150397Sobrien/* Specific flags and argument handling of the C++ front-end. 2169689Skan Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004 3132718Skan Free Software Foundation, Inc. 450397Sobrien 5132718SkanThis file is part of GCC. 650397Sobrien 7132718SkanGCC is free software; you can redistribute it and/or modify 850397Sobrienit under the terms of the GNU General Public License as published by 950397Sobrienthe Free Software Foundation; either version 2, or (at your option) 1050397Sobrienany later version. 1150397Sobrien 12132718SkanGCC is distributed in the hope that it will be useful, 1350397Sobrienbut WITHOUT ANY WARRANTY; without even the implied warranty of 1450397SobrienMERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 1550397SobrienGNU General Public License for more details. 1650397Sobrien 1750397SobrienYou should have received a copy of the GNU General Public License 18132718Skanalong with GCC; see the file COPYING. If not, write to 19169689Skanthe Free Software Foundation, 51 Franklin Street, Fifth Floor, 20169689SkanBoston, MA 02110-1301, USA. */ 2150397Sobrien 2250397Sobrien#include "config.h" 2350397Sobrien#include "system.h" 24132718Skan#include "coretypes.h" 25132718Skan#include "tm.h" 2690075Sobrien#include "gcc.h" 2750397Sobrien 2850397Sobrien/* This bit is set if we saw a `-xfoo' language specification. */ 2950397Sobrien#define LANGSPEC (1<<1) 3050397Sobrien/* This bit is set if they did `-lm' or `-lmath'. */ 3150397Sobrien#define MATHLIB (1<<2) 3250397Sobrien/* This bit is set if they did `-lc'. */ 3350397Sobrien#define WITHLIBC (1<<3) 3450397Sobrien 3550397Sobrien#ifndef MATH_LIBRARY 3650397Sobrien#define MATH_LIBRARY "-lm" 3750397Sobrien#endif 3896263Sobrien#ifndef MATH_LIBRARY_PROFILE 39169689Skan#define MATH_LIBRARY_PROFILE MATH_LIBRARY 4096263Sobrien#endif 4152284Sobrien 4252284Sobrien#ifndef LIBSTDCXX 4352284Sobrien#define LIBSTDCXX "-lstdc++" 4450397Sobrien#endif 4596263Sobrien#ifndef LIBSTDCXX_PROFILE 46169689Skan#define LIBSTDCXX_PROFILE LIBSTDCXX 4796263Sobrien#endif 4850397Sobrien 4950397Sobrienvoid 50132718Skanlang_specific_driver (int *in_argc, const char *const **in_argv, 51132718Skan int *in_added_libraries) 5250397Sobrien{ 5350397Sobrien int i, j; 5450397Sobrien 55117395Skan /* If nonzero, the user gave us the `-p' or `-pg' flag. */ 5696263Sobrien int saw_profile_flag = 0; 5796263Sobrien 58117395Skan /* If nonzero, the user gave us the `-v' flag. */ 5950397Sobrien int saw_verbose_flag = 0; 6050397Sobrien 61132718Skan /* This is a tristate: 62132718Skan -1 means we should not link in libstdc++ 63132718Skan 0 means we should link in libstdc++ if it is needed 64132718Skan 1 means libstdc++ is needed and should be linked in. */ 65132718Skan int library = 0; 6650397Sobrien 6750397Sobrien /* The number of arguments being added to what's in argv, other than 6850397Sobrien libraries. We use this to track the number of times we've inserted 6950397Sobrien -xc++/-xnone. */ 70132718Skan int added = 0; 7150397Sobrien 7250397Sobrien /* Used to track options that take arguments, so we don't go wrapping 7350397Sobrien those with -xc++/-xnone. */ 7490075Sobrien const char *quote = NULL; 7550397Sobrien 7650397Sobrien /* The new argument list will be contained in this. */ 7790075Sobrien const char **arglist; 7850397Sobrien 79117395Skan /* Nonzero if we saw a `-xfoo' language specification on the 8050397Sobrien command line. Used to avoid adding our own -xc++ if the user 8150397Sobrien already gave a language for the file. */ 8250397Sobrien int saw_speclang = 0; 8350397Sobrien 8450397Sobrien /* "-lm" or "-lmath" if it appears on the command line. */ 8590075Sobrien const char *saw_math = 0; 8650397Sobrien 8750397Sobrien /* "-lc" if it appears on the command line. */ 8890075Sobrien const char *saw_libc = 0; 8950397Sobrien 9050397Sobrien /* An array used to flag each argument that needs a bit set for 9150397Sobrien LANGSPEC, MATHLIB, or WITHLIBC. */ 9250397Sobrien int *args; 9350397Sobrien 9452284Sobrien /* By default, we throw on the math library if we have one. */ 9552284Sobrien int need_math = (MATH_LIBRARY[0] != '\0'); 9650397Sobrien 9790075Sobrien /* True if we should add -shared-libgcc to the command-line. */ 9890075Sobrien int shared_libgcc = 1; 9990075Sobrien 10050397Sobrien /* The total number of arguments with the new stuff. */ 10150397Sobrien int argc; 10250397Sobrien 10350397Sobrien /* The argument list. */ 10490075Sobrien const char *const *argv; 10550397Sobrien 10650397Sobrien /* The number of libraries added in. */ 10750397Sobrien int added_libraries; 10850397Sobrien 10950397Sobrien /* The total number of arguments with the new stuff. */ 11050397Sobrien int num_args = 1; 11150397Sobrien 11250397Sobrien argc = *in_argc; 11350397Sobrien argv = *in_argv; 11450397Sobrien added_libraries = *in_added_libraries; 11550397Sobrien 116169689Skan args = XCNEWVEC (int, argc); 11750397Sobrien 11850397Sobrien for (i = 1; i < argc; i++) 11950397Sobrien { 12050397Sobrien /* If the previous option took an argument, we swallow it here. */ 12150397Sobrien if (quote) 12250397Sobrien { 12350397Sobrien quote = NULL; 12450397Sobrien continue; 12550397Sobrien } 12650397Sobrien 12750397Sobrien /* We don't do this anymore, since we don't get them with minus 12850397Sobrien signs on them. */ 12950397Sobrien if (argv[i][0] == '\0' || argv[i][1] == '\0') 13050397Sobrien continue; 13150397Sobrien 13250397Sobrien if (argv[i][0] == '-') 13350397Sobrien { 134132718Skan if (strcmp (argv[i], "-nostdlib") == 0 135132718Skan || strcmp (argv[i], "-nodefaultlibs") == 0) 13650397Sobrien { 137132718Skan library = -1; 13850397Sobrien } 139169689Skan else if (strcmp (argv[i], MATH_LIBRARY) == 0) 14050397Sobrien { 14150397Sobrien args[i] |= MATHLIB; 14250397Sobrien need_math = 0; 14350397Sobrien } 14450397Sobrien else if (strcmp (argv[i], "-lc") == 0) 14550397Sobrien args[i] |= WITHLIBC; 14696263Sobrien else if (strcmp (argv[i], "-pg") == 0 || strcmp (argv[i], "-p") == 0) 14796263Sobrien saw_profile_flag++; 14850397Sobrien else if (strcmp (argv[i], "-v") == 0) 149132718Skan saw_verbose_flag = 1; 150132718Skan else if (strncmp (argv[i], "-x", 2) == 0) 15150397Sobrien { 152169689Skan const char * arg; 153169689Skan if (argv[i][2] != '\0') 154169689Skan arg = argv[i]+2; 155169689Skan else if ((argv[i+1]) != NULL) 156169689Skan /* We need to swallow arg on next loop. */ 157169689Skan quote = arg = argv[i+1]; 158169689Skan else /* Error condition, message will be printed later. */ 159169689Skan arg = ""; 160169689Skan if (library == 0 161169689Skan && (strcmp (arg, "c++") == 0 162169689Skan || strcmp (arg, "c++-cpp-output") == 0)) 163169689Skan library = 1; 164169689Skan 165132718Skan saw_speclang = 1; 16650397Sobrien } 167169689Skan /* Arguments that go directly to the linker might be .o files, 168169689Skan or something, and so might cause libstdc++ to be needed. */ 169169689Skan else if (strcmp (argv[i], "-Xlinker") == 0) 170169689Skan { 171169689Skan quote = argv[i]; 172169689Skan if (library == 0) 173169689Skan library = 1; 174169689Skan } 175169689Skan else if (strncmp (argv[i], "-Wl,", 4) == 0) 176169689Skan library = (library == 0) ? 1 : library; 177146895Skan /* Unrecognized libraries (e.g. -lfoo) may require libstdc++. */ 178146895Skan else if (strncmp (argv[i], "-l", 2) == 0) 179146895Skan library = (library == 0) ? 1 : library; 18050397Sobrien else if (((argv[i][2] == '\0' 181132718Skan && strchr ("bBVDUoeTuIYmLiA", argv[i][1]) != NULL) 18250397Sobrien || strcmp (argv[i], "-Tdata") == 0)) 18350397Sobrien quote = argv[i]; 184132718Skan else if ((argv[i][2] == '\0' 185132718Skan && strchr ("cSEM", argv[i][1]) != NULL) 186132718Skan || strcmp (argv[i], "-MM") == 0 187132718Skan || strcmp (argv[i], "-fsyntax-only") == 0) 18850397Sobrien { 18950397Sobrien /* Don't specify libraries if we won't link, since that would 19050397Sobrien cause a warning. */ 191132718Skan library = -1; 19250397Sobrien } 193169689Skan else if (strcmp (argv[i], "-static-libgcc") == 0 19490075Sobrien || strcmp (argv[i], "-static") == 0) 19590075Sobrien shared_libgcc = 0; 196117395Skan else if (DEFAULT_WORD_SWITCH_TAKES_ARG (&argv[i][1])) 197117395Skan i++; 19850397Sobrien else 19950397Sobrien /* Pass other options through. */ 20050397Sobrien continue; 20150397Sobrien } 20250397Sobrien else 20350397Sobrien { 204169689Skan int len; 20550397Sobrien 20650397Sobrien if (saw_speclang) 20750397Sobrien { 20850397Sobrien saw_speclang = 0; 20950397Sobrien continue; 21050397Sobrien } 21150397Sobrien 212132718Skan /* If the filename ends in .[chi], put options around it. 21350397Sobrien But not if a specified -x option is currently active. */ 21450397Sobrien len = strlen (argv[i]); 21550397Sobrien if (len > 2 216169689Skan && (argv[i][len - 1] == 'c' 217132718Skan || argv[i][len - 1] == 'i' 218132718Skan || argv[i][len - 1] == 'h') 21950397Sobrien && argv[i][len - 2] == '.') 22050397Sobrien { 22150397Sobrien args[i] |= LANGSPEC; 22250397Sobrien added += 2; 22350397Sobrien } 224169689Skan 225132718Skan /* If we don't know that this is a header file, we might 226132718Skan need to be linking in the libraries. */ 227132718Skan if (library == 0) 228132718Skan { 229132718Skan if ((len <= 2 || strcmp (argv[i] + (len - 2), ".H") != 0) 230132718Skan && (len <= 2 || strcmp (argv[i] + (len - 2), ".h") != 0) 231132718Skan && (len <= 3 || strcmp (argv[i] + (len - 3), ".hh") != 0)) 232132718Skan library = 1; 233132718Skan } 23450397Sobrien } 23550397Sobrien } 23650397Sobrien 23750397Sobrien if (quote) 238169689Skan fatal ("argument to '%s' missing\n", quote); 23950397Sobrien 24050397Sobrien /* If we know we don't have to do anything, bail now. */ 241132718Skan if (! added && library <= 0) 24250397Sobrien { 24350397Sobrien free (args); 24450397Sobrien return; 24550397Sobrien } 24650397Sobrien 24790075Sobrien /* There's no point adding -shared-libgcc if we don't have a shared 24890075Sobrien libgcc. */ 24990075Sobrien#ifndef ENABLE_SHARED_LIBGCC 25090075Sobrien shared_libgcc = 0; 25190075Sobrien#endif 25250397Sobrien 25390075Sobrien /* Make sure to have room for the trailing NULL argument. */ 254132718Skan num_args = argc + added + need_math + shared_libgcc + (library > 0) + 1; 255169689Skan arglist = XNEWVEC (const char *, num_args); 25690075Sobrien 25790075Sobrien i = 0; 25890075Sobrien j = 0; 259169689Skan 26090075Sobrien /* Copy the 0th argument, i.e., the name of the program itself. */ 26190075Sobrien arglist[i++] = argv[j++]; 26290075Sobrien 26350397Sobrien /* NOTE: We start at 1 now, not 0. */ 26490075Sobrien while (i < argc) 26550397Sobrien { 26650397Sobrien arglist[j] = argv[i]; 26750397Sobrien 26850397Sobrien /* Make sure -lstdc++ is before the math library, since libstdc++ 26950397Sobrien itself uses those math routines. */ 270132718Skan if (!saw_math && (args[i] & MATHLIB) && library > 0) 27150397Sobrien { 27250397Sobrien --j; 27350397Sobrien saw_math = argv[i]; 27450397Sobrien } 27550397Sobrien 276132718Skan if (!saw_libc && (args[i] & WITHLIBC) && library > 0) 27750397Sobrien { 27850397Sobrien --j; 27950397Sobrien saw_libc = argv[i]; 28050397Sobrien } 28150397Sobrien 282132718Skan /* Wrap foo.[chi] files in a language specification to 28350397Sobrien force the gcc compiler driver to run cc1plus on them. */ 28450397Sobrien if (args[i] & LANGSPEC) 28550397Sobrien { 28650397Sobrien int len = strlen (argv[i]); 287132718Skan switch (argv[i][len - 1]) 288132718Skan { 289132718Skan case 'c': 290132718Skan arglist[j++] = "-xc++"; 291132718Skan break; 292132718Skan case 'i': 293132718Skan arglist[j++] = "-xc++-cpp-output"; 294132718Skan break; 295132718Skan case 'h': 296132718Skan arglist[j++] = "-xc++-header"; 297132718Skan break; 298132718Skan default: 299169689Skan gcc_unreachable (); 300132718Skan } 30150397Sobrien arglist[j++] = argv[i]; 30250397Sobrien arglist[j] = "-xnone"; 30350397Sobrien } 30450397Sobrien 30590075Sobrien i++; 30690075Sobrien j++; 30790075Sobrien } 30890075Sobrien 30950397Sobrien /* Add `-lstdc++' if we haven't already done so. */ 310132718Skan if (library > 0) 31150397Sobrien { 312169689Skan arglist[j] = saw_profile_flag ? LIBSTDCXX_PROFILE : LIBSTDCXX; 313169689Skan if (arglist[j][0] != '-' || arglist[j][1] == 'l') 314169689Skan added_libraries++; 315169689Skan j++; 31650397Sobrien } 31750397Sobrien if (saw_math) 31850397Sobrien arglist[j++] = saw_math; 319132718Skan else if (library > 0 && need_math) 32050397Sobrien { 321169689Skan arglist[j] = saw_profile_flag ? MATH_LIBRARY_PROFILE : MATH_LIBRARY; 322169689Skan if (arglist[j][0] != '-' || arglist[j][1] == 'l') 323169689Skan added_libraries++; 324169689Skan j++; 32550397Sobrien } 32650397Sobrien if (saw_libc) 32750397Sobrien arglist[j++] = saw_libc; 32890075Sobrien if (shared_libgcc) 32990075Sobrien arglist[j++] = "-shared-libgcc"; 33050397Sobrien 33150397Sobrien arglist[j] = NULL; 33250397Sobrien 33350397Sobrien *in_argc = j; 33450397Sobrien *in_argv = arglist; 33550397Sobrien *in_added_libraries = added_libraries; 33650397Sobrien} 33750397Sobrien 338117395Skan/* Called before linking. Returns 0 on success and -1 on failure. */ 339132718Skanint lang_specific_pre_link (void) /* Not used for C++. */ 34050397Sobrien{ 34150397Sobrien return 0; 34250397Sobrien} 34350397Sobrien 344117395Skan/* Number of extra output files that lang_specific_pre_link may generate. */ 345117395Skanint lang_specific_extra_outfiles = 0; /* Not used for C++. */ 346