[CMake] Question regarding External Project add and VTK

Jean-Christophe Fillion-Robin jchris.fillionr at kitware.com
Tue Jun 3 01:16:10 EDT 2014


Hi Jameson,

To specifically address the issue you described, I started to develop an
(experimental) module extending ExternalProject and providing some
convenience function.

Documentation is far from being perfect but looking at

  (1) the tests: https://github.com/commontk/Artichoke/tree/master/Tests
  (2) the "to be extended/improved" documentation:
http://cmake-artichoke.readthedocs.org/en/latest/
  (3) example of usage in 3DSlicer: https://github.com/Slicer/Slicer

... you should be able to get the idea.


It basically provide to convenience function:

  make_as_superbuild

  ExternalProject_Include_Dependencies

allowing to

    automatically generate the value to pass to either CMAKE_CACHE_ARGS
(or CMAKE_ARGS if needed)



Ultimately, if the module API stabilizes and turns out to be of general
use, it could be integrate into CMake ...

Hth
Jc



On Mon, Jun 2, 2014 at 9:00 PM, jmerkow <jmerkow at gmail.com> wrote:

> I see, that makes a lot of sense.   And in order to pass options from the
> 'superbuild' build to the 'normal' build you make them options as command
> line args in your ExternalProhect_Add command?  i.e.:
>
> set( proj my_prog )
>   ExternalProject_Add( ${proj}
>     DOWNLOAD_COMMAND ""
>     SOURCE_DIR "${${proj}_Source_Dir}"
>     BINARY_DIR "${${proj}_Binary_Dir}"
>     CMAKE_GENERATOR ${gen}
>     CMAKE_ARGS
>         -D${proj}_option1:BOOL=${proj}_option1
>         -D${proj}_some_LIBRARY:FILEPATH=${proj}_some_LIBRARY
>         ...
>     INSTALL_DIR ${proj}/path/
>     DEPENDSsd
>         ${proj_DEPENDS})
>
> Is there an easier way to pass all the options to the 'normal' build?
>
> -Jameson
>
>
>
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