[PATCH] [libcxxabi] Teach CMake better ways to find the libc++ source directory (and misc cleanup).

[Eric Fiselier]

Address @jroelofs comments.


================
Comment at: CMakeLists.txt:149
@@ +148,3 @@
+if (LIBCXXABI_LIBCXX_PATH STREQUAL "LIBCXXABI_LIBCXX_PATH-NOTFOUND")
+  message(WARNING "LIBCXXABI_LIBCXX_PATH was not specified and couldn't be infered.")
+  set(LIBCXXABI_LIBCXX_PATH "")
----------------
jroelofs wrote:
> shouldn't this be an error?
Probably not. Currently we only need the libc++ source directory if we run the tests. Otherwise finding the headers is enough to just build it. If we make this an error we lose the ability to build libc++abi without the libc++ sources.

http://reviews.llvm.org/D7130

EMAIL PREFERENCES
  http://reviews.llvm.org/settings/panel/emailpreferences/