#983942 - gromacs: ftbfs with -march=x86-64-v3

Debian Bug report logs - #983942
gromacs: ftbfs with -march=x86-64-v3

Reported by: Matthias Klose <[email protected]>

Date: Wed, 3 Mar 2021 15:45:17 UTC

Severity: minor

Found in version gromacs/2020.5-4

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Date: Sat, 27 Nov 2021 17:00:39 -0800
From: Nicholas Breen <[email protected]>
To: Matthias Klose <[email protected]>, [email protected]
Subject: Re: [Debichem-devel] Bug#983942: gromacs: ftbfs with -march=x86-64-v3
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On Wed, Mar 03, 2021 at 03:39:09PM +0000, Matthias Klose wrote: > Package: src:gromacs > Version: 2020.5-4 > Severity: minor > User: [email protected] > Usertags: ftbfs-x86-64-v3 > > Starting with LLVM 12 and GCC 11 (and backported to gcc-10 for Debian), > GCC introduces optimizations for new micro-architecture levels from > the x86-64 psABI. Filing these bug reports for packages building with > the current level (x86-64), but not with x86-64-v3. Checking against the newest versions, this is still present -- but it's also avoidable; the failure only occurs because the build is elsewhere normally forced to nothing beyond SSE4.1 extensions, as part of the *upstream* build system, for maximum compatibility. Building with -march=x86-64-v3 and with autodetected best-available SIMD flags (DEB_BUILD_OPTIONS=cpuopt) passes all tests. If there's a future way to detect an x86-64-v3 build, I think the sensible fix here is to raise the baseline SIMD choice to match. -- Nicholas Breen [email protected]

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Debian Bug report logs - #983942 gromacs: ftbfs with -march=x86-64-v3

Debian Bug report logs - #983942
gromacs: ftbfs with -march=x86-64-v3