[PATCH] D33635: [libcxxabi] rework CMakeLists.txt into modules

[Martell Malone via Phabricator via llvm-commits]

martell created this revision.
Herald added a subscriber: mgorny.

libcxxabi was having issues with detecting flags in `config-ix.cmake`correctly when cross compiling.
I narrowed it down to changes as a result of including

  list(APPEND CMAKE_MODULE_PATH "${LLVM_CMAKE_PATH}")
  include("${LLVM_CMAKE_PATH}/AddLLVM.cmake")
  include("${LLVM_CMAKE_PATH}/HandleLLVMOptions.cmake")

The best way to solve this was to rework CMake to use modules to mirror libcxx.
This makes the cmake source more readable and maintainable


Repository:
  rL LLVM

https://reviews.llvm.org/D33635

Files:
  CMakeLists.txt
  cmake/Modules/HandleLibcxxabiFlags.cmake
  cmake/Modules/HandleOutOfTreeLLVM.cmake
  cmake/Modules/MacroEnsureOutOfSourceBuild.cmake
  src/CMakeLists.txt

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