Index: include/llvm/Support/SwapByteOrder.h
===================================================================
--- include/llvm/Support/SwapByteOrder.h
+++ include/llvm/Support/SwapByteOrder.h
@@ -18,6 +18,9 @@
 #include "llvm/Support/Compiler.h"
 #include "llvm/Support/DataTypes.h"
 #include <cstddef>
+#if defined(_MSC_VER) && !defined(_DEBUG)
+#include <stdlib.h>
+#endif
 
 namespace llvm {
 namespace sys {
Index: lib/Support/Windows/Signals.inc
===================================================================
--- lib/Support/Windows/Signals.inc
+++ lib/Support/Windows/Signals.inc
@@ -28,6 +28,7 @@
 #ifdef __MINGW32__
  #include <imagehlp.h>
 #else
+ #include <crtdbg.h>
  #include <dbghelp.h>
 #endif
 #include <psapi.h>