所以我正在尝试构建Affine Registration Filter，这是ITK提供的一个例子。
文件构建，但是我收到一个链接器错误，它说渐变步骤优化器引用了一个未定义的基本模板。我检查了相应的ITK目录，基础模板文件就在那里。此外，当使用原始渐变步骤优化器（而不是v4）时，文件将链接。库中存在错误（可能不太可能）或者我的系统上的某些内容正在丢失链接。
目前使用cmake 3.11，Slicer 4和ITK 4.13。我通过向导创建了一个新的Slicer扩展，并在其中添加了一个cli模块作为测试平台，如果有人想尝试再次准确地重现错误。
Linking CXX shared library ../lib/Slicer-4.8/cli/modules/libImageRegistration9Lib.dylib
Undefined symbols for architecture x86_64:
"itk::ObjectToObjectOptimizerBaseTemplate<double>::SetWeights(itk::OptimizerParameters<double>)", referenced from:
vtable for itk::RegularStepGradientDescentOptimizerv4<double> in ImageRegistration9.cxx.o
vtable for itk::GradientDescentOptimizerv4Template<double> in ImageRegistration9.cxx.o
vtable for itk::GradientDescentOptimizerBasev4Template<double> in ImageRegistration9.cxx.o
"itk::ObjectToObjectOptimizerBaseTemplate<double>::StartOptimization(bool)", referenced from:
itk::GradientDescentOptimizerBasev4Template<double>::StartOptimization(bool) in ImageRegistration9.cxx.o
"itk::ObjectToObjectOptimizerBaseTemplate<double>::DoEstimateScalesOn()", referenced from:
vtable for itk::RegularStepGradientDescentOptimizerv4<double> in ImageRegistration9.cxx.o
vtable for itk::GradientDescentOptimizerv4Template<double> in ImageRegistration9.cxx.o
vtable for itk::GradientDescentOptimizerBasev4Template<double> in ImageRegistration9.cxx.o
"itk::ObjectToObjectOptimizerBaseTemplate<double>::SetNumberOfThreads(unsigned int)", referenced from:
vtable for itk::RegularStepGradientDescentOptimizerv4<double> in ImageRegistration9.cxx.o
vtable for itk::GradientDescentOptimizerv4Template<double> in ImageRegistration9.cxx.o
vtable for itk::GradientDescentOptimizerBasev4Template<double> in ImageRegistration9.cxx.o
"itk::ObjectToObjectOptimizerBaseTemplate<double>::SetScalesEstimator(itk::OptimizerParameterScalesEstimatorTemplate<double>*)", referenced from:
vtable for itk::RegularStepGradientDescentOptimizerv4<double> in ImageRegistration9.cxx.o
vtable for itk::GradientDescentOptimizerv4Template<double> in ImageRegistration9.cxx.o
vtable for itk::GradientDescentOptimizerBasev4Template<double> in ImageRegistration9.cxx.o
"itk::ObjectToObjectOptimizerBaseTemplate<double>::DoEstimateScalesOff()", referenced from:
vtable for itk::RegularStepGradientDescentOptimizerv4<double> in ImageRegistration9.cxx.o
vtable for itk::GradientDescentOptimizerv4Template<double> in ImageRegistration9.cxx.o
vtable for itk::GradientDescentOptimizerBasev4Template<double> in ImageRegistration9.cxx.o
"itk::ObjectToObjectOptimizerBaseTemplate<double>::GetModifiableMetric()", referenced from:
vtable for itk::RegularStepGradientDescentOptimizerv4<double> in ImageRegistration9.cxx.o
vtable for itk::GradientDescentOptimizerv4Template<double> in ImageRegistration9.cxx.o
vtable for itk::GradientDescentOptimizerBasev4Template<double> in ImageRegistration9.cxx.o
"itk::ObjectToObjectOptimizerBaseTemplate<double>::SetDoEstimateScales(bool)", referenced from:
vtable for itk::RegularStepGradientDescentOptimizerv4<double> in ImageRegistration9.cxx.o
vtable for itk::GradientDescentOptimizerv4Template<double> in ImageRegistration9.cxx.o
vtable for itk::GradientDescentOptimizerBasev4Template<double> in ImageRegistration9.cxx.o
"itk::ObjectToObjectOptimizerBaseTemplate<double>::GetMetric()", referenced from:
vtable for itk::RegularStepGradientDescentOptimizerv4<double> in ImageRegistration9.cxx.o
vtable for itk::GradientDescentOptimizerv4Template<double> in ImageRegistration9.cxx.o
vtable for itk::GradientDescentOptimizerBasev4Template<double> in ImageRegistration9.cxx.o
"itk::ObjectToObjectOptimizerBaseTemplate<double>::SetMetric(itk::ObjectToObjectMetricBaseTemplate<double>*)", referenced from:
vtable for itk::RegularStepGradientDescentOptimizerv4<double> in ImageRegistration9.cxx.o
vtable for itk::GradientDescentOptimizerv4Template<double> in ImageRegistration9.cxx.o
vtable for itk::GradientDescentOptimizerBasev4Template<double> in ImageRegistration9.cxx.o
"itk::ObjectToObjectOptimizerBaseTemplate<double>::SetScales(itk::OptimizerParameters<double> const&)", referenced from:
vtable for itk::RegularStepGradientDescentOptimizerv4<double> in ImageRegistration9.cxx.o
vtable for itk::GradientDescentOptimizerv4Template<double> in ImageRegistration9.cxx.o
vtable for itk::GradientDescentOptimizerBasev4Template<double> in ImageRegistration9.cxx.o
"itk::ObjectToObjectOptimizerBaseTemplate<double>::ObjectToObjectOptimizerBaseTemplate()", referenced from:
itk::GradientDescentOptimizerBasev4Template<double>::GradientDescentOptimizerBasev4Template() in ImageRegistration9.cxx.o
"itk::ObjectToObjectOptimizerBaseTemplate<double>::~ObjectToObjectOptimizerBaseTemplate()", referenced from:
itk::GradientDescentOptimizerBasev4Template<double>::GradientDescentOptimizerBasev4Template() in ImageRegistration9.cxx.o
itk::GradientDescentOptimizerBasev4Template<double>::~GradientDescentOptimizerBasev4Template() in ImageRegistration9.cxx.o
"itk::ObjectToObjectOptimizerBaseTemplate<double>::GetWeights() const", referenced from:
vtable for itk::RegularStepGradientDescentOptimizerv4<double> in ImageRegistration9.cxx.o
vtable for itk::GradientDescentOptimizerv4Template<double> in ImageRegistration9.cxx.o
vtable for itk::GradientDescentOptimizerBasev4Template<double> in ImageRegistration9.cxx.o
"itk::ObjectToObjectOptimizerBaseTemplate<double>::GetCurrentPosition() const", referenced from:
vtable for itk::RegularStepGradientDescentOptimizerv4<double> in ImageRegistration9.cxx.o
vtable for itk::GradientDescentOptimizerv4Template<double> in ImageRegistration9.cxx.o
vtable for itk::GradientDescentOptimizerBasev4Template<double> in ImageRegistration9.cxx.o
"itk::ObjectToObjectOptimizerBaseTemplate<double>::GetNumberOfThreads() const", referenced from:
vtable for itk::RegularStepGradientDescentOptimizerv4<double> in ImageRegistration9.cxx.o
vtable for itk::GradientDescentOptimizerv4Template<double> in ImageRegistration9.cxx.o
vtable for itk::GradientDescentOptimizerBasev4Template<double> in ImageRegistration9.cxx.o
"itk::ObjectToObjectOptimizerBaseTemplate<double>::GetDoEstimateScales() const", referenced from:
vtable for itk::RegularStepGradientDescentOptimizerv4<double> in ImageRegistration9.cxx.o
vtable for itk::GradientDescentOptimizerv4Template<double> in ImageRegistration9.cxx.o
vtable for itk::GradientDescentOptimizerBasev4Template<double> in ImageRegistration9.cxx.o
"itk::ObjectToObjectOptimizerBaseTemplate<double>::GetScalesAreIdentity() const", referenced from:
vtable for itk::RegularStepGradientDescentOptimizerv4<double> in ImageRegistration9.cxx.o
vtable for itk::GradientDescentOptimizerv4Template<double> in ImageRegistration9.cxx.o
vtable for itk::GradientDescentOptimizerBasev4Template<double> in ImageRegistration9.cxx.o
"itk::ObjectToObjectOptimizerBaseTemplate<double>::GetCurrentMetricValue() const", referenced from:
vtable for itk::RegularStepGradientDescentOptimizerv4<double> in ImageRegistration9.cxx.o
vtable for itk::GradientDescentOptimizerv4Template<double> in ImageRegistration9.cxx.o
vtable for itk::GradientDescentOptimizerBasev4Template<double> in ImageRegistration9.cxx.o
"itk::ObjectToObjectOptimizerBaseTemplate<double>::GetWeightsAreIdentity() const", referenced from:
vtable for itk::RegularStepGradientDescentOptimizerv4<double> in ImageRegistration9.cxx.o
vtable for itk::GradientDescentOptimizerv4Template<double> in ImageRegistration9.cxx.o
vtable for itk::GradientDescentOptimizerBasev4Template<double> in ImageRegistration9.cxx.o
"itk::ObjectToObjectOptimizerBaseTemplate<double>::GetValue() const", referenced from:
vtable for itk::RegularStepGradientDescentOptimizerv4<double> in ImageRegistration9.cxx.o
vtable for itk::GradientDescentOptimizerv4Template<double> in ImageRegistration9.cxx.o
vtable for itk::GradientDescentOptimizerBasev4Template<double> in ImageRegistration9.cxx.o
"itk::ObjectToObjectOptimizerBaseTemplate<double>::GetMetric() const", referenced from:
vtable for itk::RegularStepGradientDescentOptimizerv4<double> in ImageRegistration9.cxx.o
vtable for itk::GradientDescentOptimizerv4Template<double> in ImageRegistration9.cxx.o
vtable for itk::GradientDescentOptimizerBasev4Template<double> in ImageRegistration9.cxx.o
"itk::ObjectToObjectOptimizerBaseTemplate<double>::GetScales() const", referenced from:
vtable for itk::RegularStepGradientDescentOptimizerv4<double> in ImageRegistration9.cxx.o
vtable for itk::GradientDescentOptimizerv4Template<double> in ImageRegistration9.cxx.o
vtable for itk::GradientDescentOptimizerBasev4Template<double> in ImageRegistration9.cxx.o
"itk::ObjectToObjectOptimizerBaseTemplate<double>::PrintSelf(std::__1::basic_ostream<char, std::__1::char_traits<char> >&, itk::Indent) const", referenced from:
itk::GradientDescentOptimizerBasev4Template<double>::PrintSelf(std::__1::basic_ostream<char, std::__1::char_traits<char> >&, itk::Indent) const in ImageRegistration9.cxx.o
"typeinfo for itk::ObjectToObjectOptimizerBaseTemplate<double>", referenced from:
typeinfo for itk::GradientDescentOptimizerBasev4Template<double> in ImageRegistration9.cxx.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
make[2]: *** [lib/Slicer-4.8/cli-modules/libImageRegistration9Lib.dylib] Error 1
make[1]: *** [ImageRegistration9/CMakeFiles/ImageRegistration9Lib.dir/all] Error 2