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function(_EigenSource_import)
if(NOT DOWNLOAD_EIGEN)
set(EigenSource_FOUND FALSE PARENT_SCOPE)
return()
endif(NOT DOWNLOAD_EIGEN)
nncc_include(ExternalSourceTools)
nncc_include(OptionTools)
# NOTE The following URL comes from TensorFlow 1.7
envoption(EIGEN_URL https://bitbucket.org/eigen/eigen/get/2355b229ea4c.tar.gz)
ExternalSource_Download(EIGEN ${EIGEN_URL})
set(EigenSource_DIR ${EIGEN_SOURCE_DIR} PARENT_SCOPE)
set(EigenSource_FOUND TRUE PARENT_SCOPE)
endfunction(_EigenSource_import)
_EigenSource_import()
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