[Paraview] Multiple Plugins Invoking common library target.

[Mike Jackson]

I have 2 separate plugins that I am trying to build into ParaView  
using the ParaView_Extra_External_modules variable. The problem that I  
am having is that both plugins call the same Common CMakeLists.txt  
file that builds a common library. CMake is complaining that all the  
targets have to be globally unique. I was hoping that CMake would see  
that the target has already been added and then ignore that  
CMakeLists.txt the 2 time it hit it. Is it possible to push up a  
variable to the parent scope or something to flag paraview that my  
common library has already been added as a target?
    I guess I could go looking in the ParaView_BINARY_DIR for the  
"MXADataModel" directory which I guess would be an indicator that it  
is already in the cmake cache and I can just use the library name  
directly?
  Anyone have any suggestions.

Mike Jackson