Changes for intel Mac OSX build

world/CMakeLists.txt

@@ -84,7 +84,9 @@ IF(UNIX)
 	TARGET_LINK_LIBRARIES(world "${CMAKE_DL_LIBS}")
 	TARGET_LINK_LIBRARIES(world "z")
 	TARGET_LINK_LIBRARIES(world "m")
-	TARGET_LINK_LIBRARIES(world "rt")
+	IF(NOT DARWIN)
+		TARGET_LINK_LIBRARIES(world "rt")
+	ENDIF(NOT DARWIN)
 	TARGET_LINK_LIBRARIES(world "pthread")
 	ADD_DEFINITIONS(-fPIC)
 ENDIF(UNIX)

world/net.cpp

@@ -56,7 +56,7 @@
 	#include <sys/ipc.h>
 	#include <sys/sem.h>
 	#include <sys/shm.h>
-	#ifndef FREEBSD
+	#if not defined (FREEBSD) && not defined (DARWIN)
 		union semun {
 			int val;
 			struct semid_ds *buf;