+# FIXME: It may be removed when we use 2.8.12.
+if(CMAKE_VERSION VERSION_LESS 2.8.12)
+ # Invalidate a couple of keywords.
+ set(cmake_2_8_12_INTERFACE)
+ set(cmake_2_8_12_PRIVATE)
+else()
+ # Use ${cmake_2_8_12_KEYWORD} intead of KEYWORD in target_link_libraries().
+ set(cmake_2_8_12_INTERFACE INTERFACE)
+ set(cmake_2_8_12_PRIVATE PRIVATE)
+ if(POLICY CMP0022)
+ cmake_policy(SET CMP0022 NEW) # automatic when 2.8.12 is required
+ endif()