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112 lines
3.4 KiB
CMake
112 lines
3.4 KiB
CMake
cmake_minimum_required(VERSION 3.6)
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##
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## PROJECT
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## name and version
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##
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project(nlohmann_json VERSION 3.5.0 LANGUAGES CXX)
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##
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## INCLUDE
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##
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##
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include(ExternalProject)
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##
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## OPTIONS
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##
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option(JSON_BuildTests "Build the unit tests when BUILD_TESTING is enabled." ON)
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option(JSON_MultipleHeaders "Use non-amalgamated version of the library." OFF)
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##
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## CONFIGURATION
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##
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set(NLOHMANN_JSON_TARGET_NAME ${PROJECT_NAME})
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set(NLOHMANN_JSON_CONFIG_INSTALL_DIR "lib/cmake/${PROJECT_NAME}"
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CACHE INTERNAL "")
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set(NLOHMANN_JSON_INCLUDE_INSTALL_DIR "include")
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set(NLOHMANN_JSON_TARGETS_EXPORT_NAME "${PROJECT_NAME}Targets")
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set(NLOHMANN_JSON_CMAKE_CONFIG_TEMPLATE "cmake/config.cmake.in")
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set(NLOHMANN_JSON_CMAKE_CONFIG_DIR "${CMAKE_CURRENT_BINARY_DIR}")
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set(NLOHMANN_JSON_CMAKE_VERSION_CONFIG_FILE "${NLOHMANN_JSON_CMAKE_CONFIG_DIR}/${PROJECT_NAME}ConfigVersion.cmake")
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set(NLOHMANN_JSON_CMAKE_PROJECT_CONFIG_FILE "${NLOHMANN_JSON_CMAKE_CONFIG_DIR}/${PROJECT_NAME}Config.cmake")
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set(NLOHMANN_JSON_CMAKE_PROJECT_TARGETS_FILE "${NLOHMANN_JSON_CMAKE_CONFIG_DIR}/${PROJECT_NAME}Targets.cmake")
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if (JSON_MultipleHeaders)
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set(NLOHMANN_JSON_INCLUDE_BUILD_DIR "${PROJECT_SOURCE_DIR}/include/")
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message(STATUS "Using the multi-header code from ${NLOHMANN_JSON_INCLUDE_BUILD_DIR}")
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else()
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set(NLOHMANN_JSON_INCLUDE_BUILD_DIR "${PROJECT_SOURCE_DIR}/single_include/")
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message(STATUS "Using the single-header code from ${NLOHMANN_JSON_INCLUDE_BUILD_DIR}")
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endif()
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##
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## TARGET
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## create target and add include path
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##
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add_library(${NLOHMANN_JSON_TARGET_NAME} INTERFACE)
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add_library(${PROJECT_NAME}::${NLOHMANN_JSON_TARGET_NAME} ALIAS ${NLOHMANN_JSON_TARGET_NAME})
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target_include_directories(
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${NLOHMANN_JSON_TARGET_NAME}
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INTERFACE
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$<BUILD_INTERFACE:${NLOHMANN_JSON_INCLUDE_BUILD_DIR}>
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$<INSTALL_INTERFACE:include>
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)
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## add debug view definition file for msvc (natvis)
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if (MSVC)
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set(NLOHMANN_ADD_NATVIS TRUE)
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set(NLOHMANN_NATVIS_FILE "nlohmann_json.natvis")
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target_sources(
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${NLOHMANN_JSON_TARGET_NAME}
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INTERFACE
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$<INSTALL_INTERFACE:${NLOHMANN_NATVIS_FILE}>
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$<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/${NLOHMANN_NATVIS_FILE}>
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)
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endif()
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##
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## INSTALL
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## install header files, generate and install cmake config files for find_package()
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##
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include(CMakePackageConfigHelpers)
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write_basic_package_version_file(
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${NLOHMANN_JSON_CMAKE_VERSION_CONFIG_FILE} COMPATIBILITY SameMajorVersion
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)
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configure_file(
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${NLOHMANN_JSON_CMAKE_CONFIG_TEMPLATE}
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${NLOHMANN_JSON_CMAKE_PROJECT_CONFIG_FILE}
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@ONLY
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)
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#install(
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# DIRECTORY ${NLOHMANN_JSON_INCLUDE_BUILD_DIR}
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# DESTINATION ${NLOHMANN_JSON_INCLUDE_INSTALL_DIR}
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#)
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#install(
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# FILES ${NLOHMANN_JSON_CMAKE_PROJECT_CONFIG_FILE} ${NLOHMANN_JSON_CMAKE_VERSION_CONFIG_FILE}
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# DESTINATION ${NLOHMANN_JSON_CONFIG_INSTALL_DIR}
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#)
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if (NLOHMANN_ADD_NATVIS)
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#install(
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# FILES ${NLOHMANN_NATVIS_FILE}
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# DESTINATION .
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#)
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endif()
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export(
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TARGETS ${NLOHMANN_JSON_TARGET_NAME}
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NAMESPACE ${PROJECT_NAME}::
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FILE ${NLOHMANN_JSON_CMAKE_PROJECT_TARGETS_FILE}
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)
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#install(
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# TARGETS ${NLOHMANN_JSON_TARGET_NAME}
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#EXPORT ${NLOHMANN_JSON_TARGETS_EXPORT_NAME}
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#INCLUDES DESTINATION ${NLOHMANN_JSON_INCLUDE_INSTALL_DIR}
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#)
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#install(
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#EXPORT ${NLOHMANN_JSON_TARGETS_EXPORT_NAME}
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#NAMESPACE ${PROJECT_NAME}::
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#DESTINATION ${NLOHMANN_JSON_CONFIG_INSTALL_DIR}
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#)
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