[CMake] How Do I make a Custom Rule.

[Peter Kahn]

What is the right pattern to use in cmake to create a custom rule for
converting a bunch of files?


    In make I can define a custome rule for file types.
    What is the right way to do this in cmake?

I can create a macro, but I'm unsure how to properly connect it to a
target.  I can't seem to put it in a custom target.

Example:  automake:
.xml.h:
    cat base.xml $< > $.hprep
    transmogrify $*.hprep

My Cmake (which doesn't work)
MACRO(GENERATE_H XMLFILES)
  SET(BASE_PATH ${CMAKE_CURRENT_SOURCE_DIR}/base.xml)
  FOREACH(FILE ${XMLFILES})
    # File name without the extension
    GET_FILENAME_COMPONENT(TMP_FILENAME ${FILE} NAME_WE)

    # the input file might be full path, so handle that
    GET_FILENAME_COMPONENT(TMP_FILENAME ${FILE} PATH)

    # determine input filename
    IF (TMP_FILEPATH)
      SET(TMP_PATH ${TMP_FILEPATH}/${TMP_FILENAME}.xml)
    ELSE(TMP_FILEPATH)
      SET(TMP_PATH  ${CONNECTED_SOURCE_DIR}/${TMP_FILENAME}.xml)
    ENDIF(TMP_FILEPATH)

    # Build the mch file
    ADD_CUSTOM_COMMAND(
      OUTPUT    ${TMP_ PATH}
      DEPENDS   ${MCH_HEADER}
      COMMAND   cat
      ARGS      ${BASE_PATH} ${FILE}
    )

    # Convert
    ADD_CUSTOM_COMMAND(
      OUTPUT    tmpFile
      COMMAND   transmogrify
      ARGS     ${TMP_MCFILE}
    )
  ENDFOREACH(FILE)
ENDMACRO(GENERATE_H)





-- 
Peter Kahn
citizenkahn at gmail.com
citizenkahn at jabber80.com, pkahnpie1 at AIM, skype: citizenkahn
http://analogoustendencies.blogspot.com/
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