Index: lib/fuzzer/CMakeLists.txt
===================================================================
--- lib/fuzzer/CMakeLists.txt
+++ lib/fuzzer/CMakeLists.txt
@@ -1,3 +1,25 @@
+if (CMAKE_SOURCE_DIR STREQUAL CMAKE_CURRENT_SOURCE_DIR)
+  cmake_minimum_required(VERSION 3.4.3)
+
+	project(CompilerRTFuzzer C CXX)
+  set(COMPILER_RT_STANDALONE_BUILD TRUE)
+  list(INSERT CMAKE_MODULE_PATH 0
+    "${CMAKE_SOURCE_DIR}/../../cmake"
+    "${CMAKE_SOURCE_DIR}/../../cmake/Modules")
+  include(base-config-ix)
+  include(CompilerRTUtils)
+
+  load_llvm_config()
+  construct_compiler_rt_default_triple()
+
+  include(config-ix)
+
+  if(APPLE)
+    include(CompilerRTDarwinUtils)
+  endif()
+  include(AddCompilerRT)
+endif()
+
 set(LIBFUZZER_SOURCES
   FuzzerClangCounters.cpp
   FuzzerCrossOver.cpp