[CMake] dependency in custom command?

[King, Steven R]

> You don't have to do the copying yourself. Just tell CMake in which
> directory it should create the module by either setting the
> LIBRARY_OUTPUT_DIRECTORY target property or the
> CMAKE_LIBRARY_OUTPUT_DIRECTORY variable.
> 
> AFAIK the LOCATION property is only present for compatibility with
> CMake 2.4, and shouldn't be used in new code.

Hi Mike -- I don't know from which directory my module test will run when using ctest.  So, my test program does not have an easy way to know the relative path to LIBRARY_OUTPUT_DIRECTORY when making the dlopen() call.  Allowing my test program to assume the dll is in its local directory seemed to be the easiest solution.