frameworks must be linked weakly so the symbols are resolved on runtime

Author: PeterPetrik

src/native/CMakeLists.txt

@@ -30,7 +30,7 @@ IF(APPLE)
       MESSAGE(FATAL_ERROR "Couldn't find Apple's '${_lib}' framework or library")
     ENDIF(NOT APPLE_${_lib_var}_LIBRARY)
 
-    LIST(APPEND NATIVE_LINK_LIBS "-framework ${_lib}")
+    LIST(APPEND NATIVE_LINK_LIBS "-weak_framework ${_lib}")
   ENDFOREACH(_lib ${APPLE_LIB_LIST})
 ENDIF(APPLE)