K 10
svn:author
V 6
brooks
K 8
svn:date
V 27
2017-04-08T00:13:58.232503Z
K 7
svn:log
V 443
Add experimental xtoolchain ports for llvm-devel and llvm40.

With an appropriate port installed, in principle you can build a cross
world and/or kernel without a bootstrap compiler or binutils with:

make CROSS_TOOLCHAIN=llvm40 TARGET=arm64 buildworld buildkernel

In practice, this only has a chance of working on platforms with solid
LLD support.  At the moment I've had some success with i386, amd64, and
arm64.

Sponsored by:	DARPA, AFRL

END