[Insight-developers] ITK/CMake q: Can I make a module depend on an ExternalProject target?

[Brad King]

On 05/30/2012 03:13 PM, Williams, Norman K wrote:
> That would be OK if we were to always require and ExternalDCMTK.  It won't
> work if we want to optionally use ExternalProject to build DCMTK.  You can
> build an ExternalProject to pull in a library, if there's nothing that
> needs to be built before CMake configuration?

If the suggestion I made elsewhere in this thread doesn't work out,
you can at least include itkExternal_DCMTK.cmake from
Modules/IO/DCMTK/itk-module-init.cmake instead of modifying the
top-level CMakeLists.txt to include it.

To answer the original question, you need

  if(TARGET dcmtk)
    add_dependencies(ITKIODCMTK dcmtk)
  endif()

in Modules/IO/DCMTK/src/CMakeLists.txt to make sure the external
project builds before the library that needs it.

-Brad

> On 5/30/12 12:51 PM, "Bill Lorensen" <bill.lorensen at gmail.com> wrote:
> 
>> Look in
>> Modules/Bridge/VtkGlue/itk-module-init.cmake
>>
>>
>> On Wed, May 30, 2012 at 1:46 PM, Williams, Norman K
>> <norman-k-williams at uiowa.edu> wrote:
>>> So I've posted a gerrit topic on the work I've done to integrate
>>> DCMTKImageIO: http://review.source.kitware.com/#/c/5989/
>>>
>>> The question I have is that DCMTK needs to be built before compiling
>>> ITK/Modules/IO/DCMTK.  Is there some way to make the module depend on
>>> the
>>> DCMTK external project, something like the way the inter-module
>>> dependencies work?
>>> --
>>> Kent Williams norman-k-williams at uiowa.edu
>>>
>>>
>>>
>>>
>>>
>>>
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>> Unpaid intern in BillsBasement at noware dot com
> 
> 
> 
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