Index: contrib/libexecinfo/execinfo.h
===================================================================
--- contrib/libexecinfo/execinfo.h
+++ contrib/libexecinfo/execinfo.h
@@ -32,6 +32,7 @@
 #ifndef _EXECINFO_H_
 #define _EXECINFO_H_
 
+#include <sys/cdefs.h>
 #include <stddef.h>
 
 __BEGIN_DECLS