Bug 710984 – <sys-devel/llvm-10 (used by sys-devel/clang) incompatible with >=sys-libs/glibc-2.31 (undefined reference to __*_finite)

• Product: Gentoo Linux
• Status: RESOLVED OBSOLETE

[Description Arfrever Frehtes Taifersar Arahesis 2020-02-27 18:46:51 UTC]

Change in glibc 2.31:
https://sourceware.org/git/?p=glibc.git;a=commit;h=7bdb921d70bf9f93948e2e311fef9ef439314e41

Clang bug:
https://bugs.llvm.org/show_bug.cgi?id=45034

Patch proposed for LLVM:
https://reviews.llvm.org/D74712

Example errors during linking:
undefined reference to `__log_finite'
undefined reference to `__log2_finite'
undefined reference to `__log10_finite'
undefined reference to `__exp_finite'
undefined reference to `__exp2_finite'
undefined reference to `__pow_finite'

[Comment 1 Arfrever Frehtes Taifersar Arahesis 2020-02-28 16:33:14 UTC]

Fix:
  "master" branch:
    https://reviews.llvm.org/rG6d15c4deab51498b70825fb6cefbbfe8f3d9bdcf
    https://github.com/llvm/llvm-project/commit/6d15c4deab51498b70825fb6cefbbfe8f3d9bdcf

  "release/10.x" branch:
    https://reviews.llvm.org/rGcd0926d087a85c5ee1222ca80980b4440214a822
    https://github.com/llvm/llvm-project/commit/cd0926d087a85c5ee1222ca80980b4440214a822

[Comment 2 Andreas K. Hüttel 2020-03-23 21:08:05 UTC]

OK we should probably wait for llvm-10 release before rekeywording glibc-2.31

[Comment 3 Andreas K. Hüttel 2020-04-23 10:04:35 UTC]

This is fixed in llvm-10, which is now in the tree

[Comment 4 Arfrever Frehtes Taifersar Arahesis 2020-04-23 21:46:36 UTC]

I think that LLVM maintainers wanted to backport fix to new revision of at least sys-devel/llvm 9.0.1 (and less likely 7.1.0 and 8.0.1).

[Comment 5 tt_1 2020-08-17 06:19:19 UTC]

How does this bug manifest itself? I was able to recompile llvm-9 with glibc-2.31-r6 today.

[Comment 6 tt_1 2020-08-17 06:41:07 UTC]

Created attachment 655054 [details, diff]
layman backport from llvm-10.x branch

I did a silly little backport myself. I can test it, but need to know how to reproduce first.