[CMake] Some newbie questions

[Mike Jackson]

--  
Mike Jackson   Senior Research Engineer
Innovative Management & Technology Services


On Nov 3, 2007, at 9:36 AM, Thomas Sharpless wrote:

> Hello cmake
>
> I've just been introduced to cmake, and I LOVE it!  Congratulations  
> on a great idea, very well realized.
>
> I've undertaken to build weekly snapshots of Hugin for Windows, and  
> I need to be able maintain and extend the cmake scripts that  
> control the build. Most of what I need is already clearly  
> documented, but I do have a few questions about the basics that  
> don't seem to be.
>
> 1] How can a script delete variables, in particular from the cache?
>
> 2] What is the best way to get the pathname of the parent of a  
> directory whose pathname I already have?  Using the form $ 
> {have_path}/.. in the PATHS argument to FIND_PATH did not work,   
> the output variable got set to "<expanded_have_path>/.." which  
> though it is a correct reference on Windows and (I believe) Unix,  
> does not work in a FIND_FILE command.

GET_FILENAME_COMPONENT(OUTPUT_VARIABLE ${SOME_PATH_TO_FILE} PATH)


>
> 3] Does cmake run on a TCL interpreter, and if it does, can one  
> escape into a less restricted dialect of TCL and/or run TCL scripts  
> from a file?
>
> Thanks, Tom
>
>
>
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