include required cmake method

Author: zerotacg

ryzom/CMakeLists.txt

@@ -12,6 +12,8 @@ INCLUDE_DIRECTORIES(${CMAKE_CURRENT_SOURCE_DIR}/common)
 
 SET(RZ_SERVER_SRC_DIR ${CMAKE_CURRENT_SOURCE_DIR}/server/src)
 
+include(../cmake/add_project_library_alias.cmake)
+
 ADD_SUBDIRECTORY(common)
 ADD_SUBDIRECTORY(tools)
 ADD_SUBDIRECTORY(client)