[Bug c/81854] weak alias of an incompatible symbol accepted

[msebor at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81854

--- Comment #5 from Martin Sebor <msebor at gcc dot gnu.org> ---
Author: msebor
Date: Tue Sep 19 14:27:32 2017
New Revision: 252976

URL: https://gcc.gnu.org/viewcvs?rev=252976&root=gcc&view=rev
Log:
PR c/81854 - weak alias of an incompatible symbol accepted

gcc/ChangeLog:

        PR c/81854
        * cgraphunit.c (handle_alias_pairs): Reject aliases between functions
        of incompatible types.

gcc/testsuite/ChangeLog:

        PR c/81854
        * gcc.dg/pr81854.c: New test.
        * g++.dg/ext/attr-ifunc-5.C: New test.
        * g++.dg/ext/attr-ifunc-1.C: Adjust.
        * g++.dg/ext/attr-ifunc-2.C: Same.
        * g++.dg/ext/attr-ifunc-3.C: Same.
        * g++.dg/ext/attr-ifunc-4.C: Same.
        * g++.old-deja/g++.abi/vtable2.C: Same.
        * gcc.dg/attr-ifunc-1.c: Same.

Added:
    trunk/gcc/testsuite/g++.dg/ext/attr-ifunc-5.C
    trunk/gcc/testsuite/gcc.dg/pr81854.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/cgraphunit.c
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/testsuite/g++.dg/ext/attr-ifunc-1.C
    trunk/gcc/testsuite/g++.dg/ext/attr-ifunc-2.C
    trunk/gcc/testsuite/g++.dg/ext/attr-ifunc-3.C
    trunk/gcc/testsuite/g++.dg/ext/attr-ifunc-4.C
    trunk/gcc/testsuite/g++.old-deja/g++.abi/vtable2.C
    trunk/gcc/testsuite/gcc.dg/attr-ifunc-1.c