I tried to build latest CVS using mingw and gmp Makefile is also not generated. I tried different variations of ./configure --enable-threads --enable-unicode --enable-slow-config --with-tcp --with-clx --with-system-gmp=no --prefix=/c/lisp/app/ecl but with no luck. Is mingw port still supported, or we have to switch to MSVC? Thanks, Marko