[CMake] process file contents

[James C. Sutherland]

I would like to execute a command like:
	getrates -n < myFileName

I am trying to add this so it is processed after the target "getrates" is built

set( infile ${CMAKE_CURRENT_BINARY_DIR}/myFileName )
add_custom_command( TARGET getrates
  POST_BUILD
  COMMAND "${CMAKE_CURRENT_BINARY_DIR}/getrates" " -n < ${infile}"
  WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}
  VERBATIM
  )

This does not seem to work, however.  CMake doesn't handle the "<" properly.  Any ideas about how to stream the contents of a file?

Thanks,

James
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