[RFC] external compiler support

[Simon J. Gerraty]

On Wed, 27 Feb 2013 11:37:05 -0700, Warner Losh writes:
>> CC?=3D      ${BUILD_TOOL_PREFIX}/${CROSS_TARGET_PREFIX}gcc
>>=20
>> since these aren't variables that anyone needs to manipulate regularly
>> a little verbosity doesn't hurt.
>
>That stray / will kill you :)

Sure, but we only ever use external toolchains.
The setup would of necessity be different in freebsd.
My point was a more verbose variable name would be a good idea.

Thanks
--sjg