I now have a build for Linux.
Developed under Linux Mint but should run under Ubuntu. One motivation for a Linux build is the Valgrind tool, http://valgrind.org/. It has been possible in the past to run Valgrind in the simulator however recent changes by Apple have made this trickier and the OSX build of Valgrind has been broken on Mountain Lion since September 2012. I was running Linux Mint 64-bit which threw up some interesting casting and unsigned issues, fixed. I’m going to keep testing on Linux to help improve our stability.