[CMake] Check if a target has been added

[Alexander Neundorf]

On Tuesday 08 July 2008, Félix C. Morency wrote:
> Hi,
>
> I posted a message yesterday and found out that the method wasn't quite
> effective. If there any way of checking if a target has already been added
> to the build chain (resetting it at each configure) ? I have lots of
> projects depending on the same target and this produces makefile warnings
> and VS. annoying popups.

You could try to get a target property, e.g. LOCATION from the target you are 
interested in, and see what you get. 
(this may behave differently in cmake 2.4 and 2.6)

Alex