if(LEVEL_ZERO_FOUND)
    if(TARGET level_zero::ze_loader)
        message(STATUS "level-zero is found and TARGET level_zero::ze_loader is defined")
        return()
    endif(TARGET level_zero::ze_loader)

    # If the user defines LEVEL_ZERO_INCLUDE_DIR and LEVEL_ZERO_LIBRARY_DIR, CMake's find_package declares that LEVEL_ZERO_FOUND is 1, but does not define the target.
    check_library_exists("ze_loader" "zeInit" "${LEVEL_ZERO_LIBRARY_DIR}" LEVEL_ZERO_HAVE_ZE_LOADER)
    check_include_file("${LEVEL_ZERO_INCLUDE_DIR}/level_zero/ze_api.h" LEVEL_ZERO_HAVE_ZE_API_H)
    if(LEVEL_ZERO_HAVE_ZE_LOADER AND LEVEL_ZERO_HAVE_ZE_API_H)
        message(STATUS "Defining level_zero::ze_loader target with interface ${LEVEL_ZERO_INCLUDE_DIR}/level_zero/ze_api.h and library ${LEVEL_ZERO_LIBRARY_DIR}/libze_loader.so")
        add_library(level_zero::ze_loader UNKNOWN IMPORTED GLOBAL)
        set_property(TARGET level_zero::ze_loader PROPERTY IMPORTED_LOCATION "${LEVEL_ZERO_LIBRARY_DIR}/libze_loader.so")
        set_property(TARGET level_zero::ze_loader PROPERTY INTERFACE "${LEVEL_ZERO_INCLUDE_DIR}/level_zero/ze_api.h")
        include_directories("${LEVEL_ZERO_INCLUDE_DIR}/") 
        return()
    else(LEVEL_ZERO_HAVE_ZE_LOADER AND LEVEL_ZERO_HAVE_ZE_API_H)
        if(NOT LEVEL_ZERO_HAVE_ZE_LOADER)
            message(STATUS "LEVEL_ZERO_FOUND is set, but could not find ze_loader library in ${LEVEL_ZERO_LIBRARY_DIR}")
        endif(NOT LEVEL_ZERO_HAVE_ZE_LOADER)
        if(NOT LEVEL_ZERO_HAVE_ZE_API_H)
            message(STATUS "LEVEL_ZERO_FOUND is set, but could not find level_zero/ze_api.h in ${LEVEL_ZERO_INCLUDE_DIR}")
        endif(NOT LEVEL_ZERO_HAVE_ZE_API_H)
    endif(LEVEL_ZERO_HAVE_ZE_LOADER AND LEVEL_ZERO_HAVE_ZE_API_H)
endif(LEVEL_ZERO_FOUND)

if(LEVEL_ZERO_ROOT_DIR)
    message(STATUS "Trying to locate level-zero library and headers under ${LEVEL_ZERO_ROOT_DIR}")
    find_library(ZE_LOADER_LIBRARY "ze_loader" HINTS "${LEVEL_ZERO_ROOT_DIR}/lib" "${LEVEL_ZERO_ROOT_DIR}/lib64" NO_DEFAULT_PATH)
    find_path (LEVEL_ZERO_INCLUDE_DIR NAMES "level_zero/ze_api.h" PATHS "${LEVEL_ZERO_ROOT_DIR}/include" NO_DEFAULT_PATH)

    if(ZE_LOADER_LIBRARY AND LEVEL_ZERO_INCLUDE_DIR)
	    get_filename_component(ZE_LOADER_LIBRARY_DIR ${ZE_LOADER_LIBRARY} DIRECTORY)
	    check_library_exists("ze_loader" "zeInit" ${ZE_LOADER_LIBRARY_DIR} ZE_LOADER_HAVE_ZEINIT)

        if(ZE_LOADER_HAVE_ZEINIT)
            message(STATUS "Found ze_loader library in ${ZE_LOADER_LIBRARY} and level_zero/ze_api.h in ${LEVEL_ZERO_INCLUDE_DIR}")
            add_library(level_zero::ze_loader UNKNOWN IMPORTED GLOBAL)
            set_property(TARGET level_zero::ze_loader PROPERTY IMPORTED_LOCATION "${ZE_LOADER_LIBRARY}")
            set_property(TARGET level_zero::ze_loader PROPERTY INTERFACE "${LEVEL_ZERO_INCLUDE_DIR}/level_zero/ze_api.h")
            include_directories("${LEVEL_ZERO_INCLUDE_DIR}/") 
            set(LEVEL_ZERO_FOUND TRUE)
        else(ZE_LOADER_HAVE_ZEINIT)
            if(NOT ZE_LOADER_HAVE_ZEINIT)
                message(WARNING "Found ze_loader library under ${ZE_LOADER_LIBRARY}, but could not find symbol zeInit in this library -- falling back to package config search")
            endif(NOT ZE_LOADER_HAVE_ZEINIT)
        endif(ZE_LOADER_HAVE_ZEINIT)
    else(ZE_LOADER_LIBRARY AND LEVEL_ZERO_INCLUDE_DIR)
	    if(NOT ZE_LOADER_LIBRARY)
		    message(WARNING "Could not find ze_loader library under provided LEVEL_ZERO_ROOT_DIR='${LEVEL_ZERO_ROOT_DIR}' (tried subdirectories lib/ and lib64/) -- falling back to package config search")
	    endif(NOT ZE_LOADER_LIBRARY)
	    if(NOT LEVEL_ZERO_INCLUDE_DIR)
		    message(WARNING "Cound not find level_zero/ze_api.h under provided LEVEL_ZERO_ROOT_DIR=${LEVEL_ZERO_ROOT_DIR}' (tried subdirectory include) -- falling back to package config search")
	    endif(NOT LEVEL_ZERO_INCLUDE_DIR)
    endif(ZE_LOADER_LIBRARY AND LEVEL_ZERO_INCLUDE_DIR)
endif(LEVEL_ZERO_ROOT_DIR)

if(NOT LEVEL_ZERO_FOUND)
    find_package(PkgConfig QUIET)

    if(PKG_CONFIG_FOUND)
        pkg_check_modules(LEVEL_ZERO level-zero)
        if(LEVEL_ZERO_FOUND)
            pkg_get_variable(LEVEL_ZERO_LIBRARY_DIR level-zero libdir)
            pkg_get_variable(LEVEL_ZERO_INCLUDE_DIR level-zero includedir)
            #We double-check that the level-zero library is indeed where find_package claims it is
            find_library(_PARSEC_ZE_LOADER_LIBRARY_FOUND ze_loader PATHS "${LEVEL_ZERO_LIBRARY_DIR}/libze_loader.so" 
                         NO_DEFAULT_PATH NO_PACKAGE_ROOT_PATH NO_CMAKE_PATH NO_CMAKE_ENVIRONMENT_PATH NO_SYSTEM_ENVIRONMENT_PATH NO_CMAKE_SYSTEM_PATH NO_CMAKE_INSTALL_PREFIX)
            if( _PARSEC_ZE_LOADER_LIBRARY_FOUND )
                add_library(level_zero::ze_loader UNKNOWN IMPORTED GLOBAL)
                set_property(TARGET level_zero::ze_loader PROPERTY IMPORTED_LOCATION "${LEVEL_ZERO_LIBRARY_DIR}/libze_loader.so")
                set_property(TARGET level_zero::ze_loader PROPERTY INTERFACE "${LEVEL_ZERO_INCLUDE_DIR}/level_zero/ze_api.h")
                include_directories("${LEVEL_ZERO_INCLUDE_DIR}/")
            else()
                message(WARNING "level-zero was found in `${LEVEL_ZERO_LIBRARY_DIR}` and `${LEVEL_ZERO_INCLUDE_DIR}` according to pkg-config, but ze_loader library is not in `${LEVEL_ZERO_LIBRARY_DIR}/libze_loader.so`. Deactivating level-zero. Provide -DLEVEL_ZERO_ROOT_DIR to specify the location of level zero manually.")
                set(LEVEL_ZERO_FOUND OFF CACHE BOOL "if level-zero was found" FORCE)
            endif()
        endif(LEVEL_ZERO_FOUND)
    endif(PKG_CONFIG_FOUND)
endif(NOT LEVEL_ZERO_FOUND)