[vtkusers] VTK 7.1.1 iOS build

[Ken Martin]

The ios build of VTK starts at the top where it sets up subdirectories and
then recursively calls cmake on VTK for those subdirectories with specific
options. So the return at the top is correct. When the build process is
building the subdirectories it will process that same file with different
settings where it will get to those later if statements.

Also you can look at

https://open.cdash.org/viewNotes.php?buildid=4909344

which shows how the nightly dashboard is setup for iOS.


Hope that helps!
Ken

On Tue, May 23, 2017 at 3:38 PM, Brooksby, Glen W (GE Global Research, US) <
brooksby at ge.com> wrote:

> I’m attempting to build VTK (v7.1.1) for iOS and I’ve run into problems.
> In looking at the top level CMakeLists.txt file I see a stanza that says:
>
>
>
> option(VTK_IOS_BUILD "Build vtk.framework for iOS" OFF)
>
> if (VTK_IOS_BUILD)
>
>   include(vtkiOS)
>
>   return()
>
> endif()
>
>
>
> The only instructions I see for building VTK for iOS are here
> <https://blog.kitware.com/building-vtk-for-mobile-architectures/>. These
> instructions say to set VTK_IOS_BUILD=ON and a few other variables.
>
> However, if VTK_IOS_BUILD=ON, the stanza above causes CMake to “return”,
> or quit processing the top-level CMakeLists.txt file.  Yet further down in
> the same CMakeLists.txt file I see:
>
>
>
> if (ANDROID OR APPLE_IOS) …
>
>
>
> and
>
>
>
> if (APPLE_IOS)…
>
>
>
> These two conditionals seem to be targeting iOS, but will never be reached
> if VTK_IOS_BUILD=ON.  I see nowhere where APPLE_IOS is set, nor
> instructions to set it.
>
>
>
> For my case I changed the first stanza to:
>
>
>
> option(VTK_IOS_BUILD "Build vtk.framework for iOS" OFF)
>
> if (VTK_IOS_BUILD)
>
> include(vtkiOS)
>
> SET (APPLE_IOS 1)
>
>   #return()
>
> endif()
>
>
>
> Configure, generate, and the build seems to get much further, but the
> build still breaks when building for the simulator (in vtkGL2PSExporter.cxx
> because it’s not finding vtk_gl2ps.h).
>
>
>
> A framework is produced, but it appears to be incomplete.  Specifically,
> vtkInteractorStyleMultiTouchCamera.h is not included, which may be caused
> by APPLE_IOS being set.  Because of this the iOS example GLPaint cannot
> be built.
>
>
>
> Is there anyone who is having success building VTK 7.1.1 for iOS who can
> shed some light on this or provide more thorough instructions? Would a
> different version have more success?  A VTK Framework does appear to have
> been produced.
>
>
>
> For reference I’m building VTK 7.1.1, using CMake version 3.8.0.  I’m
> building on a Macbook air running MacOS 10.12.4 (Sierra), with Xcode 8.3.1.
>
>
>
> Thanks,
>
>
>
> Glen Brooksby
>
>
>
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-- 
Ken Martin PhD
Distinguished Engineer
Kitware Inc.
28 Corporate Drive
Clifton Park NY 12065

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