--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/cppspec.c	Fri Jul 17 14:47:48 2009 +0900
@@ -0,0 +1,210 @@
+/* Specific flags and argument handling of the C preprocessor.
+   Copyright (C) 1999, 2007 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 ("\"%s\" 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 ("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.  */