Computing x86 ISA level at configure time

[H.J. Lu]

On Tue, Apr 23, 2024 at 12:01 PM Florian Weimer <fweimer@redhat.com> wrote:
>
> I'm trying to build glibc with these configure arguments:
>
>   CC="gcc -march=x86-64-v3" CXX="g++ -march=x86-64-v3" \
>   --with-rtld-early-cflags=-march=x86-64
>
> It does not quite work because the ld.so trampolines are now initialized
> early, and at that point, -march=x86-64 is in effect.  I tried to move
> the computation to the configure state, so that it is frozen using the
> default (not early) CC/CFLAGS combination.  I've got a prototype patch,
> but I've trouble understanding the meaning of “baseline” vs the other
> options.  Any suggestions how to proceed?
>

Can you open a glibc bug report, and CC Sunil and me?

Thanks.

-- 
H.J.