[Bug libstdc++/114891] Unconditional use of std::is_pointer_interconvertible_base_of_v in makes the header unusable with Clang 18

[cvs-commit at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114891

--- Comment #3 from GCC Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Jonathan Wakely <r...@gcc.gnu.org>:

https://gcc.gnu.org/g:1fbe1a50d86df11f434351cf62461a32747f9710

commit r15-92-g1fbe1a50d86df11f434351cf62461a32747f9710
Author: Jonathan Wakely <jwak...@redhat.com>
Date:   Tue Apr 30 09:48:00 2024 +0100

    libstdc++: Guard uses of is_pointer_interconvertible_v [PR114891]

    This type trait isn't supported by Clang 18. It's only used in static
    assertions, so they can just be omitted if the trait isn't available.

    libstdc++-v3/ChangeLog:

            PR libstdc++/114891
            * include/std/generator: Check feature test macro before using
            is_pointer_interconvertible_v.