function(download_onnxruntime)
  if(CMAKE_VERSION VERSION_LESS 3.11)
    # FetchContent is available since 3.11,
    # we've copied it to ${CMAKE_SOURCE_DIR}/cmake/Modules
    # so that it can be used in lower CMake versions.
    message(STATUS "Use FetchContent provided by sherpa-onnx")
    list(APPEND CMAKE_MODULE_PATH ${CMAKE_SOURCE_DIR}/cmake/Modules)
  endif()

  include(FetchContent)

  if(UNIX AND NOT APPLE)
    # set(onnxruntime_URL  "http://github.com/microsoft/onnxruntime/releases/download/v1.12.1/onnxruntime-linux-x64-1.12.1.tgz")

    # If you don't have access to the internet, you can first download onnxruntime to some directory, and the use
    # set(onnxruntime_URL  "file:///ceph-fj/fangjun/open-source/sherpa-onnx/onnxruntime-linux-x64-1.12.1.tgz")

    set(onnxruntime_HASH "SHA256=8f6eb9e2da9cf74e7905bf3fc687ef52e34cc566af7af2f92dafe5a5d106aa3d")
    # After downloading, it contains:
    #  ./lib/libonnxruntime.so.1.12.1
    #  ./lib/libonnxruntime.so, which is a symlink to lib/libonnxruntime.so.1.12.1
    #
    # ./include
    #    It contains all the needed header files
  else()
    message(FATAL_ERROR "Only support Linux at present. Will support other OSes later")
  endif()

  FetchContent_Declare(onnxruntime
    URL               ${onnxruntime_URL}
    URL_HASH          ${onnxruntime_HASH}
  )

  FetchContent_GetProperties(onnxruntime)
  if(NOT onnxruntime_POPULATED)
    message(STATUS "Downloading onnxruntime ${onnxruntime_URL}")
    FetchContent_Populate(onnxruntime)
  endif()
  message(STATUS "onnxruntime is downloaded to ${onnxruntime_SOURCE_DIR}")

  find_library(location_onnxruntime onnxruntime
    PATHS
    "${onnxruntime_SOURCE_DIR}/lib"
  )

  message(STATUS "location_onnxruntime: ${location_onnxruntime}")

  add_library(onnxruntime SHARED IMPORTED)
  set_target_properties(onnxruntime PROPERTIES
    IMPORTED_LOCATION ${location_onnxruntime}
    INTERFACE_INCLUDE_DIRECTORIES "${onnxruntime_SOURCE_DIR}/include"
  )
endfunction()

download_onnxruntime()