[all-commits] [llvm/llvm-project] 8bc62d: [libc++] Remove support for building through llvm-...

[Louis Dionne via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: 8bc62db272448035d60ca9f31ff67040a288063c
      https://github.com/llvm/llvm-project/commit/8bc62db272448035d60ca9f31ff67040a288063c
  Author: Louis Dionne <ldionne at apple.com>
  Date:   2020-06-26 (Fri, 26 Jun 2020)

  Changed paths:
    M libcxx/cmake/Modules/HandleLibCXXABI.cmake
    M libcxx/cmake/Modules/HandleOutOfTreeLLVM.cmake
    M libcxx/include/CMakeLists.txt

  Log Message:
  -----------
  [libc++] Remove support for building through llvm-config

We've decided to move away from that by requiring that libc++ is built
as part of the monorepo a while ago. This commit removes code pertaining
to that unsupported use case and produces a clear error when the user
violates that.

In fact, building outside of the monorepo will still work as long as
LLVM_PATH is pointing to the root of the LLVM project, although that
is not officially supported.