[PATCH] D88984: Prefer libc++ headers in the -isysroot over the toolchain

[Raphael Isemann via Phabricator via cfe-commits]

teemperor added a comment.

On macOS, LLDB's tests pass `-isysroot /path/to/SDK` to Clang but expect that Clang always prefers the the libc++ headers that are in the Clang build directory. So if we change this behaviour then we should have a way to keep the old behaviour around.


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D88984/new/

https://reviews.llvm.org/D88984