[CMake] Restrictions on where a binary can be put?

[Nizar Khalifa Sallem]

At Sun, 09 Jan 2011 21:42:49 +0100,
Michael Hertling wrote:
> 
> On 01/09/2011 09:09 PM, Andreas Pakulat wrote:
> > On 09.01.11 21:05:21, Andreas Pakulat wrote:
> >> On 09.01.11 14:24:16, Michael Hertling wrote:
> >>> On 01/09/2011 12:58 PM, Andreas Pakulat wrote:
> >>>> Hi,
> >>>>
> >>>> I'm having a bit of a problem here changing the runtime output directory
> >>>> for a binary. Its an executable target named 'setup' and I'd like to put it
> >>>> into the top-level directory. Unfortunately it always ends up in the bin/
> >>>> directory, which is what CMAKE_RUNTIME_OUTPUT_DIRECTORY is being set to.
> >>>>
> >>>> I'm using
> >>>>     set_target_properties( setup PROPERTIES RUNTIME_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR} )
> >>>> after creating the target currently, which should work as far as I can see
> >>>> from the documentation. Are there maybe any restrictions on what the
> >>>> directory may be or what targets can be put there?
> >>>>
> >>>> If not, any suggestions how to debug this? I can see that the build.make
> >>>> does already have the rule setup for putting the binary into bin/, so it
> >>>> must be going wrong somewhere in the generation stage, but a simple cmake
> >>>> --trace doesn't show up anything suspicious. Is there a switch to follow
> >>>> the steps that cmake does during makefile-generation?
> >>>
> >>> Could you provide a minimal but complete example?
> >>
> >> Ok, attached case produces the error. Apparently the problem is fetching
> >> the LOCATION property from the target and setting the
> >> RUNTIME_OUTPUT_DIRECTORY afterwards. Looks like a cmake bug to me, so
> >> I'll file a report.
> > 
> > Ooops, forgot the attachment :)
> 
> Now, I can confirm the issue; indeed, the GET_TARGET_PROPERTY() on the
> LOCATION apparently renders the following SET_TARGET_PROPERTY() on the
> RUNTIME_OUTPUT_DIRECTORY ineffective. As I cannot see any reason for
> this, I'd agree that it should be considered as a bug. Besides, my
> example was pointless: A simple clash of an executable "main" with
> a subdirectory of the same name in CMAKE_BINARY_DIR, sorry. :/
> 
> Regards,
> 
> Michael
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I don't really understand why you want to get the LOCATION from your
target, anyway, the get_target_property works fine if you use
set_target_properties before it. I am not sure that the
CMAKE_RUNTIME_OUTPUT_DIRECTORY makes a property which is
"gettable". If you can better explain what do you want to do with the
LOCATION of your target may be someone can help.

Best,
Nizar