re PR fortran/58226 (negative subscript pos at fortran/options.c:1205)

2013-10-09  Tobias Burnus  <burnus@net-b.de>

        PR fortran/58226
        * options.c (gfc_get_option_string): Handle zero arg case.

From-SVN: r203394

gcc/fortran/ChangeLog

+2013-10-10  Tobias Burnus  <burnus@net-b.de>
+
+	PR fortran/58226
+	* options.c (gfc_get_option_string): Handle zero arg case.
+
 2013-10-02  Tobias Burnus  <burnus@net-b.de>
 
 	PR fortran/58593

gcc/fortran/options.c

@@ -1166,6 +1166,10 @@ gfc_get_option_string (void)
   size_t len, pos;
   char *result;
 
+  /* Allocate and return a one-character string with '\0'.  */
+  if (!save_decoded_options_count)
+    return XCNEWVEC (char, 1);
+
   /* Determine required string length.  */
 
   len = 0;