[cmake] Handle external source for lld and libcxx
authorReid Kleckner <rnk@google.com>
Tue, 11 Aug 2015 17:18:23 +0000 (17:18 +0000)
committerReid Kleckner <rnk@google.com>
Tue, 11 Aug 2015 17:18:23 +0000 (17:18 +0000)
commitd3bb9244106a5a6d77fb5c91551ae0baffec72fc
tree3fb6c98ddf6e2ef705a3271d0deab3575af594a2
parentde98228fab8547e09cfec4e5f3ce2868997fa7e0
[cmake] Handle external source for lld and libcxx

As requested in post-commit review of r244549.

llvm-svn: 244634
compiler-rt/CMakeLists.txt