From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 48) id 72269384241C; Thu, 11 Feb 2021 08:00:08 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 72269384241C From: "libor.bukata at oracle dot com" To: gcc-bugs@gcc.gnu.org Subject: [Bug libstdc++/66146] call_once not C++11-compliant on ppc64le Date: Thu, 11 Feb 2021 08:00:07 +0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: libstdc++ X-Bugzilla-Version: 5.1.0 X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: libor.bukata at oracle dot com X-Bugzilla-Status: ASSIGNED X-Bugzilla-Resolution: X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: redi at gcc dot gnu.org X-Bugzilla-Target-Milestone: 11.0 X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: Message-ID: In-Reply-To: References: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/ Auto-Submitted: auto-generated MIME-Version: 1.0 X-BeenThere: gcc-bugs@gcc.gnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Gcc-bugs mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 11 Feb 2021 08:00:08 -0000 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D66146 --- Comment #39 from Libor Bukata --- (In reply to Libor Bukata from comment #38) > (In reply to Jonathan Wakely from comment #34) > > Untested sketch of a solution for Solaris and BSDs: > > https://gcc.gnu.org/pipermail/gcc-patches/2020-November/557928.html >=20 > Thank you for the patch, I will test it on Solaris > and let you know when I have the results. Patched GCC master with Jonathan's patch, but unfortunately it is not compilable on Solaris 11: In file included from /gcc_nightly/build/sparcv9/sparcv9-sun-solaris2.11/libstdc++-v3/include/spa= rcv9-sun-solaris2.11/bits/c++config.h:568, from /gcc_nightly/build/sparcv9/sparcv9-sun-solaris2.11/libstdc++-v3/include/cas= sert:43, from /gcc_nightly/gcc-11.0.0-master/libstdc++-v3/include/precompiled/stdc++.h:33: /gcc_nightly/build/sparcv9/sparcv9-sun-solaris2.11/libstdc++-v3/include/mut= ex:861:10: error: token "{" is not valid in preprocessor expressions 861 | || _GLIBCXX_COMPAT_PTHREAD_ONCE_T | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ In file included from /gcc_nightly/build/sparcv9/sparcv9-sun-solaris2.11/libstdc++-v3/include/spa= rcv9-sun-solaris2.11/bits/c++config.h:568, from /gcc_nightly/build/sparcv9/sparcv9-sun-solaris2.11/libstdc++-v3/include/cas= sert:43, from /gcc_nightly/gcc-11.0.0-master/libstdc++-v3/include/precompiled/stdc++.h:33: /gcc_nightly/build/sparcv9/sparcv9-sun-solaris2.11/libstdc++-v3/include/mut= ex:861:10: error: token "{" is not valid in preprocessor expressions 861 | || _GLIBCXX_COMPAT_PTHREAD_ONCE_T | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ In file included from /gcc_nightly/build/sparcv9/sparcv9-sun-solaris2.11/libstdc++-v3/include/fut= ure:38, from /gcc_nightly/gcc-11.0.0-master/libstdc++-v3/include/precompiled/stdc++.h:10= 5: /gcc_nightly/build/sparcv9/sparcv9-sun-solaris2.11/libstdc++-v3/include/mut= ex:675:15: error: explicitly defaulted function 'constexpr std::once_flag::once_flag()' cannot be declared 'constexpr' because the implicit declaration is not 'constexpr': 675 | constexpr once_flag() noexcept =3D default; | ^~~~~~~~~ /gcc_nightly/build/sparcv9/sparcv9-sun-solaris2.11/libstdc++-v3/include/mut= ex:699:12: note: defaulted constructor calls non-'constexpr' 'std::once_flag::_Once::_Once()' 699 | struct _Once _GLIBCXX_COMPAT_PTHREAD_ONCE_T; Note that there was a merge conflict with the current master, however, its resolution was straightforward. If there is an updated patch, I will be hap= py to test it as well.=