[Bug libstdc++/98725] Review what is disabled in libstdc++ by --disable-wchar_t

[cvs-commit at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98725

--- Comment #10 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Jonathan Wakely <redi@gcc.gnu.org>:

https://gcc.gnu.org/g:4bdb9d618d30fc33d7eaab374baf377fa4e9d955

commit r12-4265-g4bdb9d618d30fc33d7eaab374baf377fa4e9d955
Author: Jonathan Wakely <jwakely@redhat.com>
Date:   Fri Oct 8 14:52:07 2021 +0100

    libstdc++: Enable type traits for wchar_t unconditionally [PR98725]

    None of these traits depend on libc support for wchar_t, so they should
    be defined unconditionally. The wchar_t type is always defined in C++.

    libstdc++-v3/ChangeLog:

            PR libstdc++/98725
            * include/c_global/cstddef [!_GLIBCXX_USE_WCHAR_T]
            (__byte_operand<wchar_t>): Define specialization.
            * include/std/type_traits (__make_signed<wchar_t>)
            (__make_unsigned<wchar_t>): Remove redundant check for
            __WCHAR_TYPE__ being defined.
            * include/tr1/type_traits [!_GLIBCXX_USE_WCHAR_T]
            (__is_integral_helper<wchar_t>): Likewise.