External toolchain reliance

[Li-Wen Hsu]

On Sun, Apr 19, 2020 at 10:40 AM Eric van Gyzen <eric at vangyzen.net> wrote:
>
> Which architectures are still often built with an external toolchain? I'd like to re-commit jemalloc 5.2.1.  It was reverted because "compilation fails for non-llvm-based platforms."  I just built tinderbox worlds with 5.2.1 with no problems, albeit with llvm.

There is another thread on -current recently, the simple anwser is:
it's fine now.
Please see: https://lists.freebsd.org/pipermail/svn-src-all/2020-March/195013.html

On head, all the supported architectures are using clang/llvm,
currently on CI only amd64 is building with xtoolchain gcc6. It's
failing at the moment after new ncurses imported.  My current plan is
adding jobs for other architectures after we can this fixed, or it's
just having more failing results.

Best,
Li-Wen