[Insight-developers] Is it Kosher to change ITK/Wrapping/WrapITK?

[Williams, Norman K]

As I understand it, WrapITK in ITK4 is more or less tracking the
independent WrapITK project headed by Gaetan Lehmann.

In order to automate downloading and building CableSwig using CMake's
ExternalProject module, a slight change needs to be made to allow for
building CableSwig as an external project.  Namely, something along the
lines of this:

if(NOT ITK_CABLESWIG_EXTERNALPROJECT)
  find_package(CableSwig REQUIRED)
endif(NOT ITK_CABLESWIG_EXTERNALPROJECT)


The other part of the setup is in ITK/Wrapping/itkWrapSetup.cmake -- based
on a new option ITK_CABLESWIG_EXTERNALPROJECT It either builds CableSwig
using ExternalProject, or uses the old method of either building source
downloaded to ITK/Utilities/CableSwig or finding it with find_package.

The problem is that at CMake configure time, the internally built
CableSwig has yet to be built.  Those programs aren't needed at configure
time, though, just their locations.