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From: "tschwinge at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug libstdc++/66146] call_once not C++11-compliant on ppc64le Date: Thu, 17 Dec 2020 09:08:38 +0000 [thread overview] Message-ID: <bug-66146-4-EdxyjlXP6l@http.gcc.gnu.org/bugzilla/> (raw) In-Reply-To: <bug-66146-4@http.gcc.gnu.org/bugzilla/> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66146 Thomas Schwinge <tschwinge at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |tschwinge at gcc dot gnu.org --- Comment #35 from Thomas Schwinge <tschwinge at gcc dot gnu.org> --- In an '--enable-werror' configuration (assuming that's relevant), I'm seeing new code from commit r11-4691-g93e79ed391b9c636f087e6eb7e70f14963cd10ad "libstdc++: Rewrite std::call_once to use futexes [PR 66146]" fail to build: [...]/source-gcc/libstdc++-v3/src/c++11/mutex.cc: In member function ‘void std::once_flag::_M_finish(bool)’: [...]/source-gcc/libstdc++-v3/src/c++11/mutex.cc:77:11: error: unused variable ‘prev’ [-Werror=unused-variable] 77 | int prev = __atomic_exchange_n(&_M_once, newval, __ATOMIC_RELEASE); | ^~~~ cc1plus: all warnings being treated as errors Makefile:648: recipe for target 'mutex.lo' failed make[5]: *** [mutex.lo] Error 1 make[5]: Leaving directory '[...]/build-gcc/x86_64-pc-linux-gnu/libstdc++-v3/src/c++11' Should a '(void) prev;' be added (my current workaround), or 'prev' get some attribute 'used' added, or something else?
next prev parent reply other threads:[~2020-12-17 9:08 UTC|newest] Thread overview: 47+ messages / expand[flat|nested] mbox.gz Atom feed top 2015-05-14 18:31 [Bug libstdc++/66146] New: " andrey.vul at gmail dot com 2015-05-15 8:55 ` [Bug libstdc++/66146] " redi at gcc dot gnu.org 2015-05-15 15:12 ` andrey.vul at gmail dot com 2015-05-15 17:40 ` msebor at gcc dot gnu.org 2015-05-15 20:31 ` redi at gcc dot gnu.org 2015-05-19 17:36 ` andrey.vul at gmail dot com 2015-05-20 0:11 ` msebor at gcc dot gnu.org 2015-05-20 14:12 ` redi at gcc dot gnu.org 2015-05-20 14:36 ` bugdal at aerifal dot cx 2015-05-20 14:46 ` jakub at gcc dot gnu.org 2015-05-20 14:47 ` redi at gcc dot gnu.org 2015-05-20 14:51 ` bugdal at aerifal dot cx 2020-05-07 11:56 ` jakub at gcc dot gnu.org 2020-06-27 18:18 ` pdimov at gmail dot com 2020-07-09 8:52 ` redi at gcc dot gnu.org 2020-08-27 13:56 ` kisha-nik at mail dot ru 2020-11-03 14:51 ` redi at gcc dot gnu.org 2020-11-03 18:45 ` cvs-commit at gcc dot gnu.org 2020-11-03 18:46 ` redi at gcc dot gnu.org 2020-11-03 18:46 ` redi at gcc dot gnu.org 2020-11-03 20:17 ` redi at gcc dot gnu.org 2020-12-17 9:08 ` tschwinge at gcc dot gnu.org [this message] 2020-12-17 9:58 ` redi at gcc dot gnu.org 2020-12-17 14:03 ` cvs-commit at gcc dot gnu.org 2021-02-04 15:16 ` libor.bukata at oracle dot com 2021-02-11 8:00 ` libor.bukata at oracle dot com 2021-02-11 13:29 ` redi at gcc dot gnu.org 2021-02-15 13:03 ` redi at gcc dot gnu.org 2021-02-15 14:13 ` bugdal at aerifal dot cx 2021-02-15 15:00 ` redi at gcc dot gnu.org 2021-02-15 17:08 ` bugdal at aerifal dot cx 2021-02-15 17:10 ` fw at gcc dot gnu.org 2021-02-15 17:30 ` bugdal at aerifal dot cx 2021-03-16 12:39 ` cvs-commit at gcc dot gnu.org 2021-04-07 6:22 ` unlvsur at live dot com 2021-04-07 10:03 ` redi at gcc dot gnu.org 2021-04-19 10:40 ` redi at gcc dot gnu.org 2021-04-27 11:37 ` jakub at gcc dot gnu.org 2021-07-28 7:04 ` rguenth at gcc dot gnu.org 2022-02-10 23:20 ` redi at gcc dot gnu.org 2022-02-10 23:29 ` redi at gcc dot gnu.org 2022-12-02 1:25 ` lh_mouse at 126 dot com 2022-12-03 9:26 ` redi at gcc dot gnu.org 2024-03-14 11:55 ` cvs-commit at gcc dot gnu.org 2024-03-18 11:22 ` cvs-commit at gcc dot gnu.org 2024-03-18 14:03 ` cvs-commit at gcc dot gnu.org 2024-05-13 9:04 ` [Bug libstdc++/66146] call_once not C++11-compliant iains at gcc dot gnu.org
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