https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88750
--- Comment #2 from Jürgen Reuter <juergen.reuter at desy dot de> --- The tests worked till yesterday, but only today major parts of gcc recompiled because all files in gcc got a new timstamp. I am now trying to recompile also gmp, mpfr and mpc with the llvm-clang from XCode 10.1 (which is from November apparently). But my update to Mojave was before the compilation of gmp, mpfr, and mpc (which happened end of September).