I am attempting to build the gcj for Windows in a unix-esque shell Trying again with gcc-4.6.3. I have downloaded a program called mcpp, which is apparently a c preprocessor that works. ./contrib/download_prerequisites; works okay. ./configure; works okay. make; does not work okay: I am told that my C preprocessor /lib/cpp fails sanity check. How on earth am I supposed to get past this?