It is possible to compile native Windows FreeSG libraries using Cygwin. If the FreeSG configuration script detects a Cygwin environment, it will automatically include the -mno-cygwin compiler flag, such that the resulting libraries do not depend on the Cygwin library.

1. FreeSG depends on the Agar library. Follow the steps described in the Agar installation guide.
2. At this point, you should be ready to compile and install FreeSG:

     $ tar -xzf freesg-*.tar.gz
     $ cd freesg-*
     $ ./configure && make && make install
   

3. Various demos are available from the ./demos directory and can be compiled in the same way.