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/* Specific flags and argument handling of the C preprocessor.
Copyright (C) 1999, 2007, 2010 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 3, 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 COPYING3. If not see
<http://www.gnu.org/licenses/>. */
#include "config.h"
#include "system.h"
#include "coretypes.h"
#include "tm.h"
#include "gcc.h"
/* The `cpp' executable installed in $(bindir) and $(cpp_install_dir)
is a customized version of the gcc driver. It forces -E; -S and -c
are errors. It defaults to -x c for files with unrecognized
extensions, unless -x options appear in argv, in which case we
assume the user knows what they're doing. If no explicit input is
mentioned, it will read stdin. */
#ifndef SWITCH_TAKES_ARG
#define SWITCH_TAKES_ARG(CHAR) DEFAULT_SWITCH_TAKES_ARG(CHAR)
#endif
#ifndef WORD_SWITCH_TAKES_ARG
#define WORD_SWITCH_TAKES_ARG(STR) DEFAULT_WORD_SWITCH_TAKES_ARG (STR)
#endif
/* Suffixes for known sorts of input files. Note that we do not list
files which are normally considered to have been preprocessed already,
since the user's expectation is that `cpp' always preprocesses. */
static const char *const known_suffixes[] =
{
".c", ".C", ".S", ".m",
".cc", ".cxx", ".cpp", ".cp", ".c++",
".sx",
NULL
};
/* Filter argc and argv before processing by the gcc driver proper. */
void
lang_specific_driver (int *in_argc, const char *const **in_argv,
int *in_added_libraries ATTRIBUTE_UNUSED)
{
int argc = *in_argc;
const char *const *argv = *in_argv;
/* Do we need to read stdin? */
int read_stdin = 1;
/* Do we need to insert -E? */
int need_E = 1;
/* Have we seen an input file? */
int seen_input = 0;
/* Positions to insert -xc, -xassembler-with-cpp, and -o, if necessary.
0 means unnecessary. */
int lang_c_here = 0;
int lang_S_here = 0;
int o_here = 0;
/* Do we need to fix up an input file with an unrecognized suffix? */
int need_fixups = 1;
int i, j, quote = 0;
const char **new_argv;
int new_argc;
extern int is_cpp_driver;
is_cpp_driver = 1;
/* First pass. If we see an -S or -c, barf. If we see an input file,
turn off read_stdin. If we see a second input file, it is actually
the output file. If we see a third input file, barf. */
for (i = 1; i < argc; i++)
{
if (quote == 1)
{
quote = 0;
continue;
}
if (argv[i][0] == '-')
{
if (argv[i][1] == '\0')
read_stdin = 0;
else if (argv[i][2] == '\0')
{
if (argv[i][1] == 'E')
need_E = 0;
else if (argv[i][1] == 'S' || argv[i][1] == 'c')
{
fatal_error ("%qs is not a valid option to the "
"preprocessor", argv[i]);
return;
}
else if (argv[i][1] == 'x')
{
need_fixups = 0;
quote = 1;
}
else if (SWITCH_TAKES_ARG (argv[i][1]))
quote = 1;
}
else if (argv[i][1] == 'x')
need_fixups = 0;
else if (WORD_SWITCH_TAKES_ARG (&argv[i][1]))
quote = 1;
}
else /* not an option */
{
seen_input++;
if (seen_input == 3)
{
fatal_error ("too many input files");
return;
}
else if (seen_input == 2)
{
o_here = i;
}
else
{
read_stdin = 0;
if (need_fixups)
{
int l = strlen (argv[i]);
int known = 0;
const char *const *suff;
for (suff = known_suffixes; *suff; suff++)
if (!strcmp (*suff, &argv[i][l - strlen(*suff)]))
{
known = 1;
break;
}
if (! known)
{
/* .s files are a special case; we have to treat
them like .S files so -D__ASSEMBLER__ will be
in effect. */
if (!strcmp (".s", &argv[i][l - 2]))
lang_S_here = i;
else
lang_c_here = i;
}
}
}
}
}
/* If we don't need to edit the command line, we can bail early. */
new_argc = argc + need_E + read_stdin
+ !!o_here + !!lang_c_here + !!lang_S_here;
if (new_argc == argc)
return;
/* One more slot for a terminating null. */
new_argv = XNEWVEC (const char *, new_argc + 1);
new_argv[0] = argv[0];
j = 1;
if (need_E)
new_argv[j++] = "-E";
for (i = 1; i < argc; i++, j++)
{
if (i == lang_c_here)
new_argv[j++] = "-xc";
else if (i == lang_S_here)
new_argv[j++] = "-xassembler-with-cpp";
else if (i == o_here)
new_argv[j++] = "-o";
new_argv[j] = argv[i];
}
if (read_stdin)
new_argv[j++] = "-";
new_argv[j] = NULL;
*in_argc = new_argc;
*in_argv = new_argv;
}
/* Called before linking. Returns 0 on success and -1 on failure. */
int lang_specific_pre_link (void)
{
return 0; /* Not used for cpp. */
}
/* Number of extra output files that lang_specific_pre_link may generate. */
int lang_specific_extra_outfiles = 0; /* Not used for cpp. */
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