[*] Fix CMP0002 CMake problem

CMakeLists.txt

 cmake_minimum_required(VERSION 3.0)
-
+if(TARGET dap_test)
+    return() # The project has already been built.
+endif()
 project(dap_test)
 
 add_library(${PROJECT_NAME} STATIC dap_test.h dap_test.c)