Date: Sat, 20 Apr 2024 10:36:46 +0000 From: bugzilla-noreply@freebsd.org To: ports-bugs@FreeBSD.org Subject: [Bug 276104] [exp-run] Against llvm-18-update branch on GitHub Message-ID: <bug-276104-7788-LL17G6fKlz@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-276104-7788@https.bugs.freebsd.org/bugzilla/> References: <bug-276104-7788@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D276104 --- Comment #121 from commit-hook@FreeBSD.org --- A commit in branch stable/13 references this bug: URL: https://cgit.FreeBSD.org/src/commit/?id=3D64816cf50d5e571e64f5d8a4143f05192= 788d09b commit 64816cf50d5e571e64f5d8a4143f05192788d09b Author: Dimitry Andric <dim@FreeBSD.org> AuthorDate: 2024-03-19 13:07:27 +0000 Commit: Dimitry Andric <dim@FreeBSD.org> CommitDate: 2024-04-19 21:24:48 +0000 Revert commit 6255157d24e2 from llvm-project (by Dimitry Andric): [libc++] Re-enable std::pair trivial copy constructor for FreeBSD >= =3D 14 After many years of using the really old std::pair ABI which did not = yet have a trivial copy constructor, FreeBSD 14 and later will finally get rid of it. Only use the old ABI for FreeBSD 13 and earlier. Note: on the FreeBSD side, we will bump our libc++.so version for thi= s, and keep an old compatibility library in a separate package. Differential Revision: https://reviews.llvm.org/D126462 This ABI change can cause crashes when binaries compiled against older libc++ versions are run against binaries compiled against this libc++ version. For example, lang/ldc uses a precompiled bootstrap ldc2 binary that was compiled against the old libc++, but also links against libLLVM-15.so. If libLLVM-15.so is compiled against the new libc++ version, the ABI mismatch results in segfaults or even stack overflows. Note: we can only re-enable the std::pair trivial copy constructors again when the official libc++ ABI version is bumped to 2. PR: 276104 MFC after: 1 month (cherry picked from commit ce4f1f49e036fd806b534decfe38020dae32a384) contrib/llvm-project/libcxx/include/__config | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --=20 You are receiving this mail because: You are on the CC list for the bug.=
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