Coding Convention: Sorting Order of Includes?

[Gedare Bloom]

Hello all,

Vijay noted in another thread that:
"For RTEMS, I don't see any preference mentioned in the docs for the
order or includes:
https://docs.rtems.org/branches/master/eng/coding-conventions.html

In libbsd, however, the FreeBSD style guide is followed which has a
preference for the order of header includes:
https://www.freebsd.org/cgi/man.cgi?query=style&apropos=0&sektion=9"

Should we consider any rules? I would suspect that at least ordering
by API layering could be helpful. Lexical sorting is nice but probably
there will be some exceptions based on dependencies.

Gedare