[CMake] Re: Weird if nesting problem

[Brandon J. Van Every]

James Bigler wrote:
>
>
> If you look at the original code.  The PARSER_EXECUTABLE variable 
> isn't defined until inside the first ELSE branch.
>
> # You need at least version 2.4 for this to work.
> IF("${CMAKE_MAJOR_VERSION}.${CMAKE_MINOR_VERSION}" LESS 2.6)
>   MESSAGE("You need at least version 2.4 for generating stuff.  Go get 
> it from http://www.cmake.org/HTML/Download.html")
>   SET(PARSERS_FOUND 0)
>
> ELSE("${CMAKE_MAJOR_VERSION}.${CMAKE_MINOR_VERSION}" LESS 2.6)
>
>   FIND_PROGRAM(PARSER_EXECUTABLE
>     NAMES my_parser
>     PATHS ${PARSER_DIR} )
>
>   IF(EXISTS ${PARSER_EXECUTABLE})
>     SET(PARSERS_FOUND 1)
>   ELSE(EXISTS ${PARSER_EXECUTABLE})
>     SET(PARSERS_FOUND 0)
>   ENDIF(EXISTS ${PARSER_EXECUTABLE})
>
> ENDIF("${CMAKE_MAJOR_VERSION}.${CMAKE_MINOR_VERSION}" LESS 2.6)
>
> -----------------------------------------------------------
>
> PARSER_EXECUTABLE doesn't exist until I'm in the ELSE block.  
> IF(EXISTS ${PARSER_EXECUTABLE}) should *NEVER* get evaluated, but it 
> does.

Well, if you get rid of the first IF..ELSE, do things work?  i.e.

  FIND_PROGRAM(PARSER_EXECUTABLE
    NAMES my_parser
    PATHS ${PARSER_DIR} )

  IF(EXISTS ${PARSER_EXECUTABLE})
    SET(PARSERS_FOUND 1)
  ELSE(EXISTS ${PARSER_EXECUTABLE})
    SET(PARSERS_FOUND 0)
  ENDIF(EXISTS ${PARSER_EXECUTABLE})


And how about:

IF(TRUE)
  MESSAGE("Yeah it's true baby.")
ELSE(TRUE)
  FIND_PROGRAM(PARSER_EXECUTABLE
    NAMES my_parser
    PATHS ${PARSER_DIR} )

  IF(EXISTS ${PARSER_EXECUTABLE})
    SET(PARSERS_FOUND 1)
  ELSE(EXISTS ${PARSER_EXECUTABLE})
    SET(PARSERS_FOUND 0)
  ENDIF(EXISTS ${PARSER_EXECUTABLE})
ENDIF(TRUE)

You need to isolate where your problem occurs.  You've got slightly too 
much going on to be useful.


Cheers,
Brandon Van Every