From Eric Wing, "I added a warning message for Mac users about the Un…

…iversal Binary

problem."

CMakeLists.txt

@@ -3,6 +3,9 @@ IF(WIN32)
 ELSE(WIN32)
     IF(APPLE)
         CMAKE_MINIMUM_REQUIRED(VERSION 2.4.6 FATAL_ERROR)
+		IF(${CMAKE_MAJOR_VERSION} EQUAL 2 AND ${CMAKE_MINOR_VERSION} EQUAL 4 AND ${CMAKE_PATCH_VERSION} LESS 7)
+			MESSAGE("Warning: A critical CMake bug exists in 2.4.6 and below. Trying to build Universal Binaries will result in a compile error that seems unrelated. Either avoid building Universal Binaries by changing the CMAKE_OSX_ARCHITECTURES field to list only your architecture, or upgrade to the current CVS version of CMake or a newer stable version if it exists.")
+		ENDIF(${CMAKE_MAJOR_VERSION} EQUAL 2 AND ${CMAKE_MINOR_VERSION} EQUAL 4 AND ${CMAKE_PATCH_VERSION} LESS 7)
     ELSE(APPLE)
         CMAKE_MINIMUM_REQUIRED(VERSION 2.4.0 FATAL_ERROR)
     ENDIF(APPLE)