/* 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++. */