** Help for users of the "mingw" compiler ** Abuild's mingw support is incomplete. At present, it is implemented using Cygwin's gcc or g++ with the -mno-cygwin option. There are a few known problems. Since abuild itself is a Windows application but make and gcc are both provided by Cygwin, absolute paths are not portable between the two systems. This means that abuild's mingw support will almost surely not work if there are any absolute paths in your build or if there are any build items that span drive letters. However, for simple builds, it will probably work fine and generate executables that don't depend on Cygwin at runtime. Because of the incomplete nature of mingw support, you must set the environment variable MINGW=1 in order for abuild to make the mingw compiler available as a platform choice.