https://gcc.gnu.org/bugzilla/show_bug.cgi?id=4225
sandra at gcc dot gnu.org changed: What |Removed |Added ---------------------------------------------------------------------------- Status|NEW |RESOLVED CC| |sandra at gcc dot gnu.org Resolution|--- |FIXED --- Comment #6 from sandra at gcc dot gnu.org --- Fixed on trunk. RS/6000 AIX is the only remaining target that still gives system headers this special treatment. See https://gcc.gnu.org/ml/gcc-patches/2018-07/msg00116.html