[Bug bootstrap/95413] [11 regression] i686-linux --enable-targets=all cannot configure m64 libgomp

["jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95413

Jakub Jelinek <jakub at gcc dot gnu.org> changed:

           What    |Removed                     |Added
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                 CC|                            |jakub at gcc dot gnu.org

--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
(In reply to H.J. Lu from comment #1)
> > I strongly suspect the CET patches, but haven't yet figured out what's going
> > wrong.
> 
> How did CET changes add -march=i486 -mtune=i686? Can you bisect to the
> commit?

-march=i486 -mtune=i686 is something added by libgomp/configure.tgt:
    # Note that bare i386 is not included here.  We need cmpxchg.
    i[456]86-*-linux*)
        config_path="linux/x86 linux posix"
        case " ${CC} ${CFLAGS} " in
          *" -m64 "*|*" -mx32 "*)
            ;;
          *)
            if test -z "$with_arch"; then
              XCFLAGS="${XCFLAGS} -march=i486 -mtune=${target_cpu}"
            fi
        esac
        ;;
But that should enable it only when building the 32-bit libgomp and not 32-bit.
 So something else must be adding -m64 somewhere later.