CMakeMacroFilterOut

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CAUTION: The contents of this page may be obsolete

NOTE: This macro is obsolete by built-in support in CMake for removing list elements with the LIST command:

 list(REMOVE_ITEM <list> <value> [<value> ...])
 
 SET(MYLIST this that and the other)
 # remove "this" and "that"
 LIST(REMOVE_ITEM MYLIST this)
 LIST(REMOVE_ITEM MYLIST that)

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    MACRO(FILTER_OUT FILTERS INPUTS OUTPUT)
        # Mimicks Gnu Make's $(filter-out) which removes elements 
        # from a list that match the pattern.
        # Arguments:
        #  FILTERS - list of patterns that need to be removed
        #  INPUTS  - list of inputs that will be worked on
        #  OUTPUT  - the filtered list to be returned
        # 
        # Example: 
        #  SET(MYLIST this that and the other)
        #  SET(FILTS this that)
        #
        #  FILTER_OUT("${FILTS}" "${MYLIST}" OUT)
        #  MESSAGE("OUTPUT = ${OUT}")
        #
        # The output - 
        #   OUTPUT = and;the;other
        #
        SET(FOUT "")
        FOREACH(INP ${INPUTS})
            SET(FILTERED 0)
            FOREACH(FILT ${FILTERS})
                IF(${FILTERED} EQUAL 0)
                    IF("${FILT}" STREQUAL "${INP}")
                        SET(FILTERED 1)
                    ENDIF("${FILT}" STREQUAL "${INP}")
                ENDIF(${FILTERED} EQUAL 0)
            ENDFOREACH(FILT ${FILTERS})
            IF(${FILTERED} EQUAL 0)
                SET(FOUT ${FOUT} ${INP})
            ENDIF(${FILTERED} EQUAL 0)
        ENDFOREACH(INP ${INPUTS})
        SET(${OUTPUT} ${FOUT})
    ENDMACRO(FILTER_OUT FILTERS INPUTS OUTPUT)

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