Index: llvm-toolchain-4.0-4.0.1~+rc3/lldb/include/lldb/Utility/TaskPool.h
===================================================================
--- llvm-toolchain-4.0-4.0.1~+rc3.orig/lldb/include/lldb/Utility/TaskPool.h
+++ llvm-toolchain-4.0-4.0.1~+rc3/lldb/include/lldb/Utility/TaskPool.h
@@ -33,6 +33,7 @@
 #include <queue>
 #include <thread>
 #include <vector>
+#include <functional>
 
 // Global TaskPool class for running tasks in parallel on a set of worker thread
 // created the first