[Cmake] Issues and new ideas

[Bill Hoffman]

I was thinking more along these lines:

FIND_LIBRARY(LIB_PATH foobar)

IF(LIB_PATH)   - succeds if not (IGNORE or NOTFOUND, or empty)
   do something
ENDIF(LIB_PATH)



At 02:09 PM 5/10/2001 -0400, Amitha Perera wrote:
>> 2. A third state will be added as a possible cache value.
>> NOTFOUND, IGNORE, or VALUE.
>
>There'll need to be an corresponding extension to the IF command. I
>suggest the third state be called "UNSET" or something like that:
>  IF(HAS_LIB)        - succeeds if HAS_LIB is not "UNSET" and is not "NO" 
>                       ("NOTFOUND", "FALSE", "0" and other negatives)
>  IF(NOT HAS_LIB)    - not( above )
>  IF(SET HAS_LIB)    - succeeds if HAS_LIB is not "UNSET"
>  IF(NOTSET HAS_LIB) - for convenience
>
>Using the variable:
>
>IF(HAS_LIB)
>   do something with it
>ENDIF(HAS_LIB)
>
>In the FindLib module:
>
>IF(NOTSET HAS_LIB)
>  SET( HAS_LIB "NO" CACHE )
>  FIND_LIBRARY(LIB_PATH...)
>  IF(LIB_PATH)
>    SET( HAS_LIB "YES" CACHE )
>  ENDIF(LIB_PATH)
>ENDIF(NOTSET HAS_LIB)