https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81797
--- Comment #65 from Chris Johns <chrisj at rtems dot org> --- I am still seeing this issue with the patch https://gcc.gnu.org/ml/gcc-patches/2018-02/msg00933.html applied to gcc-7.3.0 (RTEMS 5 [master]) tool builds. This is on Mojave and an fully updated Xcode. The ARM tools built but the SPARC tools do not and it currently seem repeatable. This is on a 2.6GHz i7 with an internal 1T SSD.