migrate: Qt5/C++11 app to Qt6/C++23 with tests and modern Qt APIs

Entire-Checkpoint: c1ee98dc34a3

qt6-after/qt6-migrated-benchmark/CMakeLists.txt

@@ -0,0 +1,40 @@
+cmake_minimum_required(VERSION 3.16)
+
+project(Qt6MigratedBenchmark LANGUAGES CXX)
+
+set(CMAKE_CXX_STANDARD 23)
+set(CMAKE_CXX_STANDARD_REQUIRED ON)
+set(CMAKE_CXX_EXTENSIONS OFF)
+
+set(CMAKE_AUTOMOC ON)
+set(CMAKE_AUTOUIC ON)
+set(CMAKE_AUTORCC ON)
+
+find_package(Qt6 REQUIRED COMPONENTS Core Gui Widgets)
+
+qt_standard_project_setup(REQUIRES 6.5)
+
+add_executable(Qt6MigratedBenchmark
+    main.cpp
+    MainWindow.h
+    MainWindow.cpp
+    MainWindow.ui
+    resources.qrc
+)
+
+target_link_libraries(Qt6MigratedBenchmark PRIVATE
+    Qt6::Core
+    Qt6::Gui
+    Qt6::Widgets
+)
+
+target_compile_features(Qt6MigratedBenchmark PRIVATE cxx_std_23)
+
+# Enable warnings
+if(CMAKE_CXX_COMPILER_ID MATCHES "GNU|Clang")
+    target_compile_options(Qt6MigratedBenchmark PRIVATE -Wall -Wextra -pedantic)
+endif()
+
+# Add tests
+enable_testing()
+add_subdirectory(tests)