tree 7a87a1fbd6f885910a836dc470e35cc02115e7d1
parent 709298d89d4da698de680aa290da8fb9120b2add
author Louis Dionne <ldionne@apple.com> 1584050480 -0400
committer Copybara-Service <copybara-worker@google.com> 1598601879 -0700

Enforce that libc++ and libc++abi are built in a monorepo layout

We will soon start removing technical debt and sharing code between the
two directories, so this first step is meant to discover potential places
where the libraries are built outside of a monorepo layout. I imagine
this could happen as a remnant of the pre-monorepo setup.

This was discussed on the libcxx-dev mailing list and we got overall
consensus on the direction. All consumers of libc++ and libc++abi
should already be doing so through the monorepo, however it is
possible that we catch some stragglers with this patch, in which
case it may need to be reverted temporarily.

Differential Revision: https://reviews.llvm.org/D76102

GitOrigin-RevId: 19aec8c90492435b1ff59dacd4307f1bbcf6ab1d