https://blogs.gentoo.org/ago/2020/07/04/gentoo-tinderbox/ Issue: app-misc/g15composer-3.4 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
Created attachment 788225 [details] build.log build log and emerge --info
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
The bug has been closed via the following commit(s): https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=6ddd819630bccc08ae27bbe70091461a523f64c4 commit 6ddd819630bccc08ae27bbe70091461a523f64c4 Author: Florian Schmaus <flow@gentoo.org> AuthorDate: 2024-12-31 10:11:11 +0000 Commit: Florian Schmaus <flow@gentoo.org> CommitDate: 2024-12-31 10:26:48 +0000 app-misc/g15composer: treeclean Closes: https://bugs.gentoo.org/854729 (pkgremoved) Closes: https://bugs.gentoo.org/882657 (pkgremoved) Closes: https://bugs.gentoo.org/941540 (pkgremoved) Signed-off-by: Florian Schmaus <flow@gentoo.org> app-misc/g15composer/Manifest | 2 - .../g15composer/files/g15composer-3.2-docdir.patch | 11 ----- .../files/g15composer-3.2-freetype_pkgconfig.patch | 44 ------------------ app-misc/g15composer/files/g15composer-3.2.confd | 17 ------- app-misc/g15composer/files/g15composer-3.2.initd | 48 -------------------- app-misc/g15composer/g15composer-3.2-r1.ebuild | 52 ---------------------- app-misc/g15composer/g15composer-3.4.ebuild | 49 -------------------- app-misc/g15composer/g15composer-9999.ebuild | 49 -------------------- app-misc/g15composer/metadata.xml | 8 ---- profiles/package.mask | 1 - 10 files changed, 281 deletions(-)
