https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64271
--- Comment #16 from Jonathan Wakely <redi at gcc dot gnu.org> --- Those patches actually were sent to the list, and I reviewed them, and got no reply: https://gcc.gnu.org/ml/libstdc++/2014-12/msg00069.html I've committed them (after suitable updates) so the libstdc++ parts of this should be finished now. libcilkrts was dropped from GCC mainline. Is the libgfortran/configure patch still relevant and needed?