cmake_minimum_required(VERSION 3.9 FATAL_ERROR)

##
## PROJECT
## name and version
##
project(nlohmann_json VERSION 3.10.4 LANGUAGES CXX)


##
## OPTIONS
##
option(JSON_MultipleHeaders "Use non-amalgamated version of the library." ON)

##
## CONFIGURATION
##
set(NLOHMANN_JSON_TARGET_NAME               ${PROJECT_NAME})

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 ${NLOHMANN_JSON_TARGET_NAME})
if (${CMAKE_VERSION} VERSION_LESS "3.8.0")
    target_compile_features(${NLOHMANN_JSON_TARGET_NAME} INTERFACE cxx_range_for)
else()
    target_compile_features(${NLOHMANN_JSON_TARGET_NAME} INTERFACE cxx_std_11)
endif()

target_include_directories(${NLOHMANN_JSON_TARGET_NAME} INTERFACE ${NLOHMANN_JSON_INCLUDE_BUILD_DIR})