[vtkusers] compilation of VTK6.1 with Qt5-enabled - Policy CMP0040 is not set....

[David E DeMarle]

I think the means that that there is a new behavior in cmake 3.0.2 which
the older vtk 6.2 release code isn't entirely happy with.

Besides Gib's point, adding a line like the following to the top level
CMakeLists.txt should address the warning.

if(POLICY CMP0040)
  cmake_policy(SET CMP0040 OLD)
endif()

Updating the CMake script inside VTK's hdf5 to have an existing target is a
better fix.


David E DeMarle
Kitware, Inc.
R&D Engineer
21 Corporate Drive
Clifton Park, NY 12065-8662
Phone: 518-881-4909

On Sat, Nov 1, 2014 at 2:15 AM, Gib Bogle <g.bogle at auckland.ac.nz> wrote:

>  They look to me like warnings, not errors.  Is the build successful?
>
> Gib
>  ------------------------------
> *From:* vtkusers [vtkusers-bounces at vtk.org] on behalf of Sam Raby [
> rabysam28 at gmail.com]
> *Sent:* Saturday, 1 November 2014 6:32 p.m.
> *To:* vtkusers at vtk.org
> *Subject:* [vtkusers] compilation of VTK6.1 with Qt5-enabled - Policy
> CMP0040 is not set....
>
>   I am compiling VTK 6.1 from [1] with Qt enabled (Qt 5.3.2 from [2])
> using cmake 3.0.2 from [3]. My OS is Ubuntu 12.04.
>
>  I am running the following command [4] for ccmake:
>
> cd /path/to/VTK-Release-build
> ccmake -DVTK_QT_VERSION:STRING=5 \
>       -DQT_QMAKE_EXECUTABLE:PATH=/path/to/qt5.2.1-install/5.2.1/gcc_64/bin/qmake \
>       -DVTK_Group_Qt:BOOL=ON \
>       -DCMAKE_PREFIX_PATH:PATH=/path/to/qt.5.2.1-install/5.2.1/gcc_64/lib/cmake  \
>       -DBUILD_SHARED_LIBS:BOOL=ON
>       /path/to/VTK
>
>
>  but I'm getting the following error:
>
>  *(ADD_CUSTOM_COMMAND):*
>  *Policy CMP0040 is not set: The target in the TARGET signature of*
> *add_custom_command() must exist.  Run "cmake --help-policy CMP0040" for **policy
> details.  Use the cmake_policy command to set the policy and*
> *suppress this warning.*
>
>  *The target name*
>
> *"/home/torabi/local2/VTK/VTK-6.1.0-build/ThirdParty/hdf5/vtkhdf5/H5Edefin.h"*
>  *is unknown in this context.*
> *This warning is for project developers.  Use -Wno-dev to suppress it.*
>
>  Would you please hint me how to tackle this error?
>
>  Thanks
> -S
>
> [1] http://www.vtk.org/files/release/6.1/VTK-6.1.0.tar.gz
> [2]
> http://download.qt-project.org/official_releases/online_installers/qt-opensource-linux-x64-1.6.0-5-online.run
> [3] http://www.cmake.org/files/v3.0/cmake-3.0.2.tar.gz
>  [4] http://www.vtk.org/Wiki/VTK/Building/Linux#Qt5
>
>
>
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