Hi
On Thu, Nov 26, 2020 at 3:57 PM Peter Maydell <peter.mayd...@linaro.org>
wrote:
> On Thu, 26 Nov 2020 at 11:29, <marcandre.lur...@redhat.com> wrote:
> >
> > From: Marc-André Lureau <marcandre.lur...@redhat.com>
> >
> > Since commit efc6c07 ("configure: Add a test for the minimum compiler
> > version"), QEMU explicitely depends on GCC >= 4.8.
> >
> > (clang >= 3.8 advertizes itself as GCC >= 4.2 compatible)
>
> All clangs always have advertised themselves as gcc-4.2-compatible,
> as far as I'm aware. 3.4 is the version we need to care about,
> I think it probably supported __builtin_expect(). (A test
> of the whole series with gcc 4.8 and clang 3.4 would confirm this.)
>
clang 3.4 also advertizes as gcc-4.2, thus we can safely remove that
__builtin_expect() fallback (if it didn't have it, it would have failed for
a long while)
I also checked the __builtin_expect() support with clang-3.4.2-9.el7.x86_64
from EPEL7 successfully.
--
Marc-André Lureau
