with -xc++/-xnone. */ 74 const char *quote = NULL; 75 76 /* The new argument list will be contained in this. */ 77 const char **arglist; 78 79 /* Nonzero if we saw a `-xfoo' language specification on the 80 command line. Used to avoid adding our own -xc++ if the user 81 already gave a language for the file. */ 82 int saw_speclang = 0; 83 84 /* "-lm" or "-lmath" if it appears on the command line. */ 85 const char *saw_math = 0; 86 87 /* "-lc" if it appears on the command line. */ 88 const char *saw_libc = 0; 89 90 /* An array used to flag each argument that needs a bit set for 91 LANGSPEC, MATHLIB, or WITHLIBC. */ 92 int *args; 93 94 /* By default, we throw on the math library if we have one. */ 95 int need_math = (MATH_LIBRARY[0] != '\0'); 96 97 /* True if we should add -shared-libgcc to the command-line. */ 98 int shared_libgcc = 1; 99 100 /* The total number of arguments with the new stuff. */ 101 int argc; 102 103 /* The argument list. */ 104 const char *const *argv; 105 106 /* The number of libraries added in. */ 107 int added_libraries; 108 109 /* The total number of arguments with the new stuff. */ 110 int num_args = 1; 111 112 argc = *in_argc; 113 argv = *in_argv; 114 added_libraries = *in_added_libraries; 115 116 args = XCNEWVEC (int, argc); 117 118 for (i = 1; i < argc; i++) 119 { 120 /* If the previous option took an argument, we swallow it here. */ 121 if (quote) 122 { 123 quote = NULL; 124 continue; 125 } 126 127 /* We don't do this anymore, since we don't get them with minus 128 signs on them. */ 129 if (argv[i][0] == '\0' || argv[i][1] == '\0') 130 continue; 131 132 if (argv[i][0] == '-') 133 { 134 if (strcmp (argv[i], "-nostdlib") == 0 135 || strcmp (argv[i], "-nodefaultlibs") == 0) 136 { 137 library = -1; 138 } 139 else if (strcmp (argv[i], MATH_LIBRARY) == 0) 140 { 141 args[i] |= MATHLIB; 142 need_math = 0; 143 } 144 else if (strcmp (argv[i], "-lc") == 0) 145 args[i] |= WITHLIBC; 146 else if (strcmp (argv[i], "-pg") == 0 || strcmp (argv[i], "-p") == 0) 147 saw_profile_flag++; 148 else if (strcmp (argv[i], "-v") == 0) 149 saw_verbose_flag = 1; 150 else if (strncmp (argv[i], "-x", 2) == 0) 151 { 152 const char * arg; 153 if (argv[i][2] != '\0') 154 arg = argv[i]+2; 155 else if ((argv[i+1]) != NULL) 156 /* We need to swallow arg on next loop. */ 157 quote = arg = argv[i+1]; 158 else /* Error condition, message will be printed later. */ 159 arg = ""; 160 if (library == 0 161 && (strcmp (arg, "c++") == 0 162 || strcmp (arg, "c++-cpp-output") == 0)) 163 library = 1; 164 165 saw_speclang = 1; 166 } 167 /* Arguments that go directly to the linker might be .o files, 168 or something, and so might cause libstdc++ to be needed. */ 169 else if (strcmp (argv[i], "-Xlinker") == 0) 170 { 171 quote = argv[i]; 172 if (library == 0) 173 library = 1; 174 } 175 else if (strncmp (argv[i], "-Wl,", 4) == 0) 176 library = (library == 0) ? 1 : library; 177 /* Unrecognized libraries (e.g. -lfoo) may require libstdc++. */ 178 else if (strncmp (argv[i], "-l", 2) == 0) 179 library = (library == 0) ? 1 : library; 180 else if (((argv[i][2] == '\0' 181 && strchr ("bBVDUoeTuIYmLiA", argv[i][1]) != NULL) 182 || strcmp (argv[i], "-Tdata") == 0)) 183 quote = argv[i]; 184 else if ((argv[i][2] == '\0' 185 && strchr ("cSEM", argv[i][1]) != NULL) 186 || strcmp (argv[i], "-MM") == 0 187 || strcmp (argv[i], "-fsyntax-only") == 0) 188 { 189 /* Don't specify libraries if we won't link, since that would 190 cause a warning. */ 191 library = -1; 192 } 193 else if (strcmp (argv[i], "-static-libgcc") == 0 194 || strcmp (argv[i], "-static") == 0) 195 shared_libgcc = 0; 196 else if (DEFAULT_WORD_SWITCH_TAKES_ARG (&argv[i][1])) 197 i++; 198 else 199 /* Pass other options through. */ 200 continue; 201 } 202 else 203 { 204 int len; 205 206 if (saw_speclang) 207 { 208 saw_speclang = 0; 209 continue; 210 } 211 212 /* If the filename ends in .[chi], put options around it. 213 But not if a specified -x option is currently active. */ 214 len = strlen (argv[i]); 215 if (len > 2 216 && (argv[i][len - 1] == 'c' 217 || argv[i][len - 1] == 'i' 218 || argv[i][len - 1] == 'h') 219 && argv[i][len - 2] == '.') 220 { 221 args[i] |= LANGSPEC; 222 added += 2; 223 } 224 225 /* If we don't know that this is a header file, we might 226 need to be linking in the libraries. */ 227 if (library == 0) 228 { 229 if ((len <= 2 || strcmp (argv[i] + (len - 2), ".H") != 0) 230 && (len <= 2 || strcmp (argv[i] + (len - 2), ".h") != 0) 231 && (len <= 3 || strcmp (argv[i] + (len - 3), ".hh") != 0)) 232 library = 1; 233 } 234 } 235 } 236 237 if (quote) 238 fatal ("argument to '%s' missing\n", quote); 239 240 /* If we know we don't have to do anything, bail now. */ 241 if (! added && library <= 0) 242 { 243 free (args); 244 return; 245 } 246 247 /* There's no point adding -shared-libgcc if we don't have a shared 248 libgcc. */ 249#ifndef ENABLE_SHARED_LIBGCC 250 shared_libgcc = 0; 251#endif 252 253 /* Make sure to have room for the trailing NULL argument. */ 254 num_args = argc + added + need_math + shared_libgcc + (library > 0) + 1; 255 arglist = XNEWVEC (const char *, num_args); 256 257 i = 0; 258 j = 0; 259 260 /* Copy the 0th argument, i.e., the name of the program itself. */ 261 arglist[i++] = argv[j++]; 262 263 /* NOTE: We start at 1 now, not 0. */ 264 while (i < argc) 265 { 266 arglist[j] = argv[i]; 267 268 /* Make sure -lstdc++ is before the math library, since libstdc++ 269 itself uses those math routines. */ 270 if (!saw_math && (args[i] & MATHLIB) && library > 0) 271 { 272 --j; 273 saw_math = argv[i]; 274 } 275 276 if (!saw_libc && (args[i] & WITHLIBC) && library > 0) 277 { 278 --j; 279 saw_libc = argv[i]; 280 } 281 282 /* Wrap foo.[chi] files in a language specification to 283 force the gcc compiler driver to run cc1plus on them. */ 284 if (args[i] & LANGSPEC) 285 { 286 int len = strlen (argv[i]); 287 switch (argv[i][len - 1]) 288 { 289 case 'c': 290 arglist[j++] = "-xc++"; 291 break; 292 case 'i': 293 arglist[j++] = "-xc++-cpp-output"; 294 break; 295 case 'h': 296 arglist[j++] = "-xc++-header"; 297 break; 298 default: 299 gcc_unreachable (); 300 } 301 arglist[j++] = argv[i]; 302 arglist[j] = "-xnone"; 303 } 304 305 i++; 306 j++; 307 } 308 309 /* Add `-lstdc++' if we haven't already done so. */ 310 if (library > 0) 311 { 312 arglist[j] = saw_profile_flag ? LIBSTDCXX_PROFILE : LIBSTDCXX; 313 if (arglist[j][0] != '-' || arglist[j][1] == 'l') 314 added_libraries++; 315 j++; 316 } 317 if (saw_math) 318 arglist[j++] = saw_math; 319 else if (library > 0 && need_math) 320 { 321 arglist[j] = saw_profile_flag ? MATH_LIBRARY_PROFILE : MATH_LIBRARY; 322 if (arglist[j][0] != '-' || arglist[j][1] == 'l') 323 added_libraries++; 324 j++; 325 } 326 if (saw_libc) 327 arglist[j++] = saw_libc; 328 if (shared_libgcc) 329 arglist[j++] = "-shared-libgcc"; 330 331 arglist[j] = NULL; 332 333 *in_argc = j; 334 *in_argv = arglist; 335 *in_added_libraries = added_libraries; 336} 337 338/* Called before linking. Returns 0 on success and -1 on failure. */ 339int lang_specific_pre_link (void) /* Not used for C++. */ 340{ 341 return 0; 342} 343 344/* Number of extra output files that lang_specific_pre_link may generate. */ 345int lang_specific_extra_outfiles = 0; /* Not used for C++. */ 346