[ITK Community] Linker errors on Mac 10.7 with ITK 4.5.1

[Bradley Lowekamp]

A work around to some of this issue it to add "-fvisibility=default" to CMAKE_CXX_FLAGS. This version of clang appears to be broken with exporting of explicitly instantiated templates.

Brad

On Mar 6, 2014, at 10:18 AM, Fetzer, Andreas <a.fetzer at Dkfz-Heidelberg.de> wrote:

> Hi Brad,
>  
> I finally got it working. I had to disable BUILD_TESTING and BUILD_EXAMPLES in CMake.
> I will try to set up a dartclient this week. Is there a way in the dashboard script to force the build as shared libraries?
>  
> Thanks a lot again!
>  
> Andreas
>  
> From: Bradley Lowekamp [mailto:blowekamp at mail.nih.gov] 
> Sent: Mittwoch, 5. März 2014 17:38
> To: Matt McCormick
> Cc: Fetzer, Andreas; community at itk.org
> Subject: Re: [ITK Community] Linker errors on Mac 10.7 with ITK 4.5.1
>  
> Hello,
>  
> I was unable to reproduce your error on the current release branch.
>  
> $ clang --version
> Apple clang version 3.1 (tags/Apple/clang-318.0.54) (based on LLVM 3.1svn)
> Target: x86_64-apple-darwin11.4.2
> Thread model: posix
>  
> $ CC=/usr/bin/clang CXX=/usr/bin/clang++ cmake DBUILD_SHARED_LIBS:BOOL=ON ../ITK && make -j 6
>  
> This compiled fine for me.
>  
> Brad
>  
> On Mar 5, 2014, at 11:17 AM, Matt McCormick <matt.mccormick at kitware.com> wrote:
> 
> 
> Hi Andreas,
>  
> 
> On Wed, Mar 5, 2014 at 10:32 AM, Fetzer, Andreas <a.fetzer at dkfz-heidelberg.de> wrote:
> Hi Matt,
>  
> yes I have seen that the patch was merge into your release branch. However I still get linker errors. This time for itk::NumericTraits:
>  
> Linking CXX executable ../../../../bin/ITKCommon1TestDriver
> Undefined symbols for architecture x86_64:
>   "itk::NumericTraits<itk::CovariantVector<char, 1u> >::Zero", referenced from:
>       void CheckFixedArrayTraits<itk::CovariantVector<char, 1u> >(itk::CovariantVector<char, 1u> const&) in itkNumericTraitsTest.cxx.o
>   "itk::NumericTraits<itk::CovariantVector<char, 1u> >::One", referenced from:
>       void CheckFixedArrayTraits<itk::CovariantVector<char, 1u> >(itk::CovariantVector<char, 1u> const&) in itkNumericTraitsTest.cxx.o
>   "itk::NumericTraits<itk::CovariantVector<signed char, 1u> >::Zero", referenced from:
>       void CheckFixedArrayTraits<itk::CovariantVector<signed char, 1u> >(itk::CovariantVector<signed char, 1u> const&) in itkNumericTraitsTest.cxx.o
>   "itk::NumericTraits<itk::CovariantVector<signed char, 1u> >::One", referenced from:
>       void CheckFixedArrayTraits<itk::CovariantVector<signed char, 1u> >(itk::CovariantVector<signed char, 1u> const&) in itkNumericTraitsTest.cxx.o
>   "itk::NumericTraits<itk::CovariantVector<unsigned char, 1u> >::Zero", referenced from:
>       void CheckFixedArrayTraits<itk::CovariantVector<unsigned char, 1u> >(itk::CovariantVector<unsigned char, 1u> const&) in itkNumericTraitsTest.cxx.o
>  
> Is this already know to you?
>  
> No.  If this platform is important to you, please consider setting up a Nightly dashboard submission [1].  Inspecting the code, I do not see the issue.  The symbol appears to be created [2] with the correct exports [3].  Maybe a dashboard submission will show details that will help us work together to fix the issue.
>  
> When will the 4.5.2 be released?
> Our own release is scheduled for the end of March. Before that we would like to solve the linker errors in ITK.
>  
>  
> If we can get issue fixed, we would be happy to coordinate with you and get 4.5.2 released in later in March before your release.
>  
> Thanks,
> Matt 
>  
> [1]  http://www.itk.org/Wiki/ITK/Git/Dashboard
>  
> [2] http://itk.org/gitweb?p=ITK.git;a=blob;f=Modules/Core/Common/include/itkNumericTraitsFixedArrayPixel.h;h=1db158e8800fb156b8ae1cb491ac6020f2a6b296;hb=HEAD#l187
>  
> [3] http://itk.org/gitweb?p=ITK.git;a=blob;f=Modules/Core/Common/src/itkNumericTraitsCovariantVectorPixel.cxx;h=e63057e8b6ad4eae24844f077caec2ea486d0f96;hb=HEAD#l22
>  
>  
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