Completely broken on all powerpc platforms with USE=lto. Tons of errors all over the place. --> /rust/deps/proc-macro2/build.rs:51:30 | 51 | let semver_exempt = cfg!(procmacro2_semver_exempt) || docs_rs; | ^^^^^^^^^^^^^^^^^^^^^^^^ | = help: expected names are: `bootstrap`, `debug_assertions`, `doc`, `doctest`, `feature`, `miri`, `overflow_checks`, `panic`, `proc_macro`, `relocation_model`, `sanitize`, `target_abi`, `target_arch`, `target_endian`, `target_env`, `target_family`, `target_feature`, `target_has_atomic`, `target_has_atomic_equal_alignment`, `target_has_atomic_load_store`, `target_os`, `target_pointer_width`, `target_thread_local`, `target_vendor`, `test`, `unix`, `windows` = note: `#[warn(unexpected_cfgs)]` on by default error[E0080]: evaluation of constant value failed --> /rust/deps/proc-macro2/build.rs:97:30 | 97 | if pieces.next() != Some("rustc 1") { | ^^^^^^^^^ using uninitialized data, but this operation requires initialized memory note: erroneous constant encountered --> /rust/deps/proc-macro2/build.rs:97:25 | 97 | if pieces.next() != Some("rustc 1") { | ^^^^^^^^^^^^^^^ For more information about this error, try `rustc --explain E0080`. Did not run successfully: exit status: 1 error[E0080]: it is undefined behavior to use this value --> /rust/deps/serde/build.rs:8:1 | 8 | fn main() { | ^^^^^^^^^ constructing invalid value at .<deref>: encountered uninitialized memory, but expected a reference | = note: The rules on what exactly is undefined behavior aren't clear, so this check might be overzealous. Please open an issue on the rustc repository if you believe it should not be considered undefined behavior. = note: the raw bytes of the constant (size: 8, align: 8) { ╾───────alloc8────────╼ │ ╾──────╼ } note: erroneous constant encountered --> /rust/deps/serde/build.rs:17:32 | 17 | let emscripten = target == "asmjs-unknown-emscripten" || target == "wasm32-unknown-emscripten"; | ^^^^^^^^^^^^^^^^^^^^^^^^^^ error[E0080]: it is undefined behavior to use this value --> /rust/deps/serde/build.rs:8:1 | 8 | fn main() { | ^^^^^^^^^ constructing invalid value at .<deref>: encountered uninitialized memory, but expected a reference | = note: The rules on what exactly is undefined behavior aren't clear, so this check might be overzealous. Please open an issue on the rustc repository if you believe it should not be considered undefined behavior. = note: the raw bytes of the constant (size: 8, align: 8) { ╾───────alloc48───────╼ │ ╾──────╼ } note: erroneous constant encountered --> /rust/deps/serde/build.rs:17:72 | 17 | let emscripten = target == "asmjs-unknown-emscripten" || target == "wasm32-unknown-emscripten"; | ^^^^^^^^^^^^^^^^^^^^^^^^^^^ error[E0080]: evaluation of constant value failed --> /rust/deps/serde/build.rs:86:30 | 86 | if pieces.next() != Some("rustc 1") { | ^^^^^^^^^ using uninitialized data, but this operation requires initialized memory note: erroneous constant encountered --> /rust/deps/serde/build.rs:86:25 | 86 | if pieces.next() != Some("rustc 1") { | ^^^^^^^^^^^^^^^ Did not run successfully: exit status: 1 Reproducible: Always
Created attachment 884824 [details] build.log and emerge --info
The bug has been referenced in the following commit(s): https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=aea8218e7503d79ec9e0f5e3c571322a8f7effe9 commit aea8218e7503d79ec9e0f5e3c571322a8f7effe9 Author: Anna (navi) Figueiredo Gomes <navi@vlhl.dev> AuthorDate: 2024-02-14 23:10:02 +0000 Commit: Sam James <sam@gentoo.org> CommitDate: 2024-02-15 13:52:42 +0000 profiles/arch/powerpc/package.use.mask: Mask lto in profiles/arch/powerpc/package.use.mask Bug: https://bugs.gentoo.org/924396 Signed-off-by: Anna (navi) Figueiredo Gomes <navi@vlhl.dev> Closes: https://github.com/gentoo/gentoo/pull/35334 Signed-off-by: Sam James <sam@gentoo.org> profiles/arch/powerpc/package.use.mask | 4 ++++ 1 file changed, 4 insertions(+)
This affects 1.76.0 as well, please extend mask.
Actually, only seems to affect ppc64le for 1.76.0.
I'm just going to mask it in arch/base and unmask it on amd64. It's way too brittle.
(In reply to Sam James from comment #5) > I'm just going to mask it in arch/base and unmask it on amd64. It's way too > brittle. Eh, or maybe not, given it'll be a pain to undo then. I will think about it.
The bug has been referenced in the following commit(s): https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=c4fea4d54461547fd1af6fb60796b99778a3d694 commit c4fea4d54461547fd1af6fb60796b99778a3d694 Author: Sam James <sam@gentoo.org> AuthorDate: 2024-03-10 01:48:12 +0000 Commit: Sam James <sam@gentoo.org> CommitDate: 2024-03-10 01:48:12 +0000 profiles/arch: broaden the Rust LTO mask for arm64 & powerpc matoro reports 1.76.0 is still hosed. Bug: https://bugs.gentoo.org/924301 Bug: https://bugs.gentoo.org/924396 Signed-off-by: Sam James <sam@gentoo.org> profiles/arch/arm64/package.use.mask | 2 +- profiles/arch/powerpc/package.use.mask | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-)
