https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61315
--- Comment #6 from Jack Howarth <howarth at nitro dot med.uc.edu> --- I would also add that you are playing with fire here. Currently no company has a motivation to expend money or resources for fortran development on llvm as long as FSF gcc is buildable. If you start removing competing compilers from bootstrapping FSF gcc, it is much more likely that someone will fund such a llvm-based fortran compiler project. You may get some short-term satisfaction from walling off FSF-gcc from clang, the long-term outcome for the FSF gcc project might not be so happy.