https://blogs.gentoo.org/ago/2020/07/04/gentoo-tinderbox/ Issue: media-libs/mesa-22.1.7 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 800007 [details] build.log build log and emerge --info
Created attachment 800009 [details] 1-meson-log.txt 1-meson-log.txt
Error(s) that match a know pattern in addition to what has been reported in the summary: ../mesa-22.1.7/meson.build:1530:2: ERROR: Dependency "libzstd" not found, tried pkgconfig and cmake Library ws2_32 found: NO Run-time dependency libomxil-bellagio found: NO (tried pkgconfig and cmake) Run-time dependency libtizonia found: NO (tried pkgconfig and cmake) Run-time dependency libtizplatform found: NO (tried pkgconfig and cmake) Run-time dependency libzstd found: NO (tried pkgconfig and cmake) Run-time dependency tizilheaders found: NO (tried pkgconfig and cmake)
No idea how this is possible. Definitely doesn't seem to be related to LTO. pkgconfig is just failing to detect libzstd. build.log shows > app-arch/zstd-1.5.2-r1:0/1 -abi_mips_n32 -abi_mips_n64 -abi_mips_o32 -abi_s390_32 -abi_s390_64 -abi_x86_32 abi_x86_64 -abi_x86_x32 -lz4 split-usr -static-libs threads That is, zstd is built without abi_x86_32 enabled. The zstd dep in mesa's ebuild is > zstd? ( app-arch/zstd:=[${MULTILIB_USEDEP}] ) so I think something's wrong on your system?
