https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86057
--- Comment #2 from Steve Kargl <sgk at troutmask dot apl.washington.edu> --- On Tue, Jun 05, 2018 at 05:25:12PM +0000, ro at gcc dot gnu.org wrote: > > --- Comment #1 from Rainer Orth <ro at gcc dot gnu.org> --- > Affects Solaris, too (and almost certainly macOS as well). > mempcpy seems to be a glibc 2.1 extension. I suspect bootstrap is broken on all non-glibc based systems.