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Diffstat (limited to 'gcc/cp/g++spec.c')
| -rw-r--r-- | gcc/cp/g++spec.c | 345 |
1 files changed, 345 insertions, 0 deletions
diff --git a/gcc/cp/g++spec.c b/gcc/cp/g++spec.c new file mode 100644 index 0000000..b58fdcd --- /dev/null +++ b/gcc/cp/g++spec.c @@ -0,0 +1,345 @@ +/* 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++. */ |
