cmake_minimum_required(VERSION 3.1) project(DummyImport CXX) set(JSON_BuildTests OFF CACHE INTERNAL "") add_subdirectory(${nlohmann_json_source} ${CMAKE_CURRENT_BINARY_DIR}/nlohmann_json) add_executable(with_namespace_target main.cpp) target_link_libraries(with_namespace_target nlohmann_json::nlohmann_json) add_executable(without_namespace_target main.cpp) target_link_libraries(without_namespace_target nlohmann_json) if(NOT MSVC) add_executable(without_exceptions main.cpp) target_link_libraries(without_exceptions nlohmann_json::nlohmann_json) target_compile_definitions(without_exceptions PRIVATE JSON_NOEXCEPTION) target_compile_options(without_exceptions PRIVATE -fno-exceptions) endif()