GCC 11.1 Release Candidate available from gcc.gnu.org

[Jakub Jelinek]

On Thu, Apr 22, 2021 at 01:27:40PM +0100, Jonathan Wakely wrote:
> I'm just finishing testing this on various targets and will push to
> trunk. I'd like to backport it to gcc-11 too, to fix PR100179.

Ok for 11.1.

> commit 50070d8602a07160cece5890899929e9f210244d
> Author: Jonathan Wakely <jwakely@redhat.com>
> Date:   Thu Apr 22 11:10:06 2021
> 
>     libstdc++: Remove #error from <semaphore> implementation [PR 100179]
>     
>     This removes the #error from <bits/semaphore_base.h> for the case where
>     neither __atomic_semaphore nor __platform_semaphore is defined.
>     
>     Also rename the _GLIBCXX_REQUIRE_POSIX_SEMAPHORE macro to
>     _GLIBCXX_USE_POSIX_SEMAPHORE for consistency with the similar
>     _GLIBCXX_USE_CXX11_ABI macro that can be used to request an alternative
>     (ABI-changing) implementation.
>     
>     libstdc++-v3/ChangeLog:
>     
>             PR libstdc++/100179
>             * include/bits/semaphore_base.h: Remove #error.
>             * include/std/semaphore: Do not define anything unless one of
>             the implementations is available.

	Jakub