lokinet/vendor/nlohmann/CMakeLists.txt
2019-03-04 11:10:35 -05:00

112 lines
3.4 KiB
CMake

cmake_minimum_required(VERSION 3.7)
##
## PROJECT
## name and version
##
project(nlohmann_json VERSION 3.5.0 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}"
CACHE INTERNAL "")
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}")
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")
set(NLOHMANN_JSON_CMAKE_PROJECT_TARGETS_FILE "${NLOHMANN_JSON_CMAKE_CONFIG_DIR}/${PROJECT_NAME}Targets.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)
add_library(${PROJECT_NAME}::${NLOHMANN_JSON_TARGET_NAME} ALIAS ${NLOHMANN_JSON_TARGET_NAME})
target_include_directories(
${NLOHMANN_JSON_TARGET_NAME}
INTERFACE
$<BUILD_INTERFACE:${NLOHMANN_JSON_INCLUDE_BUILD_DIR}>
$<INSTALL_INTERFACE:include>
)
## 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
$<INSTALL_INTERFACE:${NLOHMANN_NATVIS_FILE}>
$<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/${NLOHMANN_NATVIS_FILE}>
)
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_file(
${NLOHMANN_JSON_CMAKE_CONFIG_TEMPLATE}
${NLOHMANN_JSON_CMAKE_PROJECT_CONFIG_FILE}
@ONLY
)
#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()
export(
TARGETS ${NLOHMANN_JSON_TARGET_NAME}
NAMESPACE ${PROJECT_NAME}::
FILE ${NLOHMANN_JSON_CMAKE_PROJECT_TARGETS_FILE}
)
#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}
#NAMESPACE ${PROJECT_NAME}::
#DESTINATION ${NLOHMANN_JSON_CONFIG_INSTALL_DIR}
#)