SET(SDK_HYDRA "" CACHE PATH "libSixense path for Razer Hydra")
if(SDK_HYDRA)
    include(opentrack-hier)
    opentrack_boilerplate(opentrack-tracker-hydra)
    target_include_directories(opentrack-tracker-hydra SYSTEM PUBLIC ${SDK_HYDRA}/include ${SDK_HYDRA}/include/sixense_utils)
    set(six4 "")
    if(WIN32)
        if(MSVC)
            set(dir lib)
            set(ext lib)
        else()
            set(dir bin)
            set(ext dll)
        endif()
        set(under_dll _dll)
        set(soext dll)
        target_link_libraries(opentrack-tracker-hydra "${SDK_HYDRA}/${dir}/win32/release_dll/sixense.${ext}")
        install(FILES "${SDK_HYDRA}/bin/win32/release_dll/sixense.dll" DESTINATION . ${opentrack-perms})
    else()
        if(APPLE)
            set(dest .)
            set(under-dll _dll)
            set(soext dylib)
            set(plat osx_x64)
        else()
            set(dest ${opentrack-hier-pfx})
            set(under-dll)
            set(soext so)
            set(plat linux)
            execute_process(COMMAND uname -m OUTPUT_VARIABLE architecture)
            string(REPLACE "\n" "" architecture ${architecture})
            if(architecture STREQUAL "x86_64")
                set(six4 _x64)
            else()
                set(six4)
            endif()
        endif()
        target_link_libraries(opentrack-tracker-hydra "${SDK_HYDRA}/lib/${plat}${six4}/release${under-dll}/libsixense${six4}.${soext}")
        install(FILES "${SDK_HYDRA}/lib/${plat}${six4}/release${under-dll}/libsixense${six4}.${soext}" DESTINATION libexec/opentrack ${opentrack-perms})
    endif()
endif()