add WITH_TESTING

paddle/majel/CMakeLists.txt

 cmake_minimum_required(VERSION 3.0)
 
-if(GTEST_INCLUDE_DIR AND GTEST_LIBRARIES)
-    message("-- Found gtest (include: ${GTEST_INCLUDE_DIR}, library: ${GTEST_LIBRARIES})")
-else()
+if(${CMAKE_CURRENT_SOURCE_DIR} STREQUAL ${CMAKE_SOURCE_DIR})
     # find #include <majel/xx.h>
     get_filename_component(PARENT_DIR ${CMAKE_CURRENT_SOURCE_DIR} DIRECTORY)
     include_directories(${PARENT_DIR})
@@ -18,6 +16,8 @@ else()
     set(THIRD_PARTY_PATH ${CMAKE_CURRENT_SOURCE_DIR}/third_party)
     set(WITH_TESTING ON)
     include(external/gtest)
+else()
+    message("-- Found gtest (include: ${GTEST_INCLUDE_DIR}, library: ${GTEST_LIBRARIES})")
 endif()
 
 ########################### Build Majel #############################
@@ -29,6 +29,9 @@ if(CUDA_FOUND)
 else()
     add_library(majel ${MAJEL_CXX_FILES})
 endif()
+add_dependencies(majel ${external_project_dependencies})
 #####################################################################
 
-add_subdirectory(test)
+if(WITH_TESTING)
+    add_subdirectory(test)
+endif()
\ No newline at end of file