How was the FreeBASIC Xbox port made?
FreeBASIC for Xbox is possible because of the efforts of Open Source developers who created OpenXDK, the legal software development kit for Xbox. OpenXDK is created for a unixish environment, which is quite compatible with the FreeBASIC source. The port was created by forcing the FreeBASIC runtime library to use the OpenXDK version of Glibc instead of the mingw32 version. When compiled with the correct flags, this creates what looks like a standard EXE file. CXBE then strips the Windows PE header on this executable file and replaces it with an Xbox header. In effect, all the port really does is change the runtime library and link in a certain way to allow the CXBE utility to create an Xbox executable.
