> No problem here x86_64-apple-darwin15 with a build using… True, I didn’t realize libgomp is built… but the Fortran module files are not installed in the right place.
$ ls /usr/local/gfortran/lib/**/libgomp.dylib /usr/local/gfortran/lib/i386/libgomp.dylib /usr/local/gfortran/lib/libgomp.dylib $ ls /usr/local/gfortran/lib/**/omp_lib.mod /usr/local/gfortran/lib/gcc/x86_64-apple-darwin15/6.1.0/finclude/omp_lib.mod It’s because the Makefile machinery is wrong. libgomp/Makefile.am has: fincludedir = $(libdir)/gcc/$(target_alias)/$(gcc_version)/finclude while the corresponding libgfortran has: fincludedir = $(libdir)/gcc/$(target_alias)/$(gcc_version)$(MULTISUBDIR)/finclude notice the extra $(MULTISUBDIR). So this is apparently not a new bug (https://gcc.gnu.org/bugzilla/show_bug.cgi?id=60670), but it probably should be fixed. FX