Hi,

This is another paper that was in my backlog for a while that I
finally managed to get to a releasable state. It proposes guidelines
for the way in which the build system and the compiler will
communicate with each other about the importable headers. It examines
some common requirements and suggests specific semantics for how
tooling handles header units. This proposal focuses on scenarios where
the approach of using a dynamic module mapper is not valid.

https://wg21.link/P2702R0

daniel