tree 7b1eb492e8381423961f85a69cf617450662154c
parent add9f1a5dc1963149dac4cb8b25bf2cb825a02c2
author Louis Dionne <ldionne@apple.com> 1585847510 -0400
committer Louis Dionne <ldionne@apple.com> 1585847730 -0400

[libc++] Try to fix Chromium's build

Chromium's build sets LIBCXX_CXX_ABI_SYSTEM explicitly when building
libc++, which was broken by 61e89737c5da (which stopped listening to
that option). As a workaround, this commit uses the system libc++abi
when LIBCXX_CXX_ABI_SYSTEM is used.

However, we will need to work with Chromium to standardize their build
of libc++, because LIBCXX_CXX_ABI_SYSTEM is not a public facing build
configuration for libc++, and has never been AFAICT.