| Summary: | dev-lang/python-3.12.0_rc1_p1[lto,pgo]: ICE with clang 17 due to ffat-lto-objects | ||
|---|---|---|---|
| Product: | Gentoo Linux | Reporter: | Violet Purcell <vimproved> |
| Component: | Current packages | Assignee: | Python Gentoo Team <python> |
| Status: | RESOLVED FIXED | ||
| Severity: | normal | CC: | parona |
| Priority: | Normal | Keywords: | PullRequest |
| Version: | unspecified | ||
| Hardware: | All | ||
| OS: | Linux | ||
| See Also: | https://github.com/gentoo/gentoo/pull/32247 | ||
| Whiteboard: | |||
| Package list: | Runtime testing required: | --- | |
| Bug Depends on: | |||
| Bug Blocks: | 912821 | ||
| Attachments: | build.log | ||
I ran into a similar thing testing python-3.12 with GCC (Wasn't bug worthy like this error). Since sys-devel/autoconf-archive-2023.02.20 the --ffat workaround in gentoo is no longer required for users that run -flto but don't set USE=lto so can be dropped. I've only tested this with 3.12 and have no issues running it for a short amount of time, so can only recommend doing this moving forward rather than backporting. I was going to upstream the fix but after speaking with Sam it was made clear most distros will still require the workaround so removing the append line from the ebuild is the best way forward imo. Please report the ICE to LLVM as well and link it here. ping, 17 is imminent (In reply to Sam James from comment #3) > ping, 17 is imminent This was fixed by rc3 at least for me. Could others test? rc3 with lto and pgo builds fine with clang-17 for me. Safe to close by now? Yep, it was fixed a while ago. Closing. |
Created attachment 867581 [details] build.log clang 17 added support for -ffat-lto-objects, which the ebuild appends if it detects LTO. However, it seems that -ffat-lto-objects causes an ICE with pgo in this circumstance. Since ffat-lto-objects isn't necessary for python to compile with clang, it would probably be best to just condition append -ffat-lto-objects to !tc-is-clang. Steps to reproduce: - Use LLVM profile - Install sys-devel/clang-17.0.0_rc2 - Set the pgo and lto USE flags for dev-lang/python - emerge -av dev-lang/python:3.12