rustc hangs if gcc is removed

[Naddiseo]

I built rustc 0.7 from source the other day on Ubuntu 13.04 x64, presumably with gcc. Today I accidentally removed gcc, well installed the libgcc:i386 version instead, after which rustc would hang when invoked. I decided to rebuild the compiler with debugging enabled so I could get a backtrace, and configure informed me that I didn't have gcc installed. After installing gcc again, rustc worked.

I'm not sure if this can be addressed in rust, but it would be nice to notify the user if a required library is missing.

[catamorphism]

Can someone using Linux try reproducing this?

[thestinger]

I can reproduce this, but I'm closing all these in favour of #9081.

[catamorphism]

@thestinger Ah, great, I suspected that's what this was.