cmake_minimum_required(VERSION 3.28) project(json_test CXX) set(NLOHMANN_JSON_BUILD_MODULES ON CACHE BOOL "Enable nlohmann.json module support") add_subdirectory(${CMAKE_CURRENT_SOURCE_DIR}/../.. ${CMAKE_CURRENT_BINARY_DIR}/tests) add_executable(json_test main.cpp) target_link_libraries(json_test PRIVATE nlohmann_json_modules ) target_compile_definitions(json_test PRIVATE NLOHMANN_JSON_BUILD_MODULES ) target_compile_features(json_test PUBLIC cxx_std_20)