From owner-freebsd-bugs@freebsd.org Tue Jan 15 14:57:53 2019 Return-Path: Delivered-To: freebsd-bugs@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 8A915148D22D for ; Tue, 15 Jan 2019 14:57:53 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from mailman.ysv.freebsd.org (mailman.ysv.freebsd.org [IPv6:2001:1900:2254:206a::50:5]) by mx1.freebsd.org (Postfix) with ESMTP id 250878A87B for ; Tue, 15 Jan 2019 14:57:53 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: by mailman.ysv.freebsd.org (Postfix) id DCCC5148D22C; Tue, 15 Jan 2019 14:57:52 +0000 (UTC) Delivered-To: bugs@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id CB2D5148D22B for ; Tue, 15 Jan 2019 14:57:52 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from mxrelay.ysv.freebsd.org (mxrelay.ysv.freebsd.org [IPv6:2001:1900:2254:206a::19:3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) server-signature RSA-PSS (4096 bits) client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "mxrelay.ysv.freebsd.org", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 6A1418A87A for ; Tue, 15 Jan 2019 14:57:52 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org (kenobi.freebsd.org [IPv6:2001:1900:2254:206a::16:76]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mxrelay.ysv.freebsd.org (Postfix) with ESMTPS id 3C7EF212C4 for ; Tue, 15 Jan 2019 14:57:51 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org ([127.0.1.118]) by kenobi.freebsd.org (8.15.2/8.15.2) with ESMTP id x0FEvpZm087184 for ; Tue, 15 Jan 2019 14:57:51 GMT (envelope-from bugzilla-noreply@freebsd.org) Received: (from www@localhost) by kenobi.freebsd.org (8.15.2/8.15.2/Submit) id x0FEvpKw087182 for bugs@FreeBSD.org; Tue, 15 Jan 2019 14:57:51 GMT (envelope-from bugzilla-noreply@freebsd.org) X-Authentication-Warning: kenobi.freebsd.org: www set sender to bugzilla-noreply@freebsd.org using -f From: bugzilla-noreply@freebsd.org To: bugs@FreeBSD.org Subject: [Bug 234976] Clang: undefined reference to __atomic_exchange and __atomic_load Date: Tue, 15 Jan 2019 14:57:51 +0000 X-Bugzilla-Reason: AssignedTo X-Bugzilla-Type: new X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: Base System X-Bugzilla-Component: misc X-Bugzilla-Version: 12.0-RELEASE X-Bugzilla-Keywords: X-Bugzilla-Severity: Affects Some People X-Bugzilla-Who: vallentin@icir.org X-Bugzilla-Status: New X-Bugzilla-Resolution: X-Bugzilla-Priority: --- X-Bugzilla-Assigned-To: bugs@FreeBSD.org X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: bug_id short_desc product version rep_platform op_sys bug_status bug_severity priority component assigned_to reporter Message-ID: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: https://bugs.freebsd.org/bugzilla/ Auto-Submitted: auto-generated MIME-Version: 1.0 X-BeenThere: freebsd-bugs@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Bug reports List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 15 Jan 2019 14:57:53 -0000 https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D234976 Bug ID: 234976 Summary: Clang: undefined reference to __atomic_exchange and __atomic_load Product: Base System Version: 12.0-RELEASE Hardware: Any OS: Any Status: New Severity: Affects Some People Priority: --- Component: misc Assignee: bugs@FreeBSD.org Reporter: vallentin@icir.org I'm having trouble with compiling the following code snippet: #include #include struct sixteen { uint64_t x =3D 1; int64_t y =3D -1; }; std::atomic x; int main() { auto v =3D x.load(std::memory_order_relaxed); return std::atomic_is_lock_free(&x); } I've attempted to compile this as follows: c++ -std=3Dc++17 -stdlib=3Dlibc++ test.cpp /tmp/test-3fe722.o: In function `main': test.cpp:(.text+0x34): undefined reference to `__atomic_load' test.cpp:(.text+0x86): undefined reference to `__atomic_is_lock_free' c++: error: linker command failed with exit code 1 (use -v to see invocatio= n) The same snippet compiles fine with GCC 8 and -latomic. This issue appears to be related to bug #233725 and bug #220822. --=20 You are receiving this mail because: You are the assignee for the bug.=