DTrace tests should be better citizens
This is the Joyent bugs:
OS-2581 dtest should specify -fPIC when building shared objects
OS-2583 dtest tests should explicitly build 32-bit libraries and executables
OS-2584 dtest tests should call gcc, not cc
The only part that isn't self-explanatory is that OS-2583 is a consistency issue, in the face of a 'gcc' which defaults to -m64 being found in $PATH.