/* Specific flags and argument handling of the C++ front-end. Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004 Free Software Foundation, Inc. This file is part of GCC. GCC is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2, or (at your option) any later version. GCC is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with GCC; see the file COPYING. If not, write to the Free Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ #include "config.h" #include "system.h" #include "coretypes.h" #include "tm.h" #include "gcc.h" /* This bit is set if we saw a `-xfoo' language specification. */ #define LANGSPEC (1<<1) /* This bit is set if they did `-lm' or `-lmath'. */ #define MATHLIB (1<<2) /* This bit is set if they did `-lc'. */ #define WITHLIBC (1<<3) #ifndef MATH_LIBRARY #define MATH_LIBRARY "-lm" #endif #ifndef MATH_LIBRARY_PROFILE #define MATH_LIBRARY_PROFILE MATH_LIBRARY #endif #ifndef LIBSTDCXX #define LIBSTDCXX "-lstdc++" #endif #ifndef LIBSTDCXX_PROFILE #define LIBSTDCXX_PROFILE LIBSTDCXX #endif void lang_specific_driver (int *in_argc, const char *const **in_argv, int *in_added_libraries) { int i, j; /* If nonzero, the user gave us the `-p' or `-pg' flag. */ int saw_profile_flag = 0; /* If nonzero, the user gave us the `-v' flag. */ int saw_verbose_flag = 0; /* This is a tristate: -1 means we should not link in libstdc++ 0 means we should link in libstdc++ if it is needed 1 means libstdc++ is needed and should be linked in. */ int library = 0; /* The number of arguments being added to what's in argv, other than libraries. We use this to track the number of times we've inserted -xc++/-xnone. */ int added = 0; /* Used to track options that take arguments, so we don't go wrapping those with -xc++/-xnone. */ const char *quote = NULL; /* The new argument list will be contained in this. */ const char **arglist; /* Nonzero if we saw a `-xfoo' language specification on the command line. Used to avoid adding our own -xc++ if the user already gave a language for the file. */ int saw_speclang = 0; /* "-lm" or "-lmath" if it appears on the command line. */ const char *saw_math = 0; /* "-lc" if it appears on the command line. */ const char *saw_libc = 0; /* An array used to flag each argument that needs a bit set for LANGSPEC, MATHLIB, or WITHLIBC. */ int *args; /* By default, we throw on the math library if we have one. */ int need_math = (MATH_LIBRARY[0] != '\0'); /* True if we should add -shared-libgcc to the command-line. */ int shared_libgcc = 1; /* The total number of arguments with the new stuff. */ int argc; /* The argument list. */ const char *const *argv; /* The number of libraries added in. */ int added_libraries; /* The total number of arguments with the new stuff. */ int num_args = 1; argc = *in_argc; argv = *in_argv; added_libraries = *in_added_libraries; args = XCNEWVEC (int, argc); for (i = 1; i < argc; i++) { /* If the previous option took an argument, we swallow it here. */ if (quote) { quote = NULL; continue; } /* We don't do this anymore, since we don't get them with minus signs on them. */ if (argv[i][0] == '\0' || argv[i][1] == '\0') continue; if (argv[i][0] == '-') { if (strcmp (argv[i], "-nostdlib") == 0 || strcmp (argv[i], "-nodefaultlibs") == 0) { library = -1; } else if (strcmp (argv[i], MATH_LIBRARY) == 0) { args[i] |= MATHLIB; need_math = 0; } else if (strcmp (argv[i], "-lc") == 0) args[i] |= WITHLIBC; else if (strcmp (argv[i], "-pg") == 0 || strcmp (argv[i], "-p") == 0) saw_profile_flag++; else if (strcmp (argv[i], "-v") == 0) saw_verbose_flag = 1; else if (strncmp (argv[i], "-x", 2) == 0) { const char * arg; if (argv[i][2] != '\0') arg = argv[i]+2; else if ((argv[i+1]) != NULL) /* We need to swallow arg on next loop. */ quote = arg = argv[i+1]; else /* Error condition, message will be printed later. */ arg = ""; if (library == 0 && (strcmp (arg, "c++") == 0 || strcmp (arg, "c++-cpp-output") == 0)) library = 1; saw_speclang = 1; } /* Arguments that go directly to the linker might be .o files, or something, and so might cause libstdc++ to be needed. */ else if (strcmp (argv[i], "-Xlinker") == 0) { quote = argv[i]; if (library == 0) library = 1; } else if (strncmp (argv[i], "-Wl,", 4) == 0) library = (library == 0) ? 1 : library; /* Unrecognized libraries (e.g. -lfoo) may require libstdc++. */ else if (strncmp (argv[i], "-l", 2) == 0) library = (library == 0) ? 1 : library; else if (((argv[i][2] == '\0' && strchr ("bBVDUoeTuIYmLiA", argv[i][1]) != NULL) || strcmp (argv[i], "-Tdata") == 0)) quote = argv[i]; else if ((argv[i][2] == '\0' && strchr ("cSEM", argv[i][1]) != NULL) || strcmp (argv[i], "-MM") == 0 || strcmp (argv[i], "-fsyntax-only") == 0) { /* Don't specify libraries if we won't link, since that would cause a warning. */ library = -1; } else if (strcmp (argv[i], "-static-libgcc") == 0 || strcmp (argv[i], "-static") == 0) shared_libgcc = 0; else if (DEFAULT_WORD_SWITCH_TAKES_ARG (&argv[i][1])) i++; else /* Pass other options through. */ continue; } else { int len; if (saw_speclang) { saw_speclang = 0; continue; } /* If the filename ends in .[chi], put options around it. But not if a specified -x option is currently active. */ len = strlen (argv[i]); if (len > 2 && (argv[i][len - 1] == 'c' || argv[i][len - 1] == 'i' || argv[i][len - 1] == 'h') && argv[i][len - 2] == '.') { args[i] |= LANGSPEC; added += 2; } /* If we don't know that this is a header file, we might need to be linking in the libraries. */ if (library == 0) { if ((len <= 2 || strcmp (argv[i] + (len - 2), ".H") != 0) && (len <= 2 || strcmp (argv[i] + (len - 2), ".h") != 0) && (len <= 3 || strcmp (argv[i] + (len - 3), ".hh") != 0)) library = 1; } } } if (quote) fatal ("argument to '%s' missing\n", quote); /* If we know we don't have to do anything, bail now. */ if (! added && library <= 0) { free (args); return; } /* There's no point adding -shared-libgcc if we don't have a shared libgcc. */ #ifndef ENABLE_SHARED_LIBGCC shared_libgcc = 0; #endif /* Make sure to have room for the trailing NULL argument. */ num_args = argc + added + need_math + shared_libgcc + (library > 0) + 1; arglist = XNEWVEC (const char *, num_args); i = 0; j = 0; /* Copy the 0th argument, i.e., the name of the program itself. */ arglist[i++] = argv[j++]; /* NOTE: We start at 1 now, not 0. */ while (i < argc) { arglist[j] = argv[i]; /* Make sure -lstdc++ is before the math library, since libstdc++ itself uses those math routines. */ if (!saw_math && (args[i] & MATHLIB) && library > 0) { --j; saw_math = argv[i]; } if (!saw_libc && (args[i] & WITHLIBC) && library > 0) { --j; saw_libc = argv[i]; } /* Wrap foo.[chi] files in a language specification to force the gcc compiler driver to run cc1plus on them. */ if (args[i] & LANGSPEC) { int len = strlen (argv[i]); switch (argv[i][len - 1]) { case 'c': arglist[j++] = "-xc++"; break; case 'i': arglist[j++] = "-xc++-cpp-output"; break; case 'h': arglist[j++] = "-xc++-header"; break; default: gcc_unreachable (); } arglist[j++] = argv[i]; arglist[j] = "-xnone"; } i++; j++; } /* Add `-lstdc++' if we haven't already done so. */ if (library > 0) { arglist[j] = saw_profile_flag ? LIBSTDCXX_PROFILE : LIBSTDCXX; if (arglist[j][0] != '-' || arglist[j][1] == 'l') added_libraries++; j++; } if (saw_math) arglist[j++] = saw_math; else if (library > 0 && need_math) { arglist[j] = saw_profile_flag ? MATH_LIBRARY_PROFILE : MATH_LIBRARY; if (arglist[j][0] != '-' || arglist[j][1] == 'l') added_libraries++; j++; } if (saw_libc) arglist[j++] = saw_libc; if (shared_libgcc) arglist[j++] = "-shared-libgcc"; arglist[j] = NULL; *in_argc = j; *in_argv = arglist; *in_added_libraries = added_libraries; } /* Called before linking. Returns 0 on success and -1 on failure. */ int lang_specific_pre_link (void) /* Not used for C++. */ { return 0; } /* Number of extra output files that lang_specific_pre_link may generate. */ int lang_specific_extra_outfiles = 0; /* Not used for C++. */