https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106851
--- Comment #5 from Nathaniel Shead <nshead at gcc dot gnu.org> ---
(In reply to Jonathan Wakely from comment #4)
> I tried doing it this way instead
>
> namespace std {
> export using std::vector;
> namespace pmr {
> export using std::vector;
> }
> }
>
> but that didn't work, nothing got exported. But maybe that will be fixed by
> Nathaniel's https://gcc.gnu.org/pipermail/gcc-patches/2024-March/647088.html
Yup, looks to be this issue. This is merged into trunk now and with a quick
test appears to work: https://godbolt.org/z/T5zPfPGro
