cmake_minimum_required(VERSION 3.8) ## ## PROJECT ## name and version ## project(nlohmann_json VERSION 3.1.2 LANGUAGES CXX) ## ## INCLUDE ## ## include(ExternalProject) ## ## OPTIONS ## option(JSON_BuildTests "Build the unit tests when BUILD_TESTING is enabled." ON) option(JSON_MultipleHeaders "Use non-amalgamated version of the library." OFF) ## ## CONFIGURATION ## set(NLOHMANN_JSON_TARGET_NAME ${PROJECT_NAME}) set(NLOHMANN_JSON_CONFIG_INSTALL_DIR "lib/cmake/${PROJECT_NAME}") set(NLOHMANN_JSON_INCLUDE_INSTALL_DIR "include") set(NLOHMANN_JSON_TARGETS_EXPORT_NAME "${PROJECT_NAME}Targets") set(NLOHMANN_JSON_CMAKE_CONFIG_TEMPLATE "cmake/config.cmake.in") set(NLOHMANN_JSON_CMAKE_CONFIG_DIR "${CMAKE_CURRENT_BINARY_DIR}/cmake_config") set(NLOHMANN_JSON_CMAKE_VERSION_CONFIG_FILE "${NLOHMANN_JSON_CMAKE_CONFIG_DIR}/${PROJECT_NAME}ConfigVersion.cmake") set(NLOHMANN_JSON_CMAKE_PROJECT_CONFIG_FILE "${NLOHMANN_JSON_CMAKE_CONFIG_DIR}/${PROJECT_NAME}Config.cmake") if (JSON_MultipleHeaders) set(NLOHMANN_JSON_INCLUDE_BUILD_DIR "${PROJECT_SOURCE_DIR}/include/") message(STATUS "Using the multi-header code from ${NLOHMANN_JSON_INCLUDE_BUILD_DIR}") else() set(NLOHMANN_JSON_INCLUDE_BUILD_DIR "${PROJECT_SOURCE_DIR}/single_include/") message(STATUS "Using the single-header code from ${NLOHMANN_JSON_INCLUDE_BUILD_DIR}") endif() ## ## TARGET ## create target and add include path ## add_library(${NLOHMANN_JSON_TARGET_NAME} INTERFACE) target_compile_features(${NLOHMANN_JSON_TARGET_NAME} INTERFACE cxx_std_11) target_include_directories( ${NLOHMANN_JSON_TARGET_NAME} INTERFACE $ $ ) ## add debug view definition file for msvc (natvis) if (MSVC) set(NLOHMANN_ADD_NATVIS TRUE) set(NLOHMANN_NATVIS_FILE "nlohmann_json.natvis") target_sources( ${NLOHMANN_JSON_TARGET_NAME} INTERFACE $ $ ) endif() ## ## TESTS ## create and configure the unit test target ## include(CTest) #adds option BUILD_TESTING (default ON) if(BUILD_TESTING AND JSON_BuildTests) enable_testing() add_subdirectory(test) endif() ## ## INSTALL ## install header files, generate and install cmake config files for find_package() ## include(CMakePackageConfigHelpers) write_basic_package_version_file( ${NLOHMANN_JSON_CMAKE_VERSION_CONFIG_FILE} COMPATIBILITY SameMajorVersion ) configure_package_config_file( ${NLOHMANN_JSON_CMAKE_CONFIG_TEMPLATE} ${NLOHMANN_JSON_CMAKE_PROJECT_CONFIG_FILE} INSTALL_DESTINATION ${NLOHMANN_JSON_CONFIG_INSTALL_DIR} ) install( DIRECTORY ${NLOHMANN_JSON_INCLUDE_BUILD_DIR} DESTINATION ${NLOHMANN_JSON_INCLUDE_INSTALL_DIR} ) install( FILES ${NLOHMANN_JSON_CMAKE_PROJECT_CONFIG_FILE} ${NLOHMANN_JSON_CMAKE_VERSION_CONFIG_FILE} DESTINATION ${NLOHMANN_JSON_CONFIG_INSTALL_DIR} ) if (NLOHMANN_ADD_NATVIS) install( FILES ${NLOHMANN_NATVIS_FILE} DESTINATION . ) endif() install( TARGETS ${NLOHMANN_JSON_TARGET_NAME} EXPORT ${NLOHMANN_JSON_TARGETS_EXPORT_NAME} INCLUDES DESTINATION ${NLOHMANN_JSON_INCLUDE_INSTALL_DIR} ) install( EXPORT ${NLOHMANN_JSON_TARGETS_EXPORT_NAME} DESTINATION ${NLOHMANN_JSON_CONFIG_INSTALL_DIR} )