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

[Richard Smith - zygoloid via Phabricator via cfe-commits]

rsmith added a comment.

This seems like it would break the opposite situation: a user places a custom clang and the corresponding libc++ somewhere (perhaps in `$HOME`, or perhaps they run Clang from the build tree). Right now we use the custom clang and its corresponding libc++, but with this change, I would expect we'd instead pick up the SDK version of libc++. Is that what we want?


Repository:
  rG LLVM Github Monorepo

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

https://reviews.llvm.org/D88984