compiling in C mode and the compilation buffer

[Shug Boabie]

hi there,

i like to compile my code from within Emacs as i have a Makefile setup.
however, upon compiling; even on a successful compile the compilation
buffer needs to be closed afterward.

i was wondering; is there a way to have the compilation buffer close
automatically if there are no warnings or errors?

also, is there a way to run the compile command, without having to agree
that `make -k` is the correct command each time? that extra 'enter' is just
annoying.