mirror of
https://github.com/nlohmann/json
synced 2024-11-22 20:10:06 +00:00
ad103e5b45
* Refactor unit test creation
Add functions for creating tests and to supply test- and
standard-specific build settings.
Raises minimum CMake version to 3.13 in test directory.
json_test_add_test_for(
<file>
MAIN <main>
[CXX_STANDARDS <version_number>...] [FORCE])
Given a <file> unit-foo.cpp, produces
test-foo_cpp<version_number>
if C++ standard <version_number> is supported by the compiler and
thesource file contains JSON_HAS_CPP_<version_number>. Use FORCE to
create the test regardless of the file containing
JSON_HAS_CPP_<version_number>. Test targets are linked against <main>.
CXX_STANDARDS defaults to "11".
json_test_set_test_options(
all|<tests>
[CXX_STANDARDS all|<args>...]
[COMPILE_DEFINITIONS <args>...]
[COMPILE_FEATURES <args>...]
[COMPILE_OPTIONS <args>...]
[LINK_LIBRARIES <args>...]
[LINK_OPTIONS <args>...])
Supply test- and standard-specific build settings.
Specify multiple tests using a list e.g., "test-foo;test-bar".
Must be called BEFORE the test is created.
* Use CMAKE_MODULE_PATH
* Don't undef some macros if JSON_TEST_KEEP_MACROS is defined
* Use JSON_TEST_KEEP_MACROS
Incidentally enables the regression tests for #2546 and #3070.
A CHECK_THROWS_WITH_AS in #3070 was disabled which is tracked in #3377
and a line in from_json(..., std_fs::path&) was marked with LCOV_EXCL_LINE.
* Add three-way comparison feature test macro
* Disable broken comparison if JSON_HAS_THREE_WAY_COMPARISON
* Fix redefinition of inline constexpr statics
Redelcaration of inline constexpr static data members in namespace scope
was deprecated in C++17. Fixes -Werror=deprecated compilation failures.
* Fix more test build failures due to missing noexcept
* CI: update cmake_flags test to use CMake 3.13 in test directory
Also change default for JSON_BuildTests option to depend on CMake
version.
* CI: turn *_CXXFLAGS into CMake lists
* CI: use JSON_TestStandards to set CXX_STANDARD
* CI: pass extra CXXFLAGS to standards tests
196 lines
6.1 KiB
CMake
196 lines
6.1 KiB
CMake
cmake_minimum_required(VERSION 3.1)
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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 3.10.5 LANGUAGES CXX)
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##
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## MAIN_PROJECT CHECK
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## determine if nlohmann_json is built as a subproject (using add_subdirectory) or if it is the main project
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##
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set(MAIN_PROJECT OFF)
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if (CMAKE_CURRENT_SOURCE_DIR STREQUAL CMAKE_SOURCE_DIR)
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set(MAIN_PROJECT ON)
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endif()
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##
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## INCLUDE
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##
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##
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set(CMAKE_MODULE_PATH ${CMAKE_CURRENT_SOURCE_DIR}/cmake ${CMAKE_MODULE_PATH})
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include(ExternalProject)
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##
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## OPTIONS
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##
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if (POLICY CMP0077)
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# Allow CMake 3.13+ to override options when using FetchContent / add_subdirectory.
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cmake_policy(SET CMP0077 NEW)
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endif ()
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# VERSION_GREATER_EQUAL is not available in CMake 3.1
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if(${MAIN_PROJECT} AND (${CMAKE_VERSION} VERSION_EQUAL 3.13 OR ${CMAKE_VERSION} VERSION_GREATER 3.13))
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set(JSON_BuildTests_INIT ON)
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else()
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set(JSON_BuildTests_INIT OFF)
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endif()
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option(JSON_BuildTests "Build the unit tests when BUILD_TESTING is enabled." ${JSON_BuildTests_INIT})
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option(JSON_CI "Enable CI build targets." OFF)
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option(JSON_Diagnostics "Use extended diagnostic messages." OFF)
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option(JSON_ImplicitConversions "Enable implicit conversions." ON)
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option(JSON_Install "Install CMake targets during install step." ${MAIN_PROJECT})
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option(JSON_MultipleHeaders "Use non-amalgamated version of the library." OFF)
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option(JSON_SystemInclude "Include as system headers (skip for clang-tidy)." OFF)
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if (JSON_CI)
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include(ci)
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endif ()
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##
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## CONFIGURATION
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##
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include(GNUInstallDirs)
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set(NLOHMANN_JSON_TARGET_NAME ${PROJECT_NAME})
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set(NLOHMANN_JSON_CONFIG_INSTALL_DIR "${CMAKE_INSTALL_LIBDIR}/cmake/${PROJECT_NAME}" CACHE INTERNAL "")
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set(NLOHMANN_JSON_INCLUDE_INSTALL_DIR "${CMAKE_INSTALL_INCLUDEDIR}")
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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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set(NLOHMANN_JSON_PKGCONFIG_INSTALL_DIR "${CMAKE_INSTALL_LIBDIR}/pkgconfig")
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if (JSON_MultipleHeaders)
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set(NLOHMANN_JSON_INCLUDE_BUILD_DIR "${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 ${NLOHMANN_JSON_INCLUDE_BUILD_DIR}")
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endif()
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if (NOT JSON_ImplicitConversions)
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message(STATUS "Implicit conversions are disabled")
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endif()
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if (JSON_Diagnostics)
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message(STATUS "Diagnostics enabled")
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endif()
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if (JSON_SystemInclude)
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set(NLOHMANN_JSON_SYSTEM_INCLUDE "SYSTEM")
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endif()
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##
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## TARGET
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## create target and add include path
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##
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add_library(${NLOHMANN_JSON_TARGET_NAME} INTERFACE)
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add_library(${PROJECT_NAME}::${NLOHMANN_JSON_TARGET_NAME} ALIAS ${NLOHMANN_JSON_TARGET_NAME})
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if (${CMAKE_VERSION} VERSION_LESS "3.8.0")
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target_compile_features(${NLOHMANN_JSON_TARGET_NAME} INTERFACE cxx_range_for)
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else()
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target_compile_features(${NLOHMANN_JSON_TARGET_NAME} INTERFACE cxx_std_11)
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endif()
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target_compile_definitions(
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${NLOHMANN_JSON_TARGET_NAME}
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INTERFACE
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JSON_USE_IMPLICIT_CONVERSIONS=$<BOOL:${JSON_ImplicitConversions}>
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JSON_DIAGNOSTICS=$<BOOL:${JSON_Diagnostics}>
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)
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target_include_directories(
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${NLOHMANN_JSON_TARGET_NAME}
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${NLOHMANN_JSON_SYSTEM_INCLUDE} INTERFACE
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$<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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# Install a pkg-config file, so other tools can find this.
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CONFIGURE_FILE(
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"${CMAKE_CURRENT_SOURCE_DIR}/cmake/pkg-config.pc.in"
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"${CMAKE_CURRENT_BINARY_DIR}/${PROJECT_NAME}.pc"
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)
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##
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## TESTS
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## create and configure the unit test target
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##
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if (JSON_BuildTests)
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include(CTest)
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enable_testing()
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add_subdirectory(test)
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endif()
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##
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## INSTALL
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## install header files, generate and install cmake config files for find_package()
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##
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include(CMakePackageConfigHelpers)
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# use a custom package version config file instead of
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# write_basic_package_version_file to ensure that it's architecture-independent
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# https://github.com/nlohmann/json/issues/1697
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configure_file(
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"cmake/nlohmann_jsonConfigVersion.cmake.in"
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${NLOHMANN_JSON_CMAKE_VERSION_CONFIG_FILE}
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@ONLY
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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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if(JSON_Install)
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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 ${NLOHMANN_JSON_CONFIG_INSTALL_DIR}
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)
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install(
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FILES "${CMAKE_CURRENT_BINARY_DIR}/${PROJECT_NAME}.pc"
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DESTINATION ${NLOHMANN_JSON_PKGCONFIG_INSTALL_DIR}
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)
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endif()
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