--- a/tools/clang/tools/CMakeLists.txt	2017-08-03 20:37:25.000000000 -0700
+++ b/tools/clang/tools/CMakeLists.txt	2017-08-03 20:38:20.000000000 -0700
@@ -30,3 +30,4 @@
 
 # libclang may require clang-tidy in clang-tools-extra.
 add_clang_subdirectory(libclang)
+add_subdirectory(include-what-you-use)