jsoncpp.cmake

if(NOT TARGET libjsoncpp)
    include(ExternalProject)
    ExternalProject_Add (
        jsoncpp
        URL  "https://github.com/open-source-parsers/jsoncpp/archive/1.8.4.zip"
        INSTALL_COMMAND ""
        CMAKE_ARGS 
            "-G${CMAKE_GENERATOR}"
            "-DCMAKE_CXX_FLAGS=${CMAKE_CXX_FLAGS} -fPIC"
            "-DCMAKE_BUILD_TYPE=${CMAKE_BUILD_TYPE}"
            "-DCMAKE_TOOLCHAIN_FILE=${CMAKE_TOOLCHAIN_FILE}"
            "-DJSONCPP_WITH_TESTS=OFF"
            "-DJSONCPP_WITH_POST_BUILD_UNITTEST=OFF"
            "-DJSONCPP_WITH_PKGCONFIG_SUPPORT=OFF"
    )   
    set_target_properties(jsoncpp  PROPERTIES POSITION_INDEPENDENT_CODE ON)
    
    if(MSVC)
        set(FILENAMELIB "Debug/jsoncpp.lib")
    else()
        set(FILENAMELIB "libjsoncpp.a")
    endif()
    
    # Create a libjsoncpp target to be used as a dependency by test programs
    add_library(libjsoncpp IMPORTED STATIC GLOBAL)
    
    ExternalProject_Get_Property(jsoncpp source_dir binary_dir)
    # Set libjsoncpp properties
    set_target_properties(libjsoncpp PROPERTIES
        "IMPORTED_LOCATION" "${binary_dir}/src/lib_json/${FILENAMELIB}")
    set(JSONCPP_INCLUDE "${source_dir}/include"
        CACHE INTERNAL "JSONCPP: Include Directories" FORCE)
    
endif()
        
include_directories(${JSONCPP_INCLUDE})
add_dependencies(${PROJECT_NAME} jsoncpp)
target_link_libraries(${PROJECT_NAME} libjsoncpp )