re PR preprocessor/21250 (line number 0 for <built-in> causes GAS to complain)

	PR preprocessor/21250
	* c-ppoutput.c (print_line): Print internal line 0 as 1.

From-SVN: r105408

gcc/ChangeLog

+2005-10-14  Per Bothner  <per@bothner.com>
+
+	PR preprocessor/21250
+	* c-ppoutput.c (print_line): Print internal line 0 as 1.
+
 2005-10-14  Nathan Sidwell  <nathan@codesourcery.com>
 
 	PR c++/22551

gcc/c-ppoutput.c

@@ -256,7 +256,8 @@ print_line (source_location src_loc, const char *special_flags)
       p = cpp_quote_string (to_file_quoted,
 			    (unsigned char *) map->to_file, to_file_len);
       *p = '\0';
-      fprintf (print.outf, "# %u \"%s\"%s", print.src_line,
+      fprintf (print.outf, "# %u \"%s\"%s",
+	       print.src_line == 0 ? 1 : print.src_line,
 	       to_file_quoted, special_flags);
 
       if (map->sysp == 2)