[CMake] Post-Build commands on custom targets are always executed?

[Oliver Buchtala]

Am 15.04.2011 23:48, schrieb Michael Hertling:
> On 04/15/2011 11:22 PM, Oliver Buchtala wrote:
>> Hi,
>>
>> I observe that a custom command attached to a custom target as
>> POST-BUILD is launched on every build.
>> Is that true? or is it a misconfiguration on my side?
>>
>> Bye,
>> Oliver
> A custom target is always out of date, i.e. it is always rebuilt when
> it is visited - as a prerequisite of another target or due to the ALL
> clause, e.g., and since the target has been rebuilt, each associated
> POST_BUILD custom command is rerun. Thus, the behaviour you observed
> is correct, expected and reasonable, IMO.
>
> Regards,
>
> Michael
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Yep. That's reasonable.

Do have a suggestion how to get around a rerun of the post-build?
Or how would you do a post-build after custom-target without being run
when custom-target actually did nothing,
i.e., custom target depends on custom command that did nothing?

Bye,
Oliver