[Cmake] using make clean

[David Svoboda]

Hello,

I have to following problem. I created a new custom command (as below) and
therefore a new set of *.hh files was created from *.idl files. These *.hh
files are used as header files in the next step. But I don't know, how to
delete these *.hh files with "make clean" command. Is there any reasonable
way?

   ADD_CUSTOM_COMMAND(
      OUTPUT ${CMAKE_CURRENT_SOURCE_DIR}/${FNAME}.hh
      DEPENDS ${IDL_FILE}
      COMMAND ${IDL_PROGRAM}
      ARGS -bcxx ${IDL_FILE}
      )


David