[ITK] [ITK-dev] [slicer-devel] build error in simpleitk

Johnson, Hans J hans-johnson at uiowa.edu
Wed Jan 13 20:16:42 EST 2016 

I’m making a patch for this.

I’ve noticed this today as well.

mkdir XX;
cd XX;
cmake -DCMAKE_CXX_STANDARD:STRING=11 ../ITK;
make –j23

Before this patch, there was a build failure.
After this patch it is now building.

I made modifications to more closely match upstream VXL.

Gerrit- review at :  http://review.source.kitware.com/#/c/20658/

Hans

From: Insight-developers <insight-developers-bounces at itk.org<mailto:insight-developers-bounces at itk.org>> on behalf of Bradley Lowekamp <brad at lowekamp.net<mailto:brad at lowekamp.net>>
Date: Wednesday, January 13, 2016 at 6:38 PM
To: Isaiah Norton <isaiah.norton at gmail.com<mailto:isaiah.norton at gmail.com>>
Cc: SPL Slicer Devel <slicer-devel at bwh.harvard.edu<mailto:slicer-devel at bwh.harvard.edu>>, Insight Developers <insight-developers at itk.org<mailto:insight-developers at itk.org>>
Subject: Re: [ITK-dev] [slicer-devel] build error in simpleitk

Hello,

The patch looks pretty good. Thank you for contributing.

Can you please submit the patch to ITK Gerrit for review?

http://www.itk.org/Wiki/ITK/Git/Develop

Thanks
Brad

On Jan 13, 2016, at 6:47 PM, Isaiah Norton <isaiah.norton at gmail.com<mailto:isaiah.norton at gmail.com>> wrote:

(cc: insight-devel)

We are also seeing this issue, and several SimpleITK dashboards are failing with the same error for the OS X 10.9 (since bumping to ITK 4.9) and 10.10 (since yesterday) dashboards:
https://open.cdash.org/buildSummary.php?buildid=4188623

It looks like this is essentially caused by SimpleITK being compiled with `-std=c++11`, whereas ITK (and VXL) are not. So, there is a mismatch between the configured definition of `VCL_CONSTEXPR` and the `VCL_STATIC_CONST_INIT_*` macros.

For reference, VCL_CONSTEXPR was introduced here:
http://review.source.kitware.com/#/c/20386/

A proposed patch [1] is attached.

Best,
Isaiah

[1] https://github.com/ihnorton/ITK/commit/0f748d8c86ffb2369c3a343c0db5ca87b067843e



On Mon, Jan 11, 2016 at 11:21 AM, Steve Pieper <pieper at isomics.com<mailto:pieper at isomics.com>> wrote:

Hi -

This morning with Xcode 7.2 on mac 10.11.2 I get the build errors pasted below.  This was in a fresh build directory.  With SimpleITK turned off the build completes and everything works as expected.

I found an old issue with similar errors [1] but nothing lately.

-Steve

[1] https://issues.itk.org/jira/browse/ITK-2976




In file included from /Users/pieper/slicer4/latest/Slicer-superbuild/ITKv4/Modules/ThirdParty/VNL/src/vxl/core/vnl/vnl_c_vector.h:26:

/Users/pieper/slicer4/latest/Slicer-superbuild/ITKv4/Modules/ThirdParty/VNL/src/vxl/core/vnl/vnl_numeric_traits.h:388:41: error: declaration of constexpr static data member

      'zero' requires an initializer

  static VNL_EXPORT VCL_CONSTEXPR float zero VCL_STATIC_CONST_INIT_FLOAT_DECL(0.0F);

                                        ^

/Users/pieper/slicer4/latest/Slicer-superbuild/ITKv4/Modules/ThirdParty/VNL/src/vxl/core/vnl/vnl_numeric_traits.h:390:41: error: declaration of constexpr static data member

      'one' requires an initializer

  static VNL_EXPORT VCL_CONSTEXPR float one VCL_STATIC_CONST_INIT_FLOAT_DECL(1.0F);

                                        ^

/Users/pieper/slicer4/latest/Slicer-superbuild/ITKv4/Modules/ThirdParty/VNL/src/vxl/core/vnl/vnl_numeric_traits.h:392:41: error: declaration of constexpr static data member

      'maxval' requires an initializer

  static VNL_EXPORT VCL_CONSTEXPR float maxval VCL_STATIC_CONST_INIT_FLOAT_DECL(3.40282346638528860e+38F);

                                        ^

/Users/pieper/slicer4/latest/Slicer-superbuild/ITKv4/Modules/ThirdParty/VNL/src/vxl/core/vnl/vnl_numeric_traits.h:411:42: error: declaration of constexpr static data member

      'zero' requires an initializer

  static VNL_EXPORT VCL_CONSTEXPR double zero VCL_STATIC_CONST_INIT_FLOAT_DECL(0.0);

                                         ^

/Users/pieper/slicer4/latest/Slicer-superbuild/ITKv4/Modules/ThirdParty/VNL/src/vxl/core/vnl/vnl_numeric_traits.h:413:42: error: declaration of constexpr static data member

      'one' requires an initializer

  static VNL_EXPORT VCL_CONSTEXPR double one VCL_STATIC_CONST_INIT_FLOAT_DECL(1.0);

                                         ^

/Users/pieper/slicer4/latest/Slicer-superbuild/ITKv4/Modules/ThirdParty/VNL/src/vxl/core/vnl/vnl_numeric_traits.h:415:42: error: declaration of constexpr static data member

      'maxval' requires an initializer

  static VNL_EXPORT VCL_CONSTEXPR double maxval VCL_STATIC_CONST_INIT_FLOAT_DECL(1.7976931348623157E+308);

                                         ^

/Users/pieper/slicer4/latest/Slicer-superbuild/ITKv4/Modules/ThirdParty/VNL/src/vxl/core/vnl/vnl_numeric_traits.h:434:47: error: declaration of constexpr static data member

      'zero' requires an initializer

  static VNL_EXPORT VCL_CONSTEXPR long double zero VCL_STATIC_CONST_INIT_FLOAT_DECL(0.0);

                                              ^

/Users/pieper/slicer4/latest/Slicer-superbuild/ITKv4/Modules/ThirdParty/VNL/src/vxl/core/vnl/vnl_numeric_traits.h:436:47: error: declaration of constexpr static data member

      'one' requires an initializer

  static VNL_EXPORT VCL_CONSTEXPR long double one VCL_STATIC_CONST_INIT_FLOAT_DECL(1.0);

                                              ^

/Users/pieper/slicer4/latest/Slicer-superbuild/ITKv4/Modules/ThirdParty/VNL/src/vxl/core/vnl/vnl_numeric_traits.h:438:47: error: declaration of constexpr static data member

      'maxval' requires an initializer

  static VNL_EXPORT VCL_CONSTEXPR long double maxval VCL_STATIC_CONST_INIT_FLOAT_DECL(1.7976931348623157E+308);

                                              ^

9 errors generated.

make[8]: *** [Code/Explicit/src/CMakeFiles/SimpleITKExplicit.dir/sitkExplicitITKComposeImageFilter.cxx.o] Error 1

make[7]: *** [Code/Explicit/src/CMakeFiles/SimpleITKExplicit.dir/all] Error 2

make[6]: *** [all] Error 2

make[5]: *** [SimpleITK-prefix/src/SimpleITK-stamp/SimpleITK-build] Error 2

make[4]: *** [CMakeFiles/SimpleITK.dir/all] Error 2

make[3]: *** [all] Error 2

make[2]: *** [SimpleITK-prefix/src/SimpleITK-stamp/SimpleITK-build] Error 2

make[1]: *** [CMakeFiles/SimpleITK.dir/all] Error 2

make: *** [all] Error 2

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