PATCH: lto/55474: global-buffer-overflow in lto-wrapper.c

[H.J. Lu]

Hi,

OPT_SPECIAL_unknown, OPT_SPECIAL_ignore, OPT_SPECIAL_program_name and
OPT_SPECIAL_input_file are special options, which aren't in cl_options.
This patch avoids

if (!(cl_options[foption->opt_index].flags & CL_TARGET))

on them.  This patch skips them.  OK to install?

Thanks.


H.J.
---
2012-11-26  H.J. Lu  <hongjiu...@intel.com>

        PR lto/55474
        * lto-wrapper.c (merge_and_complain): Handle
        OPT_SPECIAL_unknown, OPT_SPECIAL_ignore,
        OPT_SPECIAL_program_name and OPT_SPECIAL_input_file.

diff --git a/gcc/lto-wrapper.c b/gcc/lto-wrapper.c
index 1f4d212..24de743 100644
--- a/gcc/lto-wrapper.c
+++ b/gcc/lto-wrapper.c
@@ -393,6 +393,12 @@ merge_and_complain (struct cl_decoded_option 
**decoded_options,
       struct cl_decoded_option *foption = &fdecoded_options[i];
       switch (foption->opt_index)
        {
+       case OPT_SPECIAL_unknown:
+       case OPT_SPECIAL_ignore:
+       case OPT_SPECIAL_program_name:
+       case OPT_SPECIAL_input_file:
+         break;
+
        default:
          if (!(cl_options[foption->opt_index].flags & CL_TARGET))
            break;