https://blogs.gentoo.org/ago/2020/07/04/gentoo-tinderbox/ Issue: sys-libs/libfaketime-0.9.9 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 798154 [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: /var/tmp/portage/sys-libs/libfaketime-0.9.9/temp/cc58yzlx.s: Error: invalid attempt to declare external version name as default in symbol `timer_gettime@@GLIBC_2.3.3' /var/tmp/portage/sys-libs/libfaketime-0.9.9/temp/ccKWnhph.s: Error: invalid attempt to declare external version name as default in symbol `timer_gettime@@GLIBC_2.3.3' lto-wrapper: fatal error: x86_64-pc-linux-gnu-gcc returned 1 exit status
Same with 0.9.10.
The bug has been closed via the following commit(s): https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=e63ba531b8c0ea14d4e15b3dc40c6ab790b8ad22 commit e63ba531b8c0ea14d4e15b3dc40c6ab790b8ad22 Author: Sam James <sam@gentoo.org> AuthorDate: 2022-08-25 03:50:17 +0000 Commit: Sam James <sam@gentoo.org> CommitDate: 2022-08-25 03:50:17 +0000 sys-libs/libfaketime: filter LTO It's a delicate package anyway. Closes: https://bugs.gentoo.org/863911 Signed-off-by: Sam James <sam@gentoo.org> sys-libs/libfaketime/libfaketime-0.9.10.ebuild | 3 +++ 1 file changed, 3 insertions(+)
*** Bug 893964 has been marked as a duplicate of this bug. ***
