[Bug c++/114868] [modules] func declared in GMF and exported via using-decl in module partition is not actually exported

["cvs-commit at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114868

--- Comment #3 from GCC Commits <cvs-commit at gcc dot gnu.org> ---
The releases/gcc-14 branch has been updated by Nathaniel Shead
<nshead@gcc.gnu.org>:

https://gcc.gnu.org/g:782ad2033ea0709a25ef3e899cbb9491406146d5

commit r14-10241-g782ad2033ea0709a25ef3e899cbb9491406146d5
Author: Nathaniel Shead <nathanieloshead@gmail.com>
Date:   Tue Apr 9 21:49:58 2024 +1000

    c++: Propagate using decls from partitions [PR114868]

    The modules code currently neglects to set OVL_USING_P on the dependency
    created for a using-decl, which causes it not to remember that the
    OVL_EXPORT_P flag had been set on it when emitted from the primary
    interface unit. This patch ensures that it occurs.

            PR c++/114868

    gcc/cp/ChangeLog:

            * module.cc (depset::hash::add_binding_entity): Propagate
            OVL_USING_P for using-declarations.

    gcc/testsuite/ChangeLog:

            * g++.dg/modules/using-15_a.C: New test.
            * g++.dg/modules/using-15_b.C: New test.
            * g++.dg/modules/using-15_c.C: New test.

    Signed-off-by: Nathaniel Shead <nathanieloshead@gmail.com>
    (cherry picked from commit 0d0215b10dbbe39d655ceda4af283f288ec7680c)