[CMake] cmake - escape/delay variable expansion

[Ryan Pavlik]

I would think that this is exactly what the string configure command is for:
http://cmake.org/cmake/help/cmake-2-8-docs.html#command:string

Ryan

On 6/2/10 9:24 PM, Michael Hertling wrote:
> On 06/02/2010 10:24 PM, Doug Reiland wrote:
>    
>> Is there anyway to do in a generic fashion?
>> For example, I don't know what all the variables are.
>> I can be certain that they are valid, for example build-dir is set in scope.
>> However, the string can have several "variables" in it.
>>      
> The following function EXPAND() replaces all occurrences of "${...}" in
> INPUT with the current value of the appropriate variable and stores the
> result in OUTPUT:
>
> FUNCTION(EXPAND OUTPUT INPUT)
>      STRING(REGEX MATCH "\\\${[^}]*}" m "${INPUT}")
>      WHILE(m)
>          STRING(REGEX REPLACE "\\\${(.*)}" "\\1" v "${m}")
>          STRING(REPLACE "\${${v}}" "${${v}}" INPUT "${INPUT}")
>          STRING(REGEX MATCH "\\\${[^}]*}" m "${INPUT}")
>      ENDWHILE()
>      SET("${OUTPUT}" "${INPUT}" PARENT_SCOPE)
> ENDFUNCTION()
>
> So, e.g., set(foo \${build-dir}/foo.c) and expand(foo ${foo})
> with build-dir=/tmp/src yield foo=/tmp/src/foo.c as desired.
>
> Regards,
>
> Michael
>
>    
>> On Wed, Jun 2, 2010 at 3:06 PM, Michael Hertling<mhertling at online.de>  wrote:
>>      
>>> On 06/02/2010 08:37 PM, Doug Reiland wrote:
>>>        
>>>> Sorry for another newbie question.
>>>>
>>>> Say, to setup a variable as follow so ${build-dir} doesn't get expanded
>>>> set(foo \${build-dir}/foo.c)
>>>>
>>>> How would a expand foo so ${build-dir} gets expanded?
>>>>          
>>> STRING(REPLACE "\${build-dir}" "xyz" foo "${foo}")
>>>
>>> Regards,
>>>
>>> Michael
>>>        
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-- 
Ryan Pavlik
Human-Computer Interaction Graduate Student
Virtual Reality Applications Center
Iowa State University

rpavlik at iastate.edu
http://academic.cleardefinition.com/