gtest as an external dependency

Author: viacheslauK

external/CMakeLists.txt

@@ -4,6 +4,10 @@ if (${CMAKE_SOURCE_DIR} STREQUAL ${CMAKE_BINARY_DIR})
     message(FATAL_ERROR "In-source build is not supported!")
 endif()
 
+if (${REPO_OPTION_PREFIX}_ENABLE_TESTS AND (NOT TARGET gtest))
+    add_subdirectory(gtest)
+endif()
+
 add_subdirectory(boost)
 add_subdirectory(paho_mqtt_c)
 add_subdirectory(rapidjson)

external/gtest/CMakeLists.txt

@@ -0,0 +1,2 @@
+opendaq_set_cmake_folder_context(TARGET_FOLDER_NAME)
+opendaq_module_setup_gtest("1.12.1")