[all-commits] [llvm/llvm-project] a3870e: Reapply [runtimes] Set more paths when building ru...

[Martin Storsjö via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: a3870e8ab164e796da4fe48c6abf899d79c09f6d
      https://github.com/llvm/llvm-project/commit/a3870e8ab164e796da4fe48c6abf899d79c09f6d
  Author: Martin Storsjö <martin at martin.st>
  Date:   2021-09-09 (Thu, 09 Sep 2021)

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

  Log Message:
  -----------
  Reapply [runtimes] Set more paths when building runtimes standalone

These paths are needed when building with per-target runtime directories.

(It's possible to fix this by manually setting these when invoking
cmake, but one isn't supposed to need to do that.)

Also set LLVM_TOOLS_BINARY_DIR while touching this area (as it's
also unset in this case) even if it isn't specifically needed by the
per-target runtime configuration.

Fixed since previous attempt: Don't check if the runtimes directory
is the root of the CMake invocation; when the main LLVM CMake
build builds runtimes, it does invoke a sub-CMake with this directory
as the root too, just as if manually invoking CMake at the runtimes
directory. Instead check whether LLVM_TOOLS_BINARY_DIR was set and
whether find_package(LLVM) succeeded or not.

Differential Revision: https://reviews.llvm.org/D107895