Googletest: Use add_qtc_library

add_qtc_library makes the code much more readable.

Change-Id: I60b397f3dc19de6911263c0818a25b41ab5a4209
Reviewed-by: Eike Ziller <eike.ziller@qt.io>
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>

src/libs/googletest/CMakeLists.txt

@@ -1,29 +1,27 @@
 set(GOOGLETEST_DIR ${CMAKE_CURRENT_LIST_DIR}/../3rdparty/googletest)
 
-if (EXISTS "${GOOGLETEST_DIR}/googletest")
-  add_library(Googletest STATIC
-    "${GOOGLETEST_DIR}/googletest/src/gtest-all.cc"
-    "${GOOGLETEST_DIR}/googlemock/src/gmock-all.cc"
-  )
-  target_include_directories(Googletest
-    PUBLIC
-      "${GOOGLETEST_DIR}/googletest/include"
-      "${GOOGLETEST_DIR}/googlemock/include"
-    PRIVATE
-      "${GOOGLETEST_DIR}/googletest"
-      "${GOOGLETEST_DIR}/googlemock"
-  )
-  set_target_properties(Googletest PROPERTIES AUTOMOC OFF AUTOUIC OFF QT_COMPILE_OPTIONS_DISABLE_WARNINGS ON)
-  set_property(TARGET Googletest PROPERTY POSITION_INDEPENDENT_CODE ON)
-
-  target_link_libraries(Googletest Threads::Threads)
+if(EXISTS "${GOOGLETEST_DIR}/googletest")
+  set(GOOGLETEST_SUBMODULE_IS_CHECKED_OUT YES)
 else()
-  message(STATUS "Googletest was not found. Please update the submodules with `git submodule update --init --recursive`.")
-  message(STATUS "Otherwise tests that depend on Googletest will be skipped.")
-  return()
+  set(GOOGLETEST_SUBMODULE_IS_CHECKED_OUT NO)
 endif()
 
-include(FeatureSummary)
-set_package_properties(Googletest PROPERTIES
+add_qtc_library(Googletest STATIC
+  CONDITION GOOGLETEST_SUBMODULE_IS_CHECKED_OUT
+  DEPENDS
+    Threads::Threads
+  PUBLIC_INCLUDES
+    "${GOOGLETEST_DIR}/googletest/include"
+    "${GOOGLETEST_DIR}/googlemock/include"
+  INCLUDES
+    "${GOOGLETEST_DIR}/googletest"
+    "${GOOGLETEST_DIR}/googlemock"
+  PROPERTIES
+    AUTOMOC OFF AUTOUIC OFF QT_COMPILE_OPTIONS_DISABLE_WARNINGS ON
+    POSITION_INDEPENDENT_CODE ON
   URL "https://github.com/google/googletest"
-  DESCRIPTION "Google Testing and Mocking Framework")
+  DESCRIPTION "Google Testing and Mocking Framework"
+  SOURCES
+    "${GOOGLETEST_DIR}/googletest/src/gtest-all.cc"
+    "${GOOGLETEST_DIR}/googlemock/src/gmock-all.cc"
+)