Created attachment 916419 [details] rust-1.84.0 build log 1.84.0 fails to build, 1.83.0-r1 builds fine. = note: /usr/bin/x86_64-pc-linux-gnu-ld.bfd: /var/tmp/portage/dev-lang/rust-1.84.0/temp/rustco5smjh/librustc_codegen_llvm-66164a4ba99020e3.rlib: error adding symbols: file format not recognized clang-19: error: linker command failed with exit code 1 (use -v to see invocation) (...) ------------- error: could not compile `rustc_driver` (lib) due to 1 previous error
Created attachment 916420 [details] emerge info
ok, seems to be an lto+bfd issue. According to e.g. https://github.com/rust-lang/rust/issues/54971 this happens quite frequently. Using lld as in the referenced bug fixed the issue.
same problem today, build success after remore USE="lto"
(In reply to Zhixu Liu from comment #3) > same problem today, build success after remore USE="lto" updated: use profile default/linux/amd64/23.0/hardened CC=gcc CXX=g++ USE="lto" emerge -Ov1e =rust-1.84.1 success CC=clang CXX=clang++ USE="lto" emerge -Ov1e =rust-1.84.1 failed IIRC, I'm always use the later for emerge, never failed, seemes the failed start from 1.84.0
bfd can't work with Clang LTO (at least without using hacky plugin or maybe not at all). I'm surprised it ever worked.
(In reply to Sam James from comment #5) > bfd can't work with Clang LTO (at least without using hacky plugin or maybe > not at all). I'm surprised it ever worked. hmm, it works for me until 1.84, :( so we should handle this in ebuild too, i think?
I think the configuration is invalid... it'll definitely fail on other packages too.
For anyone trying this too and getting an error I managed to get it working with this use flags: +clippy +cpu_flags_x86_sse2 +doc +llvm_targets_NVPTX +lto +nightly +parallel-compiler +rust-analyzer +rust-src +rustfmt +system-llvm +verify-sig env: CFLAGS="-O2 -march=native -flto=thin" CXXFLAGS="${CFLAGS}" LDFLAGS="-fuse-ld=lld" CC="clang" CXX="clang++" LD="ld.lld" AR="llvm-ar" NM="llvm-nm" RANLIB="llvm-ranlib" RUSTFLAGS="-C opt-level=2 -C target-cpu=native -C embed-bitcode=yes -C linker=clang -C link-arg=-fuse-ld=lld"
*** Bug 950100 has been marked as a duplicate of this bug. ***
(In reply to Nuno Alexandre from comment #8) > RUSTFLAGS="-C opt-level=2 -C target-cpu=native -C embed-bitcode=yes -C > linker=clang -C link-arg=-fuse-ld=lld" Is lto actually enabled if -Clinker-plugin-lto is missing?
(In reply to rodolfo from comment #10) > (In reply to Nuno Alexandre from comment #8) > > RUSTFLAGS="-C opt-level=2 -C target-cpu=native -C embed-bitcode=yes -C > > linker=clang -C link-arg=-fuse-ld=lld" > > Is lto actually enabled if -Clinker-plugin-lto is missing? With USE="lto" yes
RUSTFLAGS="-C link-arg=-fuse-ld=lld" is enough, but the problem is "llvm-core/lld" is not in BDEPEND, so it still failed if lld is not emerged. I don't know howto add llvm-core/lld into BDEPEND, like bellow: > if use lto && tc-is-clang ; then > BDEPEND+="llvm-core/lld" > fi
Created attachment 920386 [details] build.log,xz
github PR updated, please have a test
(In reply to Zhixu Liu from comment #14) > github PR updated, please have a test Sorry for the late reply was busy. The update didn't help unfortunately
Created attachment 920696 [details] build.log.xz
(In reply to zyxhere from comment #16) > Created attachment 920696 [details] > build.log.xz please try another test, with following patch in src_configure, thanks - $(if use lto && tc-is-clang && ! tc-ld-is-lld; then + $(if use lto && tc-is-clang ; then
(In reply to Zhixu Liu from comment #17) > (In reply to zyxhere from comment #16) > > Created attachment 920696 [details] > > build.log.xz > > please try another test, with following patch in src_configure, thanks > > - $(if use lto && tc-is-clang && ! tc-ld-is-lld; then > + $(if use lto && tc-is-clang ; then It build now with your PR 😊
The bug has been closed via the following commit(s): https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=caea6d9760e3f9a67d6e9205ae6c176548b19927 commit caea6d9760e3f9a67d6e9205ae6c176548b19927 Author: Z. Liu <zhixu.liu@gmail.com> AuthorDate: 2025-02-26 15:18:52 +0000 Commit: Sam James <sam@gentoo.org> CommitDate: 2025-03-21 19:12:55 +0000 dev-lang/rust: fix build using clang but not lld use-lld appeared first in commit bfba6ef328bbba327cae8918e795c11b89217672 refactored in commit befd1eb4ec78e19f0c8628fa75241ea3ed6ec792 Closes: https://bugs.gentoo.org/948027 Signed-off-by: Z. Liu <zhixu.liu@gmail.com> Closes: https://github.com/gentoo/gentoo/pull/40772 Signed-off-by: Sam James <sam@gentoo.org> dev-lang/rust/rust-1.84.0-r1.ebuild | 8 ++++++++ dev-lang/rust/rust-1.84.1-r1.ebuild | 8 ++++++++ dev-lang/rust/rust-1.85.0-r1.ebuild | 8 ++++++++ dev-lang/rust/rust-1.85.0.ebuild | 8 ++++++++ dev-lang/rust/rust-1.85.1.ebuild | 8 ++++++++ dev-lang/rust/rust-1.86.0_beta20250218-r1.ebuild | 8 ++++++++ dev-lang/rust/rust-1.86.0_beta20250225.ebuild | 8 ++++++++ dev-lang/rust/rust-9999.ebuild | 8 ++++++++ 8 files changed, 64 insertions(+)
