292 lines
7.4 KiB
C
292 lines
7.4 KiB
C
/* Specific flags and argument handling of the C++ front-end.
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Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001 Free Software Foundation, Inc.
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This file is part of GNU CC.
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GNU CC 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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GNU CC 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 GNU CC; see the file COPYING. If not, write to
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the Free Software Foundation, 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#include "config.h"
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#include "system.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 LIBSTDCXX
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#define LIBSTDCXX "-lstdc++"
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#endif
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void
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lang_specific_driver (in_argc, in_argv, in_added_libraries)
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int *in_argc;
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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 non-zero, the user gave us the `-v' flag. */
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int saw_verbose_flag = 0;
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/* This will be 0 if we encounter a situation where we should not
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link in libstdc++. */
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int library = 1;
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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 = 2;
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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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/* Non-zero 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 = (int *) xcalloc (argc, sizeof (int));
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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 (library != 0 && (strcmp (argv[i], "-nostdlib") == 0
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|| strcmp (argv[i], "-nodefaultlibs") == 0))
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{
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library = 0;
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}
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else if (strcmp (argv[i], "-lm") == 0
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|| strcmp (argv[i], "-lmath") == 0
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|| strcmp (argv[i], MATH_LIBRARY) == 0
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#ifdef ALT_LIBM
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|| strcmp (argv[i], ALT_LIBM) == 0
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#endif
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)
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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], "-v") == 0)
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{
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saw_verbose_flag = 1;
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if (argc == 2)
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{
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/* If they only gave us `-v', don't try to link
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in libg++. */
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library = 0;
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}
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}
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else if (strncmp (argv[i], "-x", 2) == 0)
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saw_speclang = 1;
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else if (((argv[i][2] == '\0'
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&& (char *)strchr ("bBVDUoeTuIYmLiA", argv[i][1]) != NULL)
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|| strcmp (argv[i], "-Xlinker") == 0
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|| strcmp (argv[i], "-Tdata") == 0))
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quote = argv[i];
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else if (library != 0 && ((argv[i][2] == '\0'
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&& (char *) 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 = 0;
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added -= 2;
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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
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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 .c or .i, 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' || argv[i][len - 1] == 'i')
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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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}
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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)
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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 + 1;
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arglist = (const char **) xmalloc (num_args * sizeof (char *));
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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)
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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)
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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.c and foo.i 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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if (argv[i][len - 1] == 'i')
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arglist[j++] = "-xc++-cpp-output";
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else
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arglist[j++] = "-xc++";
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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)
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{
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arglist[j++] = LIBSTDCXX;
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added_libraries++;
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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 && need_math)
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{
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arglist[j++] = MATH_LIBRARY;
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added_libraries++;
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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 () /* 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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