[CMake] How to get a variable that is defined in another CMakeLists.txt file

[David Cole]

DEFINED should be used with the variable name itself, not the value of the
variable:

IF(NOT DEFINED PROJECT_A_LIB_NAME)

Scratch the ${} and see what happens...


On 12/19/06, Mike Jackson <mike.jackson at imts.us> wrote:
>
> I have couple of projects, lets call them A and B. In project A I
> "SET" a variable as follows:
>
> SET (PROJECT_A_LIB_NAME MyLib)
>
> then use that further down A's cmake file in the ADD_LIBRARY() function.
>
> Now in Project B I would like to automagically be able to read the
> PROJECT_A_LIB_NAME variable. I have  added the "ADD_SUBDIRECTORY
> (PATH_TO_A BIN_DIR) to B's CMakeLists.txt file and then I tried just
> using the variable like usual ( ${PROJECT_A_LIB_NAME} )  but it is
> undefined.
>
> IF (NOT DEFINED ${PROJECT_A_LIB_NAME} )
>         MESSAGE (FATAL_ERROR "Ahh.. this is a problem")
> ENDIF (NOT DEFINED ${PROJECT_A_LIB_NAME} )
>
> So.. is there a way to get the variable value from one CMakeLists.txt
> file to another?
>
> Thanks for any help.
> --
> Mike Jackson   Senior Research Engineer
> Innovative Management & Technology Services
>
>
>
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