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/* Specific flags and argument handling of the C++ front-end.
Copyright (C) 1996, 1997, 1998, 1999 Free Software Foundation, Inc.
This file is part of GNU CC.
GNU CC 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.
GNU CC 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 GNU CC; see the file COPYING. If not, write to
the Free Software Foundation, 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#include "config.h"
#include "system.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 LIBSTDCXX
#define LIBSTDCXX "-lstdc++"
#endif
void
lang_specific_driver (fn, in_argc, in_argv, in_added_libraries)
void (*fn)();
int *in_argc;
char ***in_argv;
int *in_added_libraries;
{
int i, j;
/* If non-zero, the user gave us the `-v' flag. */
int saw_verbose_flag = 0;
/* This will be 0 if we encounter a situation where we should not
link in libstdc++. */
int library = 1;
/* 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 = 2;
/* Used to track options that take arguments, so we don't go wrapping
those with -xc++/-xnone. */
char *quote = NULL;
/* The new argument list will be contained in this. */
char **arglist;
/* Non-zero 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. */
char *saw_math = 0;
/* "-lc" if it appears on the command line. */
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');
/* The total number of arguments with the new stuff. */
int argc;
/* The argument list. */
char **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 = (int *) xmalloc (argc * sizeof (int));
bzero ((char *) args, argc * sizeof (int));
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 (library != 0 && (strcmp (argv[i], "-nostdlib") == 0
|| strcmp (argv[i], "-nodefaultlibs") == 0))
{
library = 0;
}
else if (strcmp (argv[i], "-shared") == 0)
{
library = 0;
}
else if (strcmp (argv[i], "-lm") == 0
|| strcmp (argv[i], "-lmath") == 0
|| strcmp (argv[i], MATH_LIBRARY) == 0
#ifdef ALT_LIBM
|| strcmp (argv[i], ALT_LIBM) == 0
#endif
)
{
args[i] |= MATHLIB;
need_math = 0;
}
else if (strcmp (argv[i], "-lc") == 0)
args[i] |= WITHLIBC;
else if (strcmp (argv[i], "-v") == 0)
{
saw_verbose_flag = 1;
if (argc == 2)
{
/* If they only gave us `-v', don't try to link
in libg++. */
library = 0;
}
}
else if (strncmp (argv[i], "-x", 2) == 0)
saw_speclang = 1;
else if (((argv[i][2] == '\0'
&& (char *)strchr ("bBVDUoeTuIYmLiA", argv[i][1]) != NULL)
|| strcmp (argv[i], "-Tdata") == 0))
quote = argv[i];
else if (library != 0 && ((argv[i][2] == '\0'
&& (char *) strchr ("cSEM", argv[i][1]) != NULL)
|| strcmp (argv[i], "-MM") == 0))
{
/* Don't specify libraries if we won't link, since that would
cause a warning. */
library = 0;
added -= 2;
}
else
/* Pass other options through. */
continue;
}
else
{
int len;
if (saw_speclang)
{
saw_speclang = 0;
continue;
}
/* If the filename ends in .c or .i, 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 - 2] == '.')
{
args[i] |= LANGSPEC;
added += 2;
}
}
}
if (quote)
(*fn) ("argument to `%s' missing\n", quote);
/* If we know we don't have to do anything, bail now. */
if (! added && ! library)
{
free (args);
return;
}
num_args = argc + added + need_math;
arglist = (char **) xmalloc (num_args * sizeof (char *));
/* NOTE: We start at 1 now, not 0. */
for (i = 0, j = 0; i < argc; i++, j++)
{
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)
{
--j;
saw_math = argv[i];
}
if (!saw_libc && (args[i] & WITHLIBC) && library)
{
--j;
saw_libc = argv[i];
}
/* Wrap foo.c and foo.i 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]);
if (argv[i][len - 1] == 'i')
arglist[j++] = "-xc++-cpp-output";
else
arglist[j++] = "-xc++";
arglist[j++] = argv[i];
arglist[j] = "-xnone";
}
}
/* Add `-lstdc++' if we haven't already done so. */
if (library)
{
arglist[j++] = LIBSTDCXX;
added_libraries++;
}
if (saw_math)
arglist[j++] = saw_math;
else if (library && need_math)
{
arglist[j++] = MATH_LIBRARY;
added_libraries++;
}
if (saw_libc)
arglist[j++] = saw_libc;
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 () /* 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++. */
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