David Cleaver <wraithx at morpheus.net> writes: $ make tuneup gcc -O2 -pedantic -m64 -std=gnu99 -mtune=k8 -march=k8 tuneup.c -o tuneup This is very wrong. There should be many steps in creating the tuneup executable, with -I options passed for each compilation. Some Windoze developer need to look into this. -- Torbjörn