https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90330
--- Comment #20 from Iain Sandoe <iains at gcc dot gnu.org> --- (In reply to Iain Sandoe from comment #19) > (In reply to Matt Thompson from comment #17) > > > Now, I'm not sure that gcc itself needs /usr/include, but many of the > > libraries and more I compile with gcc seem to assume it. And I've gotten to > > the point where I just couldn't figure out how to pass '-isysroot' down to > > code like f2py (gcc is called by f2py but f2py only passes down Fortran > > flags. And I just *cannot* get our CMake system to pass > > CFLAGS='-isysroot...' to the gcc call within f2py). Packages that assume /usr/include should "just work" with the sysrooted compiler without any extra magic (I build LLVM and its associated things with GCC and a sysroot all the time). cmake can take a CMAKE_OSX_SYSROOT=/path/to/sysroot if you need to be explicit. otherwise, I'd expect it to honour CMAKE_CFLAGS= and CMAKE_CXXFLAGS= (but...)
