[CMake] FUNCTION doesn't changes parent variables

[David Cole]

> Why MYTEST function doesn't changes the parent variable MYMSG?
> Do I need to FORCE it?

No, you need to PARENT_SCOPE it. See cmake --help-command SET for details
about PARENT_SCOPE.

HTH,
David

On Wed, Apr 23, 2008 at 11:29 AM, Alejandro Morell Garcia <
alejandro.morell at gmail.com> wrote:

>  Hello, I'm testing the new FUNCTION command. In documentation says it's
> the same as a MACRO but local variables are deleted at exit.
> Because of this, I want to port all my macros to functions, but it doesn't
> changes parent variables. Check the following example:
>
> FUNCTION(MYTEST VAR1 VAR2 OUTPUTVAR)
>     MESSAGE(STATUS "OUTPUTVAR = ${OUTPUTVAR}")
>     SET(${OUTPUTVAR} "Values var1 = ${VAR1} var2 = ${VAR2}")
>     MESSAGE(STATUS "${OUTPUTVAR}: ${${OUTPUTVAR}}")
> ENDFUNCTION(MYTEST)
>
> MESSAGE(STATUS "Test functions")
>
> MYTEST("Hello" "World" MYMSG)
> MESSAGE(STATUS ${MYMSG})
>
> MYTEST("1" "2" MYMSG)
> MESSAGE(STATUS ${MYMSG})
>
> MYTEST("3" "4" MYMSG)
> MESSAGE(STATUS ${MYMSG})
>
> The output of executing this (with "cmake -P MyTest.cmake") it's the
> following:
> -- Test functions
> -- OUTPUTVAR = MYMSG
> -- MYMSG: Values var1 = Hello var2 = World
> --
> -- OUTPUTVAR = MYMSG
> -- MYMSG: Values var1 = 1 var2 = 2
> --
> -- OUTPUTVAR = MYMSG
> -- MYMSG: Values var1 = 3 var2 = 4
> --
>
> Why MYTEST function doesn't changes the parent variable MYMSG?
> Do I need to FORCE it?
>
> Thanks.
>
> (Sorry for my english :P)
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