bsdbuild

BSDBuild is a cross-platform build system. Derived from the traditional 4.4BSD make libraries, BSDBuild allows BSD-style Makefiles (without BSD make extensions), and works natively under most operating systems and make flavors. Since BSDBuild is implemented as a library (as opposed to a macro package), Makefiles are edited directly, as opposed to being compiled (however, if the build directory is separate from the source directory, BSDBuild will produce the required Makefiles in place).