A C compiler that supports the latest spec would be nice as long as it doesn't sacrifice compile times. I like how quickly the system can recompile itself. Maybe extend pcc to include new features?

I'll admit to never having paid much attention to the changing specification for C. By latest spec you're referring to C11? I recall a coworker pointing me at http://www.tinycc.org/ awhile ago, and looking at the page today it says it mostly implements the previous C99 specification

It claims to be small, mostly compliant to C99 ("Currently missing items are: complex and imaginary numbers and variable length arrays."), and fast. But it isn't under development by the original author any more.

Jim