diff --git a/clang/CMakeLists.txt b/clang/CMakeLists.txt
index f7099ac7653b74a98b693ef1e227abc488bc1272..0ad0557420c543d98e8c150757c7c80f548f441b 100644
--- a/clang/CMakeLists.txt
+++ b/clang/CMakeLists.txt
@@ -66,6 +66,11 @@ if( CMAKE_SOURCE_DIR STREQUAL CMAKE_CURRENT_SOURCE_DIR )
   set( CMAKE_ARCHIVE_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/lib )
 
   set( CLANG_BUILT_STANDALONE 1 )
+
+  find_package(LibXml2)
+  if (LIBXML2_FOUND)
+    set(CLANG_HAVE_LIBXML 1)
+  endif ()
 endif()
 
 set(CLANG_RESOURCE_DIR "" CACHE STRING