[Ctk-developers] Coming changes in External project organization

[Sascha Zelzer]

Hi Jc,

we use a similar structure for external projects in MITK, so +1 from me. 
I would only suggest a slight modification:

Can we use

<CTK-SUPERBUILD>/VTK-src
<CTK-SUPERBUILD>/VTK-tmp

instead of

<CTK-SUPERBUILD>/VTK-cmake/src
<CTK-SUPERBUILD>/VTK-cmake/tmp

?

Thanks for taking care of this,

Sascha

On 04/11/2011 06:21 PM, Jean-Christophe Fillion-Robin wrote:
> Hi Folks,
>
> Using CTK as an external project in more and more project, the path 
> length could be an issue on windows platform.
> Indeed, the path length on windows is limited to 260 characters. [1]
>
> *What motivates this change:*
>
> Such problem could arise, if, for example, your project is build in 
> folder like:
>
> "c:/Dashboards/Nightly/YourProject-Superbuild-Qt-PythonQt-With-Tcl-NoCLI-nightly" 
>
>
> "YourProject" relying also on Superbuild and using CTK as an external 
> project .. will fail to build for some obscure reason.
>
>
> *Current CTK organization:*
>
> Currently the project are organized as described below:
>
> <CTK-SUPERBUILD>/CMakeExternals/Build/VTK
> <CTK-SUPERBUILD>/CMakeExternals/Build/DCMTK
> ...
> <CTK-SUPERBUILD>/CMakeExternals/Source/VTK
> <CTK-SUPERBUILD>/CMakeExternals/Source/DCMTK
> ...
> <CTK-SUPERBUILD>/CMakeExternals/Download/VTK
> <CTK-SUPERBUILD>/CMakeExternals/Download/DCMTK
> ...
> <CTK-SUPERBUILD>/CMakeExternals/Stamp/VTK
> <CTK-SUPERBUILD>/CMakeExternals/Stamp/DCMTK
> ...
> <CTK-SUPERBUILD>/CTK-build
>
>
> *Solution proposed:*
>
> With some minor changes, the structure would like:
>
> <CTK-SUPERBUILD>/CTK-build
> <CTK-SUPERBUILD>/VTK
> <CTK-SUPERBUILD>/VTK-build
> <CTK-SUPERBUILD>/VTK-cmake/src
> <CTK-SUPERBUILD>/VTK-cmake/tmp
> <CTK-SUPERBUILD>/VTK
> <CTK-SUPERBUILD>/DCMTK-build
> <CTK-SUPERBUILD>/DCMTK-cmake/src
> <CTK-SUPERBUILD>/DCMTK-cmake/tmp
>
> Pros:
>   - Doing so will decrease the average length of external project path 
> associated with CTK.
>   - If needed, make the "cleaning" of external project easier "rm 
> VTK*" instead of "cd" in each CMakeExternals sub folders ..
>
> *Action plan:*
>
> I plan to implement and test this change this coming week.
>
> That improvment shouldn't cause any issue, but If it happens to be a 
> problem within your project and you require some time to figure out a 
> fix or would like to contact me. Please, do it before the end of the 
> week :)
>
> Next week, following your comments I will then integrate the change to 
> CTK master.
>
> Thanks
> Jc
>
> [1] 
> http://msdn.microsoft.com/en-us/library/aa365247%28VS.85%29.aspx#maxpath
>
> -- 
> +1 919 869 8849
>

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