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# find_package rejects version with commit number. Commit ID is appended to the package name
# as a workaround.
#
# TODO Find a better way
function(_import)
  if(NOT DOWNLOAD_EIGEN)
    set(EigenSource_FOUND FALSE PARENT_SCOPE)
    return()
  endif(NOT DOWNLOAD_EIGEN)

  nncc_include(ExternalSourceTools)
  nncc_include(OptionTools)

  # This URL originates from TensorFlow 1.12
	#
	# "tensorflow/workspace.bzl"
  envoption(EIGEN_fd6845384b86_URL https://bitbucket.org/eigen/eigen/get/fd6845384b86.tar.gz)

  ExternalSource_Download(EIGEN
    DIRNAME EIGEN-fd6845384b86
    CHECKSUM MD5=4c884968ede816a84c70e2cd2c81de8d
    ${EIGEN_fd6845384b86_URL}
  )

  set(EigenSource_DIR ${EIGEN_SOURCE_DIR} PARENT_SCOPE)
  set(EigenSource-fd6845384b86_FOUND TRUE PARENT_SCOPE)
endfunction(_import)

_import()