Fix problem reported by Dan Berlin on gcc list.

* c-opt.c (c_common_post_options): If this_input_filename is NULL,
increment errorcount and return false instead of true.

From-SVN: r80678

gcc/ChangeLog

+2004-04-13  James E Wilson  <wilson@specifixinc.com>
+
+	* c-opt.c (c_common_post_options): If this_input_filename is NULL,
+	increment errorcount and return false instead of true.
+
 2004-04-13  Uros Bizjak  <uros@kss-loka.si>:
 
 	* optabs.c (expand_twoval_unop): Reorder function arguments.

gcc/c-opts.c

@@ -1171,8 +1171,12 @@ c_common_post_options (const char **pfilename)
 
   *pfilename = this_input_filename
     = cpp_read_main_file (parse_in, in_fnames[0]);
+  /* Don't do any compilation or preprocessing if there is no input file.  */
   if (this_input_filename == NULL)
-    return true;
+    {
+      errorcount++;
+      return false;
+    }
 
   if (flag_working_directory
       && flag_preprocess_only && ! flag_no_line_commands)