[CMake] Using cache in -P scripts?

[Abe Stephens]

Hi, Thanks for the reply. But perhaps I should clarify--I'd like to  
avoid using lots and lots of -D arguments. So instead of doing  
something like this:

add_custom_command(
   output file1.cc
   command ${CMAKE_COMMAND}
   args -D var0="${cached0}"
        -D var1="${cached1}"
        ...
        -D var127="${cached127}"
        -P myscript.cmake
   )

It would be great if there was a simple way to just load the cache  
within myscript.cmake. I think it would be possible to write a macro  
to read in the cache file and parse it, but I'm curious if there is an  
existing mechanism.

--Thanks
Abe

On Oct 23, 2008, at 2:19 AM, Mathieu Malaterre wrote:

> On Thu, Oct 23, 2008 at 5:53 AM, Abe Stephens <abe at sci.utah.edu>  
> wrote:
>> Hi, Is it possible for a script executed during build (via custom  
>> command of
>> cmake -P) to load and read values from the project's CMakeCache.txt  
>> file? I
>> tried using load_cache in the script, but apparently that isn't  
>> allowed.
>>
>
> You are looking for "-D", warning it needs to be passed *before* -P
>
>       -P <file>
>              Process script mode.
>
>              Process the given cmake file as a script written  in   
> the  CMake
>              language.   No  configure  or generate step is  
> performed and the
>              cache is not modified. If variables are defined using  - 
> D,  this
>              must be done before the -P argument.
>
> 2cts
> -- 
> Mathieu