375 lines
10 KiB
C
375 lines
10 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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2007, 2008, 2009, 2010, 2011 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 3, 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 COPYING3. If not see
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<http://www.gnu.org/licenses/>. */
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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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#include "opts.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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/* Skip this option. */
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#define SKIPOPT (1<<4)
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#ifndef MATH_LIBRARY
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#define MATH_LIBRARY "m"
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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 "stdc++"
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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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#ifndef LIBSTDCXX_STATIC
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#define LIBSTDCXX_STATIC NULL
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#endif
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void
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lang_specific_driver (struct cl_decoded_option **in_decoded_options,
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unsigned int *in_decoded_options_count,
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int *in_added_libraries)
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{
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unsigned 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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/* What do with libstdc++:
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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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2 means libstdc++ is needed and should be linked statically. */
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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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/* The new argument list will be contained in this. */
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struct cl_decoded_option *new_decoded_options;
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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 struct cl_decoded_option *saw_math = NULL;
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/* "-lc" if it appears on the command line. */
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const struct cl_decoded_option *saw_libc = NULL;
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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 saw -static. */
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int static_link = 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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unsigned int argc;
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/* The argument list. */
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struct cl_decoded_option *decoded_options;
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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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unsigned int num_args = 1;
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argc = *in_decoded_options_count;
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decoded_options = *in_decoded_options;
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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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const char *arg = decoded_options[i].arg;
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if (decoded_options[i].errors & CL_ERR_MISSING_ARG)
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continue; /* Avoid examining arguments of options missing them. */
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switch (decoded_options[i].opt_index)
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{
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case OPT_nostdlib:
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case OPT_nodefaultlibs:
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library = -1;
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break;
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case OPT_l:
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if (strcmp (arg, 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 (arg, "c") == 0)
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args[i] |= WITHLIBC;
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else
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/* Unrecognized libraries (e.g. -lfoo) may require libstdc++. */
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library = (library == 0) ? 1 : library;
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break;
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case OPT_pg:
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case OPT_p:
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saw_profile_flag++;
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break;
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case OPT_x:
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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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|| strcmp (arg, "objective-c++") == 0
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|| strcmp (arg, "objective-c++-cpp-output") == 0))
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library = 1;
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saw_speclang = 1;
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break;
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case OPT_Xlinker:
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case OPT_Wl_:
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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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if (library == 0)
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library = 1;
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break;
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case OPT_c:
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case OPT_S:
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case OPT_E:
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case OPT_M:
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case OPT_MM:
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case OPT_fsyntax_only:
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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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break;
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case OPT_static:
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static_link = 1;
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break;
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case OPT_static_libgcc:
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shared_libgcc = 0;
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break;
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case OPT_static_libstdc__:
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library = library >= 0 ? 2 : library;
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args[i] |= SKIPOPT;
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break;
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case OPT_SPECIAL_input_file:
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{
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int len;
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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 (arg[0] == '\0' || arg[1] == '\0')
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continue;
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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 (arg);
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if (len > 2
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&& (arg[len - 1] == 'c'
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|| arg[len - 1] == 'i'
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|| arg[len - 1] == 'h')
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&& arg[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 (arg + (len - 2), ".H") != 0)
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&& (len <= 2 || strcmp (arg + (len - 2), ".h") != 0)
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&& (len <= 4 || strcmp (arg + (len - 4), ".hpp") != 0)
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&& (len <= 3 || strcmp (arg + (len - 3), ".hp") != 0)
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&& (len <= 4 || strcmp (arg + (len - 4), ".hxx") != 0)
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&& (len <= 4 || strcmp (arg + (len - 4), ".h++") != 0)
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&& (len <= 4 || strcmp (arg + (len - 4), ".HPP") != 0)
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&& (len <= 4 || strcmp (arg + (len - 4), ".tcc") != 0)
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&& (len <= 3 || strcmp (arg + (len - 3), ".hh") != 0))
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library = 1;
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}
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}
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break;
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}
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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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/* Add one for shared_libgcc or extra static library. */
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num_args = argc + added + need_math + (library > 0) * 4 + 1;
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new_decoded_options = XNEWVEC (struct cl_decoded_option, 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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new_decoded_options[j++] = decoded_options[i++];
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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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new_decoded_options[j] = decoded_options[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 = &decoded_options[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 = &decoded_options[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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const char *arg = decoded_options[i].arg;
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int len = strlen (arg);
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switch (arg[len - 1])
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{
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case 'c':
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generate_option (OPT_x, "c++", 1, CL_DRIVER,
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&new_decoded_options[j++]);
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break;
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case 'i':
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generate_option (OPT_x, "c++-cpp-output", 1, CL_DRIVER,
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&new_decoded_options[j++]);
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break;
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case 'h':
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generate_option (OPT_x, "c++-header", 1, CL_DRIVER,
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&new_decoded_options[j++]);
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break;
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default:
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gcc_unreachable ();
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}
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new_decoded_options[j++] = decoded_options[i];
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generate_option (OPT_x, "none", 1, CL_DRIVER,
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&new_decoded_options[j]);
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}
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if ((args[i] & SKIPOPT) != 0)
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--j;
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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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#ifdef HAVE_LD_STATIC_DYNAMIC
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if (library > 1 && !static_link)
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{
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generate_option (OPT_Wl_, LD_STATIC_OPTION, 1, CL_DRIVER,
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&new_decoded_options[j]);
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j++;
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}
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#endif
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generate_option (OPT_l,
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saw_profile_flag ? LIBSTDCXX_PROFILE : LIBSTDCXX, 1,
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CL_DRIVER, &new_decoded_options[j]);
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added_libraries++;
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j++;
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/* Add target-dependent static library, if necessary. */
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if ((static_link || library > 1) && LIBSTDCXX_STATIC != NULL)
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{
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generate_option (OPT_l, LIBSTDCXX_STATIC, 1,
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CL_DRIVER, &new_decoded_options[j]);
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added_libraries++;
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j++;
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}
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#ifdef HAVE_LD_STATIC_DYNAMIC
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if (library > 1 && !static_link)
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{
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generate_option (OPT_Wl_, LD_DYNAMIC_OPTION, 1, CL_DRIVER,
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&new_decoded_options[j]);
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j++;
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}
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#endif
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}
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if (saw_math)
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new_decoded_options[j++] = *saw_math;
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else if (library > 0 && need_math)
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{
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generate_option (OPT_l,
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saw_profile_flag ? MATH_LIBRARY_PROFILE : MATH_LIBRARY,
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1, CL_DRIVER, &new_decoded_options[j]);
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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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new_decoded_options[j++] = *saw_libc;
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if (shared_libgcc && !static_link)
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generate_option (OPT_shared_libgcc, NULL, 1, CL_DRIVER,
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&new_decoded_options[j++]);
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*in_decoded_options_count = j;
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*in_decoded_options = new_decoded_options;
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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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