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From: "cvs-commit at gcc dot gnu.org" <sourceware-bugzilla@sourceware.org>
To: glibc-bugs@sourceware.org
Subject: [Bug build/31429] Glibc failed to build with -march=x86-64-v3
Date: Wed, 28 Feb 2024 19:50:19 +0000
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https://sourceware.org/bugzilla/show_bug.cgi?id=3D31429

--- Comment #1 from Sourceware Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by H.J. Lu <hjl@sourceware.org>:

https://sourceware.org/git/gitweb.cgi?p=3Dglibc.git;h=3Dbefe2d3c4dec8be2cdd=
01a47132e47bdb7020922

commit befe2d3c4dec8be2cdd01a47132e47bdb7020922
Author: H.J. Lu <hjl.tools@gmail.com>
Date:   Wed Feb 28 09:51:14 2024 -0800

    x86-64: Don't use SSE resolvers for ISA level 3 or above

    When glibc is built with ISA level 3 or above enabled, SSE resolvers
    aren't available and glibc fails to build:

    ld: .../elf/librtld.os: in function `init_cpu_features':
    .../elf/../sysdeps/x86/cpu-features.c:1200:(.text+0x1445f): undefined
reference to `_dl_runtime_resolve_fxsave'
    ld: .../elf/librtld.os: relocation R_X86_64_PC32 against undefined hidd=
en
symbol `_dl_runtime_resolve_fxsave' can not be used when making a shared ob=
ject
    /usr/local/bin/ld: final link failed: bad value

    For ISA level 3 or above, don't use _dl_runtime_resolve_fxsave nor
    _dl_tlsdesc_dynamic_fxsave.

    This fixes BZ #31429.
    Reviewed-by: Noah Goldstein <goldstein.w.n@gmail.com>

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