llvm/clang is no longer in ports, nothing to do here.
clang is in base, use newer gdb, bitrig-gcc is no longer.
bitrig-gcc and bitrig-llvm are no more.

Clang is in base and lang/gcc/4.8 is used for all gcc required packages.
Force gmake to build without guile.
Switch aget to GCC4 module instead of using system gcc.
Switch astmanproxy to GCC4 module instead of using system gcc.
Switch avinfo to GCC4 module instead of using system gcc.
Use clang to generate depends files.

NOTE: this is still not ported to Bitrig.
Allow cntlm to build using clang
Allow colrdx to build with clang.
Allow figlet to build with clang.
Workaround ftpcopy to force use of clang compiler.
Use clang not gcc to build goggles.
make mozjs use gcc 4.8 properly
Use clang when building icebreaker
Use clang when building ipguard
Use clang when building isomaster
Use GCC4 to build lmbench, code isn't clang friendly.
Use clang when building mp3gain
Allow netris to build with clang