C i686-w64-mingw32-gcc hello.c -o hello32.exe # 32-bit x86_64-w64-mingw32-gcc hello.c -o hello64.exe # 64-bit C++ i686-w64-mingw32-g++ hello.cc -o hello32.exe # 32-bit x86_64-w64-mingw32-g++ hello.cc -o hello64.exe # 64-bit