On Mon, Jan 16, 2012 at 10:29 PM, Jason Merrill <ja...@redhat.com> wrote:
> When outputting PCH/LTO, the compiler tries to generate mangled names for
> all decls before discarding language-specific data. But that doesn't make
> sense for templates, and leads to conflicts in this case. Fixed by refusing
> to mangle templates.
>
> Tested x86_64-pc-linux-gnu, applying to trunk.
Hmm. Using -flto when generating a precompiled header doesn't make sense.
We probably should drop -flto silently or complain here. Thus,
Index: c-family/c-opts.c
===================================================================
--- c-family/c-opts.c (revision 183205)
+++ c-family/c-opts.c (working copy)
@@ -1058,6 +1058,13 @@ c_common_post_options (const char **pfil
&& flag_preprocess_only && !flag_no_line_commands)
pp_dir_change (parse_in, get_src_pwd ());
+ /* Disable LTO output when outputting a precompiled header. */
+ if (pch_file && flag_lto)
+ {
+ flag_lto = 0;
+ flag_generate_lto = 0;
+ }
+
return flag_preprocess_only;
}
any objection to that?
Thanks,
Richard.
