d096f2f5a8
Unfortunately this causes ICE on powerpc and sparc64. Reducing these differences against upstream is not important anymore so hopefully I have finished breaking the compiler occasionally.
346 lines
9.1 KiB
C
346 lines
9.1 KiB
C
/* Specific flags and argument handling of the C++ front-end.
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Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004
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Free Software Foundation, Inc.
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This file is part of GCC.
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GCC is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GCC is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GCC; see the file COPYING. If not, write to
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the Free Software Foundation, 51 Franklin Street, Fifth Floor,
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Boston, MA 02110-1301, USA. */
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#include "config.h"
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#include "system.h"
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#include "coretypes.h"
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#include "tm.h"
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#include "gcc.h"
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/* This bit is set if we saw a `-xfoo' language specification. */
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#define LANGSPEC (1<<1)
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/* This bit is set if they did `-lm' or `-lmath'. */
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#define MATHLIB (1<<2)
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/* This bit is set if they did `-lc'. */
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#define WITHLIBC (1<<3)
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#ifndef MATH_LIBRARY
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#define MATH_LIBRARY "-lm"
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#endif
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#ifndef MATH_LIBRARY_PROFILE
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#define MATH_LIBRARY_PROFILE MATH_LIBRARY
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#endif
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#ifndef LIBSTDCXX
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#define LIBSTDCXX "-lstdc++"
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#endif
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#ifndef LIBSTDCXX_PROFILE
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#define LIBSTDCXX_PROFILE LIBSTDCXX
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#endif
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void
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lang_specific_driver (int *in_argc, const char *const **in_argv,
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int *in_added_libraries)
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{
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int i, j;
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/* If nonzero, the user gave us the `-p' or `-pg' flag. */
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int saw_profile_flag = 0;
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/* If nonzero, the user gave us the `-v' flag. */
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int saw_verbose_flag = 0;
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/* This is a tristate:
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-1 means we should not link in libstdc++
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0 means we should link in libstdc++ if it is needed
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1 means libstdc++ is needed and should be linked in. */
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int library = 0;
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/* The number of arguments being added to what's in argv, other than
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libraries. We use this to track the number of times we've inserted
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-xc++/-xnone. */
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int added = 0;
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/* Used to track options that take arguments, so we don't go wrapping
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those with -xc++/-xnone. */
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const char *quote = NULL;
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/* The new argument list will be contained in this. */
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const char **arglist;
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/* Nonzero if we saw a `-xfoo' language specification on the
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command line. Used to avoid adding our own -xc++ if the user
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already gave a language for the file. */
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int saw_speclang = 0;
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/* "-lm" or "-lmath" if it appears on the command line. */
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const char *saw_math = 0;
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/* "-lc" if it appears on the command line. */
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const char *saw_libc = 0;
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/* An array used to flag each argument that needs a bit set for
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LANGSPEC, MATHLIB, or WITHLIBC. */
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int *args;
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/* By default, we throw on the math library if we have one. */
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int need_math = (MATH_LIBRARY[0] != '\0');
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/* True if we should add -shared-libgcc to the command-line. */
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int shared_libgcc = 1;
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/* The total number of arguments with the new stuff. */
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int argc;
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/* The argument list. */
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const char *const *argv;
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/* The number of libraries added in. */
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int added_libraries;
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/* The total number of arguments with the new stuff. */
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int num_args = 1;
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argc = *in_argc;
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argv = *in_argv;
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added_libraries = *in_added_libraries;
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args = XCNEWVEC (int, argc);
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for (i = 1; i < argc; i++)
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{
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/* If the previous option took an argument, we swallow it here. */
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if (quote)
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{
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quote = NULL;
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continue;
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}
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/* We don't do this anymore, since we don't get them with minus
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signs on them. */
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if (argv[i][0] == '\0' || argv[i][1] == '\0')
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continue;
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if (argv[i][0] == '-')
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{
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if (strcmp (argv[i], "-nostdlib") == 0
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|| strcmp (argv[i], "-nodefaultlibs") == 0)
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{
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library = -1;
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}
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else if (strcmp (argv[i], MATH_LIBRARY) == 0)
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{
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args[i] |= MATHLIB;
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need_math = 0;
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}
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else if (strcmp (argv[i], "-lc") == 0)
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args[i] |= WITHLIBC;
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else if (strcmp (argv[i], "-pg") == 0 || strcmp (argv[i], "-p") == 0)
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saw_profile_flag++;
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else if (strcmp (argv[i], "-v") == 0)
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saw_verbose_flag = 1;
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else if (strncmp (argv[i], "-x", 2) == 0)
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{
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const char * arg;
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if (argv[i][2] != '\0')
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arg = argv[i]+2;
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else if ((argv[i+1]) != NULL)
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/* We need to swallow arg on next loop. */
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quote = arg = argv[i+1];
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else /* Error condition, message will be printed later. */
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arg = "";
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if (library == 0
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&& (strcmp (arg, "c++") == 0
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|| strcmp (arg, "c++-cpp-output") == 0))
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library = 1;
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saw_speclang = 1;
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}
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/* Arguments that go directly to the linker might be .o files,
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or something, and so might cause libstdc++ to be needed. */
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else if (strcmp (argv[i], "-Xlinker") == 0)
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{
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quote = argv[i];
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if (library == 0)
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library = 1;
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}
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else if (strncmp (argv[i], "-Wl,", 4) == 0)
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library = (library == 0) ? 1 : library;
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/* Unrecognized libraries (e.g. -lfoo) may require libstdc++. */
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else if (strncmp (argv[i], "-l", 2) == 0)
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library = (library == 0) ? 1 : library;
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else if (((argv[i][2] == '\0'
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&& strchr ("bBVDUoeTuIYmLiA", argv[i][1]) != NULL)
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|| strcmp (argv[i], "-Tdata") == 0))
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quote = argv[i];
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else if ((argv[i][2] == '\0'
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&& strchr ("cSEM", argv[i][1]) != NULL)
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|| strcmp (argv[i], "-MM") == 0
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|| strcmp (argv[i], "-fsyntax-only") == 0)
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{
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/* Don't specify libraries if we won't link, since that would
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cause a warning. */
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library = -1;
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}
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else if (strcmp (argv[i], "-static-libgcc") == 0
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|| strcmp (argv[i], "-static") == 0)
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shared_libgcc = 0;
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else if (DEFAULT_WORD_SWITCH_TAKES_ARG (&argv[i][1]))
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i++;
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else
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/* Pass other options through. */
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continue;
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}
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else
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{
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int len;
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if (saw_speclang)
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{
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saw_speclang = 0;
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continue;
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}
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/* If the filename ends in .[chi], put options around it.
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But not if a specified -x option is currently active. */
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len = strlen (argv[i]);
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if (len > 2
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&& (argv[i][len - 1] == 'c'
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|| argv[i][len - 1] == 'i'
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|| argv[i][len - 1] == 'h')
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&& argv[i][len - 2] == '.')
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{
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args[i] |= LANGSPEC;
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added += 2;
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}
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/* If we don't know that this is a header file, we might
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need to be linking in the libraries. */
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if (library == 0)
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{
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if ((len <= 2 || strcmp (argv[i] + (len - 2), ".H") != 0)
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&& (len <= 2 || strcmp (argv[i] + (len - 2), ".h") != 0)
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&& (len <= 3 || strcmp (argv[i] + (len - 3), ".hh") != 0))
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library = 1;
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}
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}
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}
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if (quote)
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fatal ("argument to '%s' missing\n", quote);
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/* If we know we don't have to do anything, bail now. */
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if (! added && library <= 0)
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{
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free (args);
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return;
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}
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/* There's no point adding -shared-libgcc if we don't have a shared
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libgcc. */
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#ifndef ENABLE_SHARED_LIBGCC
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shared_libgcc = 0;
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#endif
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/* Make sure to have room for the trailing NULL argument. */
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num_args = argc + added + need_math + shared_libgcc + (library > 0) + 1;
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arglist = XNEWVEC (const char *, num_args);
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i = 0;
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j = 0;
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/* Copy the 0th argument, i.e., the name of the program itself. */
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arglist[i++] = argv[j++];
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/* NOTE: We start at 1 now, not 0. */
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while (i < argc)
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{
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arglist[j] = argv[i];
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/* Make sure -lstdc++ is before the math library, since libstdc++
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itself uses those math routines. */
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if (!saw_math && (args[i] & MATHLIB) && library > 0)
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{
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--j;
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saw_math = argv[i];
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}
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if (!saw_libc && (args[i] & WITHLIBC) && library > 0)
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{
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--j;
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saw_libc = argv[i];
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}
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/* Wrap foo.[chi] files in a language specification to
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force the gcc compiler driver to run cc1plus on them. */
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if (args[i] & LANGSPEC)
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{
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int len = strlen (argv[i]);
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switch (argv[i][len - 1])
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{
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case 'c':
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arglist[j++] = "-xc++";
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break;
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case 'i':
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arglist[j++] = "-xc++-cpp-output";
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break;
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case 'h':
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arglist[j++] = "-xc++-header";
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break;
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default:
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gcc_unreachable ();
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}
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arglist[j++] = argv[i];
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arglist[j] = "-xnone";
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}
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i++;
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j++;
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}
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/* Add `-lstdc++' if we haven't already done so. */
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if (library > 0)
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{
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arglist[j] = saw_profile_flag ? LIBSTDCXX_PROFILE : LIBSTDCXX;
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if (arglist[j][0] != '-' || arglist[j][1] == 'l')
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added_libraries++;
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j++;
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}
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if (saw_math)
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arglist[j++] = saw_math;
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else if (library > 0 && need_math)
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{
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arglist[j] = saw_profile_flag ? MATH_LIBRARY_PROFILE : MATH_LIBRARY;
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if (arglist[j][0] != '-' || arglist[j][1] == 'l')
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added_libraries++;
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j++;
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}
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if (saw_libc)
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arglist[j++] = saw_libc;
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if (shared_libgcc)
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arglist[j++] = "-shared-libgcc";
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arglist[j] = NULL;
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*in_argc = j;
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*in_argv = arglist;
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*in_added_libraries = added_libraries;
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}
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/* Called before linking. Returns 0 on success and -1 on failure. */
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int lang_specific_pre_link (void) /* Not used for C++. */
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{
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return 0;
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}
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/* Number of extra output files that lang_specific_pre_link may generate. */
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int lang_specific_extra_outfiles = 0; /* Not used for C++. */
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