+++ /dev/null
-Index: gcc-4.2/gcc/gengtype-lex.l
-===================================================================
---- gcc-4.2/gcc/gengtype-lex.l (revision 121000)
-+++ gcc-4.2/gcc/gengtype-lex.l (working copy)
-@@ -535,13 +535,19 @@
- macro_input (char *buffer, unsigned size)
- {
- unsigned result;
-+ int old_errno;
-
- result = fread (buffer, 1, size, yyin);
-+ old_errno = errno;
- if (result)
- /*NOP*/;
-- else if (ferror (yyin))
-- YY_FATAL_ERROR ("read of source file failed");
-- else if (macro_expns)
-+ else if (ferror (yyin)) {
-+ char *err_msg;
-+ err_msg = xasprintf ("read of source file '%s:%d' failed",
-+ lexer_line.file,
-+ lexer_line.line);
-+ YY_FATAL_ERROR (err_msg);
-+ } else if (macro_expns)
- {
- const char *expn;
- unsigned len;