[CMake] Auto re-configuring until cache stops changing

[David Cole]

On Wed, Sep 8, 2010 at 3:43 AM, Diablo 666 <thediablo666 at hotmail.de> wrote:

>  Hi,
>
> > What I meant was that the curses and Qt UI's should behave more like
> 'cmake'.
>
> What does cmake actually do? The following code runs into an infinite loop
> on
> ccmake (like intended), but cmake seems to finish after the first pass (it
> just prints
> out "on" once), though there is a newly introduced cache variable on every
> run.
>
> SET (FOOBAR OFF CACHE BOOL "bla")
> IF (NOT FOOBAR)
>     SET (FOOBAR ON CACHE BOOL "bla" FORCE)
>     SET (BLA ON CACHE BOOL "foobar")
>     UNSET (FOO CACHE)
>     MESSAGE (STATUS "on")
> ELSE()
>     SET (FOOBAR OFF CACHE BOOL "bla" FORCE)
>     UNSET (BLA CACHE)
>     SET (FOO ON CACHE BOOL "barfoo")
>     MESSAGE (STATUS "off")
> ENDIF(NOT FOOBAR)
>
>
> Andreas
>
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"cmake" configures exactly once and generates at the end of that configure,
regardless of any "now new" options or settings.

If you run it again, it will do the same again, and in your case, you should
see the "off" message on the 2nd run.
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