21:14 John Baldwin (jhb) 

base/*: Remove the base ports to install an external toolchain in /usr.

This was originally motivated for providing a native toolchain for
platforms not supported by the in-tree LLVM toolchain.  Now, however,
all of our current platforms are well supported by the in-tree LLVM
toolchain.  In addition, these ports required additional maintenance
beyond the existing devel/binutils and devel/freebsd-gccX ports.  A
more sustainable path if we need this in the future is probably to
have simple wrappers for /usr/bin/cc and other binaries in /usr that
redirect to binaries provided by the existing devel/ ports.

Reviewed by:	bapt
Differential Revision:	https://reviews.freebsd.org/D38561

    2ed924f

20:11 jhb 

Rename base/gcc to base/gcc6.

This is in preparation for adding a base/gcc9 port.

While here, update to GCC 6.5.0.

Share packing lists with the freebsd-gcc6 port as much as posible.
Split most of the freebsd-gcc6 pkg-plist into a pkg-plist.common that
lists arch-independent files under lib/.  Change base/gcc6 to use the
arch-specific packing lists and pkg-list.common from freebsd-gcc6.  In
addition, hook up packing lists for the remaining archs supported by
freebsd-gcc6 but not base/gcc6: aarch64 and sparc64.

Reviewed by:	bapt
Differential Revision:	https://reviews.freebsd.org/D22900