https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81797
Campbell <rlcamp.pdx at gmail dot com> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |rlcamp.pdx at gmail dot com --- Comment #21 from Campbell <rlcamp.pdx at gmail dot com> --- I can confirm that this affects the latest gcc-8 snapshot (20170715) on High Sierra with an APFS encrypted volume, and that adding ".NOTPARALLEL: allcreated install-headers install-freestanding-headers" to libstdc++-v3/include/Makefile.in resolves it.