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From: "ro at CeBiTec dot Uni-Bielefeld.DE" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/49568] [4.7 regression] g++.dg/torture/pr41257-2.C FAILs to link on Tru64 UNIX
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49568

--- Comment #9 from ro at CeBiTec dot Uni-Bielefeld.DE <ro at CeBiTec dot Uni-Bielefeld.DE> 2011-07-04 17:24:39 UTC ---
> The following patch should fix the problem:
> Index: ipa.c
> ===================================================================
> --- ipa.c       (revision 175748)
> +++ ipa.c       (working copy)
> @@ -871,9 +871,9 @@ function_and_variable_visibility (bool w
>
>              We also need to arrange the thunk into the same comdat group as
>              the function it reffers to.  */
> +          DECL_COMDAT (node->decl) = DECL_COMDAT (decl_node->decl);
>           if (DECL_ONE_ONLY (decl_node->decl))
>             {
> -             DECL_COMDAT (node->decl) = DECL_COMDAT (decl_node->decl);
>               DECL_COMDAT_GROUP (node->decl) = DECL_COMDAT_GROUP
> (decl_node->decl);
>               if (DECL_ONE_ONLY (decl_node->decl) && !node->same_comdat_group)
>                 {

It does indeed and introduces no regressions.

Thanks.
        Rainer