[Bug other/31071] New: A discrepancy in handling %{...} and %W{...} in function do_spec_1

["wuhui1973 at 21cn dot com" <gcc-bugzilla at gcc dot gnu dot org>]

In spec langauge, %{...} and %W{...} are exactly same, except that %W{...} mark
last argument supplied within as a file to be deleted on failure. According to
this definition, the handling of these two commands is descrepant.

In do_spec_1, the handling of %W{...} is:
4943   case 'W':
       {
          int cur_index = argbuf_index;
          /* Handle the {...} following the %W.  */
          if (*p != '{')
            fatal ("spec '%s' has invalid '%%W%c", spec, *p);
          p = handle_braces (p + 1);
          if (p == 0)
            return -1;
          /* End any pending argument.  */
4953      if (arg_going)
          {
            obstack_1grow (&obstack, 0);
            string = XOBFINISH (&obstack, const char *);
            if (this_is_library_file)
              string = find_file (string);
            store_arg (string, delete_this_arg, this_is_output_file);
            if (this_is_output_file)
              outfiles[input_file_number] = string;
            arg_going = 0;
4963      }
          /* If any args were output, mark the last one for deletion
             on failure.  */
          if (argbuf_index != cur_index)
            record_temp_file (argbuf[argbuf_index - 1], 0, 1);
          break;
       }

This processing I think is correct. 
However for %{...}, that is:
5111   case '{':
          p = handle_braces (p);
          if (p == 0)
            return -1;
5115      break;

It's possible for the last pending argument being lose. So suggest add
statements  same of line 4953 to 4963 before 5115


-- 
           Summary: A discrepancy in handling %{...} and %W{...} in function
                    do_spec_1
           Product: gcc
           Version: 4.1.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: other
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: wuhui1973 at 21cn dot com


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=31071