GCC is way too big to fit on a PDP11. But it makes a fine cross-compiler. In fact, it can cross-compile for lots of smaller things, like AVR single chip microcontrollers (things that cost only a dollar or two). paul On Oct 23, 2010, at 10:47 AM, Pontus Pihlgren wrote: On Fri, Oct 22, 2010 at 08:45:53PM -0400, Paul Koning wrote: Does anyone here use gcc for the pdp11? No, but I'm curious. Do you mean to run in on a PDP-11 or would you use it to cross compile stuff?. /P