Index: lib/IlmCtl/CtlExc.cpp
--- lib/IlmCtl/CtlExc.cpp.orig
+++ lib/IlmCtl/CtlExc.cpp
@@ -58,7 +58,7 @@
 #ifdef _WIN32
 	#include <malloc.h>
 #else
-	#include <alloca.h>
+	#include <stdlib.h>
 #endif
 #include <string.h>
 
