--- a/src/cx/map.h	Tue Mar 21 17:18:29 2023 +0100
+++ b/src/cx/map.h	Tue Mar 21 17:21:20 2023 +0100
@@ -46,6 +46,10 @@
 extern "C" {
 #endif
 
+#ifndef CX_STORE_POINTERS
+#define CX_STORE_POINTERS 0
+#endif
+
 /** Type for the UCX map. */
 typedef struct cx_map_s CxMap;