---

project/CMakeLists.txt

@@ -13,5 +13,13 @@ foreach(dir ${directories})
                 endif ()
             endif ()
         endif()
+    else()
+        if(IS_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}/${dir})
+            if (EXISTS "${CMAKE_CURRENT_SOURCE_DIR}/${dir}/CMakeLists.txt")
+                add_subdirectory(${CMAKE_CURRENT_SOURCE_DIR}/${dir})
+            else ()
+                message("Can't find dir: " "${CMAKE_SOURCE_DIR}/${dir}/CMakeLists.txt")
+            endif ()
+        endif ()
     endif ()
 endforeach()