add coverage

CMakeLists.txt

@@ -4,6 +4,8 @@ project(bar)
 include(CTest)
 enable_testing()
 
+option(ENABLE_COVERAGE "Enable coverage flags" OFF)
+
 set(CMAKE_CXX_STANDARD 23)
 set(CMAKE_CXX_STANDARD_REQUIRED ON)
 set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
@@ -73,6 +75,11 @@ target_include_directories(bar_tests PRIVATE
 )
 target_link_libraries(bar_tests PRIVATE Catch2::Catch2WithMain)
 
+if(ENABLE_COVERAGE)
+    target_compile_options(bar_tests PRIVATE -O0 -g --coverage)
+    target_link_options(bar_tests PRIVATE --coverage)
+endif()
+
 include(Catch)
 catch_discover_tests(bar_tests)