https://blogs.gentoo.org/ago/2020/07/04/gentoo-tinderbox/ Issue: sys-libs/libbacktrace-1.0_p20220709 fails tests (LTO-SYSTEM). Discovered on: amd64 (internal ref: lto_tinderbox) NOTE: (LTO-SYSTEM) in the summary means that bug was found on a machine that runs lto but this bug MAY or MAY NOT BE related to lto. 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 829949 [details] build.log build log and emerge --info
Created attachment 829951 [details] 1-test-suite.log 1-test-suite.log
Error(s) that match a know pattern: FAIL: mtest_minidebug
Happens only with LTO.
The bug has been referenced in the following commit(s): https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=c99e8159e6cb8705227aab759359c158f52b64bd commit c99e8159e6cb8705227aab759359c158f52b64bd Author: Andreas K. Hüttel <dilfridge@gentoo.org> AuthorDate: 2023-05-28 20:52:24 +0000 Commit: Andreas K. Hüttel <dilfridge@gentoo.org> CommitDate: 2023-05-28 20:52:24 +0000 package.mask: Mask libbacktrace for removal Bug: https://bugs.gentoo.org/880573 Bug: https://bugs.gentoo.org/864157 Bug: https://bugs.gentoo.org/885471 Bug: https://bugs.gentoo.org/870454 Bug: https://bugs.gentoo.org/884571 Signed-off-by: Andreas K. Hüttel <dilfridge@gentoo.org> profiles/package.mask | 5 +++++ 1 file changed, 5 insertions(+)
The bug has been closed via the following commit(s): https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=d522b91a537fe515e82c67d214a5b60561c61415 commit d522b91a537fe515e82c67d214a5b60561c61415 Author: Jakov Smolić <jsmolic@gentoo.org> AuthorDate: 2023-07-08 17:17:00 +0000 Commit: Jakov Smolić <jsmolic@gentoo.org> CommitDate: 2023-07-08 17:39:46 +0000 sys-libs/libbacktrace: treeclean Closes: https://bugs.gentoo.org/870454 Closes: https://bugs.gentoo.org/884571 Closes: https://bugs.gentoo.org/880573 Closes: https://bugs.gentoo.org/885471 Signed-off-by: Jakov Smolić <jsmolic@gentoo.org> profiles/package.mask | 5 - sys-libs/libbacktrace/Manifest | 1 - .../libbacktrace-1.0_p20220709-teststatic.patch | 287 --------------------- .../libbacktrace/libbacktrace-1.0_p20220709.ebuild | 45 ---- sys-libs/libbacktrace/metadata.xml | 11 - 5 files changed, 349 deletions(-)
