[CMake] Pass LLVM_EXTERNAL_*_SOURCE_DIR variables to subsequent stages
authorChris Bieneman <beanz@apple.com>
Wed, 10 Feb 2016 01:09:59 +0000 (01:09 +0000)
committerChris Bieneman <beanz@apple.com>
Wed, 10 Feb 2016 01:09:59 +0000 (01:09 +0000)
commitb33600fe6b728629fe7ba156ad066fac4f4ab90c
tree9353ad43824e16d34f2a75b246302ec093f00e3d
parenta0a0317dbc07a42777db3264938e8019eae39404
[CMake] Pass LLVM_EXTERNAL_*_SOURCE_DIR variables to subsequent stages

For multi-stage builds we need to pass any overridden source directory variables. Without passing these the subsequent stages won't find the project sources.

llvm-svn: 260341
clang/CMakeLists.txt