[Bug c++/120195] [modules] export using of purview 'extern "C++"' declaration not bound in importers

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=120195

--- Comment #1 from GCC Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Nathaniel Shead <nsh...@gcc.gnu.org>:

https://gcc.gnu.org/g:f0c761165929cded4ae08fd5151b483f786bb1b0

commit r16-3274-gf0c761165929cded4ae08fd5151b483f786bb1b0
Author: Nathaniel Shead <nathanielosh...@gmail.com>
Date:   Sun Aug 17 13:00:15 2025 +1000

    c++/modules: Fix exporting using-decls of unattached purview functions
[PR120195]

    We have logic to adjust a function decl if it gets re-declared as a
    using-decl with different purviewness, but we also need to do the same
    if it gets redeclared with different exportedness.

            PR c++/120195

    gcc/cp/ChangeLog:

            * name-lookup.cc (do_nonmember_using_decl): Also handle change
            in exportedness of a function.

    gcc/testsuite/ChangeLog:

            * g++.dg/modules/using-32_a.C: New test.
            * g++.dg/modules/using-32_b.C: New test.

    Signed-off-by: Nathaniel Shead <nathanielosh...@gmail.com>