https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90330
--- Comment #16 from Iain Sandoe <iains at gcc dot gnu.org> --- Hi Matt, (In reply to Matt Thompson from comment #15) > I seem to still have issues. I downloaded 9.2.0 this morning and built it > with: > > $ ../gcc-9.2.0/configure > --prefix=/Users/mathomp4/installed/Core/gcc-gfortran/9.2.0 > --enable-languages=c,c++,fortran --disable-multilib > --with-native-system-header-dir=/usr/include > --with-sysroot=/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk |& tee > configure.log > $ make -j4 |& tee make.log > $ make install |& tee makeinstall.log a) --disable-multilib should no longer be needed [that PR was fixed on 9.2] b) (remind me) what is the "--with-native-system-header-dir=/usr/include" meant to provide? It seems like you are maybe mixing cross-configuration options with native ones... > I was hoping 9.2.0 would fix this. :( I am very happy to try and help you fix this - and to patch trunk / 9.3 if there's a bug - but right now the builds I've done (both with GCC as bootstrap - for Ada and with clang as bootstrap) have succeeded on Darwin9..Darwin18.