Check out http://swtch.com/plan9port/ http://swtch.com/plan9port/, it's a huge project that runs on (to quote the site) Linux (x86, x86-64, PowerPC, and ARM), F

Check out http://swtch.com/plan9port/ http://swtch.com/plan9port/, it's a huge project that runs on (to quote the site) Linux (x86, x86-64, PowerPC, and ARM), FreeBSD (x86, x86-64), Mac OS X (x86 and Power PC), NetBSD (x86 and PowerPC), OpenBSD (x86 and PowerPC), SunOS (Sparc). It uses a shell script to do a little bit of config, then bootstraps mk (a Bell Labs successor to make) and builds everything from some very human-readable mkfiles. When you want to build, you just untar the source and run ./INSTALL