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From: Manuel Lauss <manuel.lauss@gmail.com>
Date: Wed, 27 Jan 2021 16:04:53 +0100
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Subject: How to set x86 ISA needed property?
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I've been building a userland for an AMD E-450 (gcc march=btver1) on
a much more modern and faster x86 host.
Now, the machione does not boot because up-to-date  glibc devel says this:

/lib64/libc.so.6: CPU ISA level is lower than required

readelf libc.so.6 says:
Displaying notes found in: .note.gnu.property
 Owner                Data size        Description
 GNU                  0x00000010       NT_GNU_PROPERTY_TYPE_0
     Properties: x86 ISA needed: x86-64-baseline, x86-64-v2, x86-64-v3

x86-64-v3 is supported by the build machine, but the btver1 is at most -v2.
This used to work in the past; is there a way to force glibc to a certain level?
(binutils-2.35.1, gcc-10.2.1, glibc master as of 27.01.2021).


Thanks!
      Manuel