https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98910
--- Comment #3 from ro at CeBiTec dot Uni-Bielefeld.DE <ro at CeBiTec dot Uni-Bielefeld.DE> --- On top of the missing locale_t definition, the other issue I'd reported is also still present: /vol/gcc/src/hg/master/local/libphobos/libdruntime/core/thread/osthread.d:1468:12: error: alias core.thread.osthread.idtype_t conflicts with alias core.thread.osthread.idtype_t at /vol/gcc/src/hg/master/local/libphobos/libdruntime/core/thread/osthread.d:162:12 1468 | import core.sys.posix.sys.wait : idtype_t; | ^