[ITK-dev] ITKv4.10rc2 - Why are there so many new CMake variable?

[Matt McCormick]

Hi,

I looked into this and I found two places that find_package(X11) are called.

The first one is in a netlib example, which could easily be disabled:

  https://github.com/InsightSoftwareConsortium/ITK/blob/2e04f1da5984be79ef1eb6c3ac6f3a905a0f709a/Modules/ThirdParty/VNL/src/vxl/v3p/netlib/examples/CMakeLists.txt#L7

The second, though, is in GDCM's OpenJPEG:

  https://github.com/InsightSoftwareConsortium/ITK/blob/2e04f1da5984be79ef1eb6c3ac6f3a905a0f709a/Modules/ThirdParty/GDCM/src/gdcm/Utilities/gdcmopenjpeg-v2/CMakeLists.txt#L76
  https://github.com/Kitware/CMake/blob/c75d91a05c9f442582726e3e80fec41d016da76f/Modules/CMakeBackwardCompatibilityC.cmake#L52

This would have to be changed to only perform the checks it needs.
The reduced try_compile checks could also reduce initial configuration
time.

Thanks,
Matt

On Fri, May 20, 2016 at 2:13 PM, Lowekamp, Bradley (NIH/NLM/LHC) [C]
<blowekamp at mail.nih.gov> wrote:
> I am now getting a whole bunch of X11 related CMake variables in the advanced configuration of CMake. These are very annoying and not useful. There also seems to be a bunch of other VXL related variables, that didn’t use to be there.
>
> Brad
>
>
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