On 2021-04-20 17:23, Thomas Rodgers wrote:
On 2021-04-20 17:09, David Edelsohn wrote:
On Tue, Apr 20, 2021 at 7:52 PM Thomas Rodgers
<rodg...@appliantology.com> wrote:
On 2021-04-20 15:25, David Edelsohn via Gcc wrote:
On Tue, Apr 20, 2021 at 12:43 PM Jakub Jelinek via Gcc
<gcc@gcc.gnu.org> wrote:
The first release candidate for GCC 11.1 is available from
https://gcc.gnu.org/pub/gcc/snapshots/11.1.0-RC-20210420/
ftp://gcc.gnu.org/pub/gcc/snapshots/11.1.0-RC-20210420
and shortly its mirrors. It has been generated from git revision
r11-8265-g246abba01f302eb453475b650ba839ec905be76d.
I have so far bootstrapped and tested the release candidate on
x86_64-linux and i686-linux. Please test it and report any issues to
bugzilla.
If all goes well, I'd like to release 11.1 on Tuesday, April 27th.
As I have reported in Bugzilla, the last minute
libstdc++: Refactor/cleanup of C++20 atomic wait implementation
has severely regressed libstdc++ on AIX due to changes to
bits/semaphore_base.h header.
- David
I posted a patch to BZ that should disable <semaphore> entirely for AIX
(and other targets where there's not a supported implementation
strategy).
This patch isn't the best way of addressing this for a variety of
reasons, but this support is intended as experimental for GCC11 anyway.
Unfortunately I can't test it on AIX because it would seem that my ssh
keys never landed on the AIX cfarm machines.
I am testing the patch on an AIX system inside IBM.
But it seems that you are disabling semaphore entirely on AIX, which
is an unnecessary regression. AIX has POSIX semaphores. libstdc++
configure defines
_GLIBCXX_HAVE_POSIX_SEMAPHORE
I don't understand your comments about disabling semaphore on AIX
while the comment about experimental for GCC11 implies that this is
some new, experimental feature. I could understand disabling the
experimental feature, but not disabling all semaphore support.
Thanks, David
The #error would not be hit if _GLIBCXX_HAVE_POSIX_SEMAPHORE were
defined, but it shows up in your error report.
Specifically -
/tmp/GCC/powerpc-ibm-aix7.2.3.0/libstdc++-v3/include/bits/semaphore_base.h:259:
error: #error "No suitable semaphore implementation available"
