[Bug libstdc++/114103] FAIL: 29_atomics/atomic/lock_free_aliases.cc -std=gnu++20 (test for excess errors)

["dave.anglin at bell dot net" <gcc-bugzilla@gcc.gnu.org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114103

--- Comment #15 from dave.anglin at bell dot net ---
On 2024-03-01 5:42 p.m., redi at gcc dot gnu.org wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114103
>
> Jonathan Wakely <redi at gcc dot gnu.org> changed:
>
>             What    |Removed                     |Added
> ----------------------------------------------------------------------------
>    Attachment #57540|0                           |1
>          is obsolete|                            |
>
> --- Comment #14 from Jonathan Wakely <redi at gcc dot gnu.org> ---
> Created attachment 57591
>    --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=57591&action=edit
> Do not define lock-free atomic aliases if not fully lock-free
>
> Here's all of that as a single (slightly cleaned up) patch.
>
With this change, lock_free_aliases.cc fails test for excess errors:
Excess errors:
/home/dave/gnu/gcc/gcc/libstdc++-v3/testsuite/29_atomics/atomic/lock_free_aliases.cc:7:
error: #error "Feature test macro for lock-free type 
aliases is missing in <atomic>"
/home/dave/gnu/gcc/gcc/libstdc++-v3/testsuite/29_atomics/atomic/lock_free_aliases.cc:19:
error: 'atomic_signed_lock_free' is not a member of 'std'
/home/dave/gnu/gcc/gcc/libstdc++-v3/testsuite/29_atomics/atomic/lock_free_aliases.cc:19:
error: template argument 1 is invalid
/home/dave/gnu/gcc/gcc/libstdc++-v3/testsuite/29_atomics/atomic/lock_free_aliases.cc:20:
error: 'atomic_unsigned_lock_free' is not a member of 'std'
/home/dave/gnu/gcc/gcc/libstdc++-v3/testsuite/29_atomics/atomic/lock_free_aliases.cc:20:
error: template argument 1 is invalid
/home/dave/gnu/gcc/gcc/libstdc++-v3/testsuite/29_atomics/atomic/lock_free_aliases.cc:25:
error: 'atomic_signed_lock_free' is not a member of 'std'
/home/dave/gnu/gcc/gcc/libstdc++-v3/testsuite/29_atomics/atomic/lock_free_aliases.cc:25:
error: template argument 1 is invalid
/home/dave/gnu/gcc/gcc/libstdc++-v3/testsuite/29_atomics/atomic/lock_free_aliases.cc:26:
error: 'atomic_unsigned_lock_free' is not a member of 'std'
/home/dave/gnu/gcc/gcc/libstdc++-v3/testsuite/29_atomics/atomic/lock_free_aliases.cc:26:
error: template argument 1 is invalid
/home/dave/gnu/gcc/gcc/libstdc++-v3/testsuite/29_atomics/atomic/lock_free_aliases.cc:29:
error: 'atomic_signed_lock_free' is not a member of 'std'
/home/dave/gnu/gcc/gcc/libstdc++-v3/testsuite/29_atomics/atomic/lock_free_aliases.cc:29:
error: template argument 1 is invalid
/home/dave/gnu/gcc/gcc/libstdc++-v3/testsuite/29_atomics/atomic/lock_free_aliases.cc:30:
error: 'atomic_unsigned_lock_free' is not a member of 'std'
/home/dave/gnu/gcc/gcc/libstdc++-v3/testsuite/29_atomics/atomic/lock_free_aliases.cc:30:
error: template argument 1 is invalid
/home/dave/gnu/gcc/gcc/libstdc++-v3/testsuite/29_atomics/atomic/lock_free_aliases.cc:33:
error: 'std::atomic_signed_lock_free' has not been declared
/home/dave/gnu/gcc/gcc/libstdc++-v3/testsuite/29_atomics/atomic/lock_free_aliases.cc:34:
error: 'std::atomic_unsigned_lock_free' has not been 
declared

This is with my posted cmath patch.