Software-build tool, replacement for make Perforce's Jam (formerly called Jam/MR) is a powerful and highly customizable utility to build programs and other things, that can run on Un*x, Nt, VMS, OS/2 and Macintosh MPW, using portable Jamfiles. It can build large projects spread across many directories in one pass, and can run jobs in parallel where make would not. It takes some time to fully apprehend, especially when one's already accustomed to make(1), but there's no comparison in power when comparing these two tools. Standard rules: - can automatically extract header dependencies for C/C++ (you can customize for you own language) - provide for automatic "clean", "install", "uninstall" rules, so that an automake-like tool is not needed