On Fri, Jan 8, 2021 at 2:25 AM John Ericson [off-list ref] wrote:

I'm sure you all actively working on this project will have more to say than me, but in the interest of keeping track of loose ends I made in the first place, I

 - Posted https://internals.rust-lang.org/t/dogfooding-z-build-std-in-rustbuild/13775 about how -Z build-std could get more polish
 - poked https://github.com/rust-lang/rust/pull/77916

Hope some of that is of interest,

Of course it is!

On the topic of -Z build-std, I have been working on [1] which
integrates the building of core, alloc, etc. in Kbuild instead of
using build-std.

In the end, it turned out to be easier than I expected, which was a
pleasure. While the particular build steps may not always remain the
same (perhaps due to change of editions, splits into smaller crates,
etc.), I think it is a good idea, nevertheless, to keep the building
of these few critical crates as simple as reasonably possible for
projects that don't use Cargo -- even if build-std stabilizes, starts
getting used by rustbuild itself, etc.

[1] https://github.com/Rust-for-Linux/linux/pull/52

Cheers,
Miguel