[Bug target/120933] Turn on -mtls-dialect=gnu2 by default on x86-64

[cvs-commit at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=120933

--- Comment #6 from GCC Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Sam James <sja...@gcc.gnu.org>:

https://gcc.gnu.org/g:96a291c4bb0b8a00b0a125e6a60f60072ffe53a7

commit r16-3355-g96a291c4bb0b8a00b0a125e6a60f60072ffe53a7
Author: Sam James <s...@gentoo.org>
Date:   Sat Aug 23 00:54:01 2025 +0100

    i386: wire up --with-tls to control -mtls-dialect= default

    Allow passing --with-tls= at configure-time to control the default value
    of -mtls-dialect= for i386 and x86_64. The default itself (gnu) is not
changed
    unless --with-tls= is passed.

    --with-tls= is already wired up for ARM and RISC-V.

    gcc/ChangeLog:
            PR target/120933

            * config.gcc (supported_defaults): Add tls for i386, x86_64.
            * config/i386/i386.h (host_detect_local_cpu): Add tls.
            * doc/install.texi: Document --with-tls= for i386, x86_64.