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From: "schnetter at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/100347] [11/12 Regression] GCC 11 does not recognize
 skylake; translates "march=native" to "x86_64"
Date: Thu, 06 May 2021 12:54:11 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D100347

--- Comment #13 from Erik Schnetter <schnetter at gmail dot com> ---
The failing GCC 11.1.0 is built by Apple Clang 12.0.5 via Spack. Looking at
debug output, I see that Spack inserts a "-march=3Dskylake" command line op=
tion.
(I was not aware of this before.) It does so by creating a compiler wrapper
(called "clang++" as well), which calls the actual compiler and adds this (=
and
some other) flags.=20

I seem to recall having read somewhere that GCC's CPU detection code must be
built without any "-march=3D..." flag.=