[Bug lto/89358] [8 Regression] Combining -std=c++14 and -std=c++17 objects gives ODR warnings

[cvs-commit at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89358

--- Comment #21 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The releases/gcc-8 branch has been updated by Martin Liska
<mar...@gcc.gnu.org>:

https://gcc.gnu.org/g:13ef7dc2448c0f9d8981577bb5448ee9b6842b1c

commit r8-9935-g13ef7dc2448c0f9d8981577bb5448ee9b6842b1c
Author: Martin Liska <mli...@suse.cz>
Date:   Wed Jan 15 10:41:14 2020 +0100

    Backport d2a0371d2641e85c5e6ca396029be32204d976df

        Backport from mainline
        2019-04-14  Jan Hubicka  <hubi...@ucw.cz>

        PR lto/89358
        * ipa-devirt.c (skip_in_fields_list_p): New.
        (odr_types_equivalent_p): Use it.
        Backport from mainline
        2019-04-14  Jan Hubicka  <hubi...@ucw.cz>

        PR lto/89358
        * g++.dg/lto/pr89358_0.C: New testcase.
        * g++.dg/lto/pr89358_1.C: New testcase.