[CMake] Building a Version Header

[Johannes Stallkamp]

Am 09.07.2010 12:56, schrieb Michael Hertling:
> As the version target is always out of date it will be build each time
> you (re)build main, but since CONFIGURE_FILE() obviously does not touch
> the output file as long as it won't change, version.h isn't timestamped,
> so it doesn't trigger the rebuild of the main target.
Hey, that's great. I didn't know that CONFIGURE_FILE does not touch
the output file if the content doesn't change.
With that knowledge, I can now simplify my scripts which up to now
checked manually whether the version number changed and only called
CONFIGURE_FILE if this is the case.
Where did you find that? Did I miss it in the docs?

Thanks
Johannes


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