Before doing a build, this change requires:
cd /usr/src/share/mk && make install
> CVSROOT: /cvs
> Module name: src
> Changes by: [email protected] 2017/04/17 09:53:21
>
> Modified files:
> gnu/lib : Makefile
> gnu/usr.bin : Makefile
> gnu/usr.bin/clang: Makefile.inc
> include : Makefile
> lib/libcompiler_rt: Makefile
> lib/libcxx : Makefile
> lib/libcxxabi : Makefile
> share/mk : bsd.own.mk
>
> Log message:
> Change build infrastructure to allow building both gcc and clang. This
> doesn't actually flip the switch yet, so aarch64 continues to be the only
> architecture for which we build clang.
>
> ok jsg@, deraadt@
>
