Summary: | media-libs/coin-4.0.0 fails to compile (lto): eval-minimum-tab.hpp:58:15: error: type union YYSTYPE violates the C++ One Definition Rule [-Werror=odr] | ||
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Product: | Gentoo Linux | Reporter: | Agostino Sarubbo <ago> |
Component: | Current packages | Assignee: | Maciej Mrozowski <reavertm> |
Status: | RESOLVED FIXED | ||
Severity: | normal | CC: | eschwartz93 |
Priority: | Normal | ||
Version: | unspecified | ||
Hardware: | All | ||
OS: | Linux | ||
See Also: | https://github.com/coin3d/coin/issues/521 | ||
Whiteboard: | |||
Package list: | Runtime testing required: | --- | |
Bug Depends on: | |||
Bug Blocks: | 618550 | ||
Attachments: | build.log.xz |
Description
Agostino Sarubbo
2022-07-21 19:56:57 UTC
Created attachment 792923 [details]
build.log.xz
build log and emerge --info (compressed because it exceeds attachment limit, use 'xzless' to read it)
Error(s) that match a know pattern in addition to what has been reported in the summary: FAILED: lib/libCoin.so.4.0.0 /var/tmp/portage/media-libs/coin-4.0.0/work/coin/src/scxml/eval-minimum-tab.hpp:58:15: error: type ‘union YYSTYPE’ violates the C++ One Definition Rule [-Werror=odr] 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=5a63a911321a866495c7c3c893389c0430599e82 commit 5a63a911321a866495c7c3c893389c0430599e82 Author: Eli Schwartz <eschwartz93@gmail.com> AuthorDate: 2024-03-05 05:01:03 +0000 Commit: Sam James <sam@gentoo.org> CommitDate: 2024-03-05 05:08:29 +0000 media-libs/coin: mark as LTO-unsafe Closes: https://bugs.gentoo.org/859832 Signed-off-by: Eli Schwartz <eschwartz93@gmail.com> Signed-off-by: Sam James <sam@gentoo.org> media-libs/coin/coin-4.0.0.ebuild | 5 +++++ media-libs/coin/coin-4.0.1.ebuild | 5 +++++ media-libs/coin/coin-4.0.2.ebuild | 5 +++++ 3 files changed, 15 insertions(+) |