https://blogs.gentoo.org/ago/2020/07/04/gentoo-tinderbox/ Issue: sci-libs/openblas-0.3.20 fails to compile (lto). Discovered on: amd64 (internal ref: lto_tinderbox) NOTE: This machine uses lto with CFLAGS=-flto -Werror=odr -Werror=lto-type-mismatch -Werror=strict-aliasing Here is a bit of explanation: -Werror=lto-type-mismatch: User to find possible runtime issues in packages. It likely means the package is unsafe to build & use with LTO. For projects using the same identifier but with different types across different files, they must be fixed to be consistent across the codebase. -Werror=odr: Used to find possible runtime issues in packages. These bugs are a problem anyway but may be even worse when combined with LTO. C++ code must comply with the One Definition Rule (ODR) - see https://en.cppreference.com/w/cpp/language/definition#One_Definition_Rule. -Werror=strict-aliasing: Used to find possible runtime issues in packages. These bugs are a problem anyway but may be even worse when combined with LTO. Workarounds: - If upstream is friendly and still active, file a bug upstream. For emulators, codecs, games, or multimedia packages, it may be worth just applying a workaround instead, as upstreams sometimes aren't receptive to these bugs (VALID FOR ALL). - Use the new 'filter-lto' from flag-o-matic.eclass as it's likely to be unsafe with LTO (VALID FOR lto-type-mismatch - odr). - Fix it yourself if interested, of course (VALID FOR ALL). - Append-flags -fno-strict-aliasing (VALID FOR strict-aliasing). - Use memcpy() but a union is sometimes suitable too (VALID FOR strict-aliasing). - -fstrict-aliasing is implied by -O2, so this must be addressed in some form (VALID FOR strict-aliasing). See also: https://marc.info/?l=gentoo-dev&m=165639574126280&w=2
Created attachment 796756 [details] build.log.xz build log and emerge --info (compressed because it exceeds attachment limit, use 'xzless' to read it)
The bug has been closed via the following commit(s): https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=044b72e595e46ae602b22fc542b93008ec7ebad8 commit 044b72e595e46ae602b22fc542b93008ec7ebad8 Author: Michael Orlitzky <mjo@gentoo.org> AuthorDate: 2023-07-07 00:03:49 +0000 Commit: Michael Orlitzky <mjo@gentoo.org> CommitDate: 2023-07-07 00:28:46 +0000 sci-libs/openblas: add 0.3.23 All this really needed was a rebase of the shared-lib patch. The loong arch patch still applies, albeit with fuzz. The strict-aliasing warnings from bug 862909 also seem gone, probably as part of the underlying lapack upgrade. Closes: https://bugs.gentoo.org/862909 Closes: https://bugs.gentoo.org/905277 Signed-off-by: Michael Orlitzky <mjo@gentoo.org> sci-libs/openblas/Manifest | 1 + .../files/openblas-0.3.23-shared-blas-lapack.patch | 40 +++++ sci-libs/openblas/openblas-0.3.23.ebuild | 196 +++++++++++++++++++++ 3 files changed, 237 insertions(+)