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Date: Thu, 26 Nov 2020 22:33:04 +0000
From: Jonathan Wakely <jwakely@redhat.com>
To: David Edelsohn <dje.gcc@gmail.com>
Cc: libstdc++ <libstdc++@gcc.gnu.org>
Subject: Re: More new AIX errors
Message-ID: <20201126223304.GN1312820@redhat.com>
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On 26/11/20 15:33 -0500, David Edelsohn via Libstdc++ wrote:
>Hi, Jonathan
>
>Thanks for the recent fixes.  I still see a few errors that have crept
>in on AIX.  All the same:
>
>FAIL: 17_intro/headers/c++2020/all_no_rtti.cc (test for excess errors)
>FAIL: 17_intro/headers/c++2020/all_pedantic_errors.cc (test for excess errors)
>FAIL: 17_intro/headers/c++2020/operator_names.cc (test for excess errors)
>FAIL: 17_intro/headers/c++2020/stdc++.cc (test for excess errors)
>FAIL: 17_intro/headers/c++2020/stdc++_multiple_inclusion.cc (test for
>excess errors)
>
>/tmp/GCC/powerpc-ibm-aix7.2.3.0/libstdc++-v3/include/latch:64: error:
>'notify_all' is not a member of 'std::__atomic_impl'
>/tmp/GCC/powerpc-ibm-aix7.2.3.0/libstdc++-v3/include/latch:75: error:
>'__atomic_wait' is not a member of 'std'; did you mean
>'__atomic_val_t'?
>
>Can you take a look when you have a moment?

I think that was caused by r11-5436 which added <latch> to the
precompiled header <bits/stdc++.h>, and <latch> incorrectly assumes
that the atomic waiting functions are always available. They're not
available for the gthr-single.h multilib on AIX.

I'm testing the fix now.