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<div>I’m making a patch for this.</div>
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<div>I’ve noticed this today as well.</div>
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<div>mkdir XX;</div>
<div>cd XX;</div>
<div>cmake -DCMAKE_CXX_STANDARD:STRING=11 ../ITK; </div>
<div>make –j23</div>
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<div>Before this patch, there was a build failure.</div>
<div>After this patch it is now building.</div>
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<div>I made modifications to more closely match upstream VXL.</div>
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<div>Gerrit- review at : <a href="http://review.source.kitware.com/#/c/20658">http://review.source.kitware.com/#/c/20658</a>/</div>
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<div>Hans</div>
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<span style="font-weight:bold">From: </span>Insight-developers <<a href="mailto:insight-developers-bounces@itk.org">insight-developers-bounces@itk.org</a>> on behalf of Bradley Lowekamp <<a href="mailto:brad@lowekamp.net">brad@lowekamp.net</a>><br>
<span style="font-weight:bold">Date: </span>Wednesday, January 13, 2016 at 6:38 PM<br>
<span style="font-weight:bold">To: </span>Isaiah Norton <<a href="mailto:isaiah.norton@gmail.com">isaiah.norton@gmail.com</a>><br>
<span style="font-weight:bold">Cc: </span>SPL Slicer Devel <<a href="mailto:slicer-devel@bwh.harvard.edu">slicer-devel@bwh.harvard.edu</a>>, Insight Developers <<a href="mailto:insight-developers@itk.org">insight-developers@itk.org</a>><br>
<span style="font-weight:bold">Subject: </span>Re: [ITK-dev] [slicer-devel] build error in simpleitk<br>
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<div>Hello,</div>
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<div>The patch looks pretty good. Thank you for contributing.</div>
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<div>Can you please submit the patch to ITK Gerrit for review?</div>
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<div><a href="http://www.itk.org/Wiki/ITK/Git/Develop">http://www.itk.org/Wiki/ITK/Git/Develop</a></div>
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<div>Thanks</div>
<div>Brad</div>
<div><br>
On Jan 13, 2016, at 6:47 PM, Isaiah Norton <<a href="mailto:isaiah.norton@gmail.com">isaiah.norton@gmail.com</a>> wrote:<br>
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<div>(cc: insight-devel)</div>
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<div>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:</div>
<div><a href="https://open.cdash.org/buildSummary.php?buildid=4188623" target="_blank">https://open.cdash.org/buildSummary.php?buildid=4188623</a><br>
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<div>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 `<span style="font-size:12.8px">VCL_STATIC_CONST_INIT_*</span><span style="font-size:12.8px">`
macros.</span><br>
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<div><span style="font-size:12.8px"><br>
</span></div>
<div><span style="font-size:12.8px">For reference, VCL_CONSTEXPR was introduced here:</span></div>
<div><span style="font-size:12.8px"><a href="http://review.source.kitware.com/#/c/20386/">http://review.source.kitware.com/#/c/20386/</a></span><br>
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<div>A proposed patch [1] is attached.</div>
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<div>Best,</div>
<div>Isaiah</div>
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<div>[1] <a href="https://github.com/ihnorton/ITK/commit/0f748d8c86ffb2369c3a343c0db5ca87b067843e">
https://github.com/ihnorton/ITK/commit/0f748d8c86ffb2369c3a343c0db5ca87b067843e</a><br>
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<div class="gmail_extra"><br>
<div class="gmail_quote">On Mon, Jan 11, 2016 at 11:21 AM, Steve Pieper <span dir="ltr">
<<a href="mailto:pieper@isomics.com" target="_blank">pieper@isomics.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
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<p><span>Hi - </span></p>
<p><span>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.</span></p>
<p><span>I found an old issue with similar errors [1] but nothing lately. </span></p>
<p><span>-Steve</span></p>
<p><span>[1] <a href="https://issues.itk.org/jira/browse/ITK-2976" target="_blank">
https://issues.itk.org/jira/browse/ITK-2976</a><br>
</span></p>
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<p><span>In file included from /Users/pieper/slicer4/latest/Slicer-superbuild/ITKv4/Modules/ThirdParty/VNL/src/vxl/core/vnl/vnl_c_vector.h:26:</span></p>
<p><span><b>/Users/pieper/slicer4/latest/Slicer-superbuild/ITKv4/Modules/ThirdParty/VNL/src/vxl/core/vnl/vnl_numeric_traits.h:388:41:
</b></span><span><b>error: </b></span><span><b>declaration of constexpr static data member</b></span></p>
<p><span><b> 'zero' requires an initializer</b></span></p>
<p><span> static VNL_EXPORT VCL_CONSTEXPR float zero VCL_STATIC_CONST_INIT_FLOAT_DECL(0.0F);</span></p>
<p><span><b> ^</b></span></p>
<p><span><b>/Users/pieper/slicer4/latest/Slicer-superbuild/ITKv4/Modules/ThirdParty/VNL/src/vxl/core/vnl/vnl_numeric_traits.h:390:41:
</b></span><span><b>error: </b></span><span><b>declaration of constexpr static data member</b></span></p>
<p><span><b> 'one' requires an initializer</b></span></p>
<p><span> static VNL_EXPORT VCL_CONSTEXPR float one VCL_STATIC_CONST_INIT_FLOAT_DECL(1.0F);</span></p>
<p><span><b> ^</b></span></p>
<p><span><b>/Users/pieper/slicer4/latest/Slicer-superbuild/ITKv4/Modules/ThirdParty/VNL/src/vxl/core/vnl/vnl_numeric_traits.h:392:41:
</b></span><span><b>error: </b></span><span><b>declaration of constexpr static data member</b></span></p>
<p><span><b> 'maxval' requires an initializer</b></span></p>
<p><span> static VNL_EXPORT VCL_CONSTEXPR float maxval VCL_STATIC_CONST_INIT_FLOAT_DECL(3.40282346638528860e+38F);</span></p>
<p><span><b> ^</b></span></p>
<p><span><b>/Users/pieper/slicer4/latest/Slicer-superbuild/ITKv4/Modules/ThirdParty/VNL/src/vxl/core/vnl/vnl_numeric_traits.h:411:42:
</b></span><span><b>error: </b></span><span><b>declaration of constexpr static data member</b></span></p>
<p><span><b> 'zero' requires an initializer</b></span></p>
<p><span> static VNL_EXPORT VCL_CONSTEXPR double zero VCL_STATIC_CONST_INIT_FLOAT_DECL(0.0);</span></p>
<p><span><b> ^</b></span></p>
<p><span><b>/Users/pieper/slicer4/latest/Slicer-superbuild/ITKv4/Modules/ThirdParty/VNL/src/vxl/core/vnl/vnl_numeric_traits.h:413:42:
</b></span><span><b>error: </b></span><span><b>declaration of constexpr static data member</b></span></p>
<p><span><b> 'one' requires an initializer</b></span></p>
<p><span> static VNL_EXPORT VCL_CONSTEXPR double one VCL_STATIC_CONST_INIT_FLOAT_DECL(1.0);</span></p>
<p><span><b> ^</b></span></p>
<p><span><b>/Users/pieper/slicer4/latest/Slicer-superbuild/ITKv4/Modules/ThirdParty/VNL/src/vxl/core/vnl/vnl_numeric_traits.h:415:42:
</b></span><span><b>error: </b></span><span><b>declaration of constexpr static data member</b></span></p>
<p><span><b> 'maxval' requires an initializer</b></span></p>
<p><span> static VNL_EXPORT VCL_CONSTEXPR double maxval VCL_STATIC_CONST_INIT_FLOAT_DECL(1.7976931348623157E+308);</span></p>
<p><span><b> ^</b></span></p>
<p><span><b>/Users/pieper/slicer4/latest/Slicer-superbuild/ITKv4/Modules/ThirdParty/VNL/src/vxl/core/vnl/vnl_numeric_traits.h:434:47:
</b></span><span><b>error: </b></span><span><b>declaration of constexpr static data member</b></span></p>
<p><span><b> 'zero' requires an initializer</b></span></p>
<p><span> static VNL_EXPORT VCL_CONSTEXPR long double zero VCL_STATIC_CONST_INIT_FLOAT_DECL(0.0);</span></p>
<p><span><b> ^</b></span></p>
<p><span><b>/Users/pieper/slicer4/latest/Slicer-superbuild/ITKv4/Modules/ThirdParty/VNL/src/vxl/core/vnl/vnl_numeric_traits.h:436:47:
</b></span><span><b>error: </b></span><span><b>declaration of constexpr static data member</b></span></p>
<p><span><b> 'one' requires an initializer</b></span></p>
<p><span> static VNL_EXPORT VCL_CONSTEXPR long double one VCL_STATIC_CONST_INIT_FLOAT_DECL(1.0);</span></p>
<p><span><b> ^</b></span></p>
<p><span><b>/Users/pieper/slicer4/latest/Slicer-superbuild/ITKv4/Modules/ThirdParty/VNL/src/vxl/core/vnl/vnl_numeric_traits.h:438:47:
</b></span><span><b>error: </b></span><span><b>declaration of constexpr static data member</b></span></p>
<p><span><b> 'maxval' requires an initializer</b></span></p>
<p><span> static VNL_EXPORT VCL_CONSTEXPR long double maxval VCL_STATIC_CONST_INIT_FLOAT_DECL(1.7976931348623157E+308);</span></p>
<p><span><b> ^</b></span></p>
<p><span>9 errors generated.</span></p>
<p><span>make[8]: *** [Code/Explicit/src/CMakeFiles/SimpleITKExplicit.dir/sitkExplicitITKComposeImageFilter.cxx.o] Error 1</span></p>
<p><span>make[7]: *** [Code/Explicit/src/CMakeFiles/SimpleITKExplicit.dir/all] Error 2</span></p>
<p><span>make[6]: *** [all] Error 2</span></p>
<p><span>make[5]: *** [SimpleITK-prefix/src/SimpleITK-stamp/SimpleITK-build] Error 2</span></p>
<p><span>make[4]: *** [CMakeFiles/SimpleITK.dir/all] Error 2</span></p>
<p><span>make[3]: *** [all] Error 2</span></p>
<p><span>make[2]: *** [SimpleITK-prefix/src/SimpleITK-stamp/SimpleITK-build] Error 2</span></p>
<p><span>make[1]: *** [CMakeFiles/SimpleITK.dir/all] Error 2</span></p>
<p><span>make: *** [all] Error 2</span></p>
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<blockquote type="cite">
<div><0001-COMP-fix-build-with-std-c-11-when-ITK-VXL-initially-.patch></div>
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<blockquote type="cite">
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