Use Clang provided public API

- Drop our own private copy of the headers
- Use the CMake Config

***

Author: ktf

CMakeLists.txt

@@ -14,7 +14,7 @@ if( CMAKE_SOURCE_DIR STREQUAL CMAKE_CURRENT_SOURCE_DIR )
 
 
   # find clang + llvm
-  find_package(Clang REQUIRED)
+  find_package(Clang REQUIRED CONFIG)
 
   if( LLVM_FOUND )
     list(APPEND CMAKE_MODULE_PATH "${LLVM_CMAKE_DIR}")