https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83077
--- Comment #12 from Iain Sandoe <iains at gcc dot gnu.org> --- (In reply to Iain Sandoe from comment #11) > (In reply to François Dumont from comment #10) > > This is because you are facing the PR65762 issue. I just attached a path > > proposal to it that you need to apply too to be able to run your test. > > You'll be even able to simply use --disable-libstdcxx-dual-abi cause I made > > cxx11 abi the default in this case. > > Yes, with the second patch applied, that works for me also. > > Does gnu-versioned-namespace work for you with these two patches applied? > (I have a patch to enable versioned namespace on Darwin, which is very > similar to the GNU one, but it no longer builds).. FAOD, by which I mean "--enable-symvers=gnu-versioned-namespace" with no other configure options (which AFAICT disables dual ABI and enables the new one) ... I have more-or-less copied the gnu case for Darwin, but perhaps missed some case?