https://blogs.gentoo.org/ago/2020/07/04/gentoo-tinderbox/ Issue: media-gfx/graphite2-1.3.14_p20210810-r2 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 820402 [details] build.log build log and emerge --info
Error(s) that match a know pattern in addition to what has been reported in the summary: FAILED: tests/vm/vm-test-call FAILED: tests/vm/vm-test-direct /var/tmp/portage/media-gfx/graphite2-1.3.14_p20210810-r2/work/graphite-80c52493ef42e6fe605a69dcddd2a691cd8a1380/src/inc/Segment.h:78:7: error: type ‘struct Segment’ violates the C++ One Definition Rule [-Werror=odr]
lto_tinderbox has reproduced this issue with version 1.3.14_p20210810-r3 - Updating summary.
The bug has been closed via the following commit(s): https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=f199ce7fe94e1d86fe9b9de709cfd5fcba31f009 commit f199ce7fe94e1d86fe9b9de709cfd5fcba31f009 Author: Sam James <sam@gentoo.org> AuthorDate: 2024-03-14 00:29:55 +0000 Commit: Sam James <sam@gentoo.org> CommitDate: 2024-03-14 00:29:55 +0000 media-gfx/graphite2: filter LTO ODR violations. Also, previous attempts to upstream issues like e.g. linking with libstdc++ didn't go well. Closes: https://bugs.gentoo.org/875224 Signed-off-by: Sam James <sam@gentoo.org> media-gfx/graphite2/graphite2-1.3.14_p20210810-r3.ebuild | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-)
