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-rw-r--r--gcc-4.9/gcc/c-family/cppspec.c198
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diff --git a/gcc-4.9/gcc/c-family/cppspec.c b/gcc-4.9/gcc/c-family/cppspec.c
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+/* Specific flags and argument handling of the C preprocessor.
+ Copyright (C) 1999-2014 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"
+#include "opts.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. */
+
+/* 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 the command line before processing by the gcc driver proper. */
+void
+lang_specific_driver (struct cl_decoded_option **in_decoded_options,
+ unsigned int *in_decoded_options_count,
+ int *in_added_libraries ATTRIBUTE_UNUSED)
+{
+ struct cl_decoded_option *decoded_options = *in_decoded_options;
+ unsigned int argc = *in_decoded_options_count;
+
+ /* 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. */
+ unsigned int lang_c_here = 0;
+ unsigned int lang_S_here = 0;
+ unsigned int o_here = 0;
+
+ /* Do we need to fix up an input file with an unrecognized suffix? */
+ int need_fixups = 1;
+
+ unsigned int i, j;
+ struct cl_decoded_option *new_decoded_options;
+ unsigned 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++)
+ {
+ switch (decoded_options[i].opt_index)
+ {
+ case OPT_E:
+ need_E = 0;
+ break;
+
+ case OPT_S:
+ case OPT_c:
+ fatal_error ("%qs is not a valid option to the preprocessor",
+ decoded_options[i].orig_option_with_args_text);
+ return;
+
+ case OPT_x:
+ need_fixups = 0;
+ break;
+
+ case OPT_SPECIAL_input_file:
+ {
+ const char *file = decoded_options[i].arg;
+
+ if (strcmp (file, "-") == 0)
+ read_stdin = 0;
+ else
+ {
+ 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 (file);
+ int known = 0;
+ const char *const *suff;
+
+ for (suff = known_suffixes; *suff; suff++)
+ if (!strcmp (*suff, &file[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", &file[l - 2]))
+ lang_S_here = i;
+ else
+ lang_c_here = i;
+ }
+ }
+ }
+ }
+ }
+ break;
+ }
+ }
+
+ /* If we don't need to edit the command line, we can bail early. */
+
+ new_argc = argc + need_E + read_stdin + !!lang_c_here + !!lang_S_here;
+
+ if (new_argc == argc && !o_here)
+ return;
+
+ new_decoded_options = XNEWVEC (struct cl_decoded_option, new_argc);
+
+ new_decoded_options[0] = decoded_options[0];
+ j = 1;
+
+ if (need_E)
+ generate_option (OPT_E, NULL, 1, CL_DRIVER, &new_decoded_options[j++]);
+
+ for (i = 1; i < argc; i++, j++)
+ {
+ if (i == lang_c_here)
+ generate_option (OPT_x, "c", 1, CL_DRIVER, &new_decoded_options[j++]);
+ else if (i == lang_S_here)
+ generate_option (OPT_x, "assembler-with-cpp", 1, CL_DRIVER,
+ &new_decoded_options[j++]);
+ else if (i == o_here)
+ {
+ generate_option (OPT_o, decoded_options[i].arg, 1, CL_DRIVER,
+ &new_decoded_options[j]);
+ continue;
+ }
+
+ new_decoded_options[j] = decoded_options[i];
+ }
+
+ if (read_stdin)
+ generate_option_input_file ("-", &new_decoded_options[j++]);
+
+ *in_decoded_options_count = new_argc;
+ *in_decoded_options = new_decoded_options;
+}
+
+/* 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. */