Index: gcc/gcc.cc
===================================================================
--- gcc/gcc.cc.orig	2013-11-26 15:41:59.000000000 +0100
+++ gcc/gcc.cc	2013-11-26 16:40:35.780548125 +0100
@@ -258,6 +258,7 @@ static const char *replace_outfile_spec_
 static const char *remove_outfile_spec_function (int, const char **);
 static const char *version_compare_spec_function (int, const char **);
 static const char *include_spec_function (int, const char **);
+static const char *include_noerr_spec_function (int, const char **);
 static const char *find_file_spec_function (int, const char **);
 static const char *find_plugindir_spec_function (int, const char **);
 static const char *print_asm_header_spec_function (int, const char **);
@@ -1357,6 +1358,7 @@ static const struct spec_function static
   { "remove-outfile",		remove_outfile_spec_function },
   { "version-compare",		version_compare_spec_function },
   { "include",			include_spec_function },
+  { "include_noerr",            include_noerr_spec_function },
   { "find-file",		find_file_spec_function },
   { "find-plugindir",		find_plugindir_spec_function },
   { "print-asm-header",		print_asm_header_spec_function },
@@ -6480,6 +6482,8 @@ main (int argc, char **argv)
   if (access (specs_file, R_OK) == 0)
     read_specs (specs_file, true, false);
 
+  do_self_spec ("%:include_noerr(defaults.spec)%(default_spec)");
+
   /* Process any configure-time defaults specified for the command line
      options, via OPTION_DEFAULT_SPECS.  */
   for (i = 0; i < ARRAY_SIZE (option_default_specs); i++)
@@ -8401,6 +8405,21 @@ get_random_number (void)
   return ret ^ getpid ();
 }
 
+static const char *
+include_noerr_spec_function (int argc, const char **argv)
+{
+  char *file;
+
+  if (argc != 1)
+    abort ();
+
+  file = find_a_file (&startfile_prefixes, argv[0], R_OK, 0);
+  if (file)
+    read_specs (file, FALSE, TRUE);
+
+  return NULL;
+}
+
 /* %:compare-debug-dump-opt spec function.  Save the last argument,
    expected to be the last -fdump-final-insns option, or generate a
    temporary.  */