Add CXX directive

src/CMakeLists.txt

@@ -13,6 +13,7 @@ TARGET_LINK_LIBRARIES(artislib ${Boost_LIBRARIES})
 SET_TARGET_PROPERTIES(artislib PROPERTIES
         VERSION 0
         OUTPUT_NAME "artis-star-${ARTIS_VERSION_SHORT}"
+        LINKER_LANGUAGE CXX
         CLEAN_DIRECT_OUTPUT 1)
 
 INSTALL(TARGETS artislib RUNTIME DESTINATION bin LIBRARY DESTINATION