Errors

[ 92%] Building CXX object tests/unit/CMakeFiles/shogun-unit-test.dir/classifier/LDA_unittest.cc.o
Linking CXX executable shogun-unit-test
CMakeFiles/shogun-unit-test.dir/features/StreamingSparseFeatures_unittest.cc.o: In function `testing::internal::FloatingPoint<double>::DistanceBetweenSignAndMagnitudeNumbers(unsigned long long const&, unsigned long long const&)':
/home/chris/programming/shogun/tests/unit/features/StreamingSparseFeatures_unittest.cc:22: warning: the use of `mktemp' is dangerous, better use `mkstemp' or `mkdtemp'
CMakeFiles/shogun-unit-test.dir/DynamicObjectArray_unittest.cc.o: In function `__static_initialization_and_destruction_0':
/home/chris/programming/shogun/tests/unit/DynamicObjectArray_unittest.cc:16: undefined reference to `testing::internal::MakeAndRegisterTestInfo(char const*, char const*, char const*, char const*, void const*, void (*)(), void (*)(), testing::internal::TestFactoryBase*)'
/home/chris/programming/shogun/tests/unit/DynamicObjectArray_unittest.cc:37: undefined reference to `testing::internal::MakeAndRegisterTestInfo(char const*, char const*, char const*, char const*, void const*, void (*)(), void (*)(), testing::internal::TestFactoryBase*)'
/home/chris/programming/shogun/tests/unit/DynamicObjectArray_unittest.cc:58: undefined reference to `testing::internal::MakeAndRegisterTestInfo(char const*, char const*, char const*, char const*, void const*, void (*)(), void (*)(), testing::internal::TestFactoryBase*)'
/home/chris/programming/shogun/tests/unit/DynamicObjectArray_unittest.cc:79: undefined reference to `testing::internal::MakeAndRegisterTestInfo(char const*, char const*, char const*, char const*, void const*, void (*)(), void (*)(), testing::internal::TestFactoryBase*)'
/home/chris/programming/shogun/tests/unit/DynamicObjectArray_unittest.cc:100: undefined reference to `testing::internal::MakeAndRegisterTestInfo(char const*, char const*, char const*, char const*, void const*, void (*)(), void (*)(), testing::internal::TestFactoryBase*)'
CMakeFiles/shogun-unit-test.dir/DynamicObjectArray_unittest.cc.o:/home/chris/programming/shogun/tests/unit/DynamicObjectArray_unittest.cc:121: more undefined references to `testing::internal::MakeAndRegisterTestInfo(char const*, char const*, char const*, char const*, void const*, void (*)(), void (*)(), testing::internal::TestFactoryBase*)' follow
CMakeFiles/shogun-unit-test.dir/structure/DualLibQPBMSOSVM_unittest.cc.o: In function `testing::internal::ParameterizedTestCaseInfo<DualLibQPBMSOSVMTestLoopSolvers>* testing::internal::ParameterizedTestCaseRegistry::GetTestCasePatternHolder<DualLibQPBMSOSVMTestLoopSolvers>(char const*, char const*, int)':
/home/chris/programming/shogun/build/GoogleMock/src/GoogleMock/gtest/include/gtest/internal/gtest-param-util.h:581: undefined reference to `testing::internal::ReportInvalidTestCaseType(char const*, char const*, int)'
CMakeFiles/shogun-unit-test.dir/structure/DualLibQPBMSOSVM_unittest.cc.o: In function `testing::internal::ParameterizedTestCaseInfo<DualLibQPBMSOSVMTestLoopSolvers>::RegisterTests()':
/home/chris/programming/shogun/build/GoogleMock/src/GoogleMock/gtest/include/gtest/internal/gtest-param-util.h:508: undefined reference to `testing::internal::MakeAndRegisterTestInfo(char const*, char const*, char const*, char const*, void const*, void (*)(), void (*)(), testing::internal::TestFactoryBase*)'
CMakeFiles/shogun-unit-test.dir/structure/SOSVM_unittest.cc.o: In function `__static_initialization_and_destruction_0':
/home/chris/programming/shogun/tests/unit/structure/SOSVM_unittest.cc:16: undefined reference to `testing::internal::MakeAndRegisterTestInfo(char const*, char const*, char const*, char const*, void const*, void (*)(), void (*)(), testing::internal::TestFactoryBase*)'
/home/chris/programming/shogun/tests/unit/structure/SOSVM_unittest.cc:97: undefined reference to `testing::internal::MakeAndRegisterTestInfo(char const*, char const*, char const*, char const*, void const*, void (*)(), void (*)(), testing::internal::TestFactoryBase*)'
CMakeFiles/shogun-unit-test.dir/structure/MultilabelSOLabels_unittest.cc.o: In function `__static_initialization_and_destruction_0':
/home/chris/programming/shogun/tests/unit/structure/MultilabelSOLabels_unittest.cc:14: undefined reference to `testing::internal::MakeAndRegisterTestInfo(char const*, char const*, char const*, char const*, void const*, void (*)(), void (*)(), testing::internal::TestFactoryBase*)'
/home/chris/programming/shogun/tests/unit/structure/MultilabelSOLabels_unittest.cc:26: undefined reference to `testing::internal::MakeAndRegisterTestInfo(char const*, char const*, char const*, char const*, void const*, void (*)(), void (*)(), testing::internal::TestFactoryBase*)'
CMakeFiles/shogun-unit-test.dir/structure/MultilabelSOLabels_unittest.cc.o:/home/chris/programming/shogun/tests/unit/structure/MultilabelSOLabels_unittest.cc:38: more undefined references to `testing::internal::MakeAndRegisterTestInfo(char const*, char const*, char const*, char const*, void const*, void (*)(), void (*)(), testing::internal::TestFactoryBase*)' follow
collect2: error: ld returned 1 exit status
make[2]: *** [tests/unit/shogun-unit-test] Error 1
make[1]: *** [tests/unit/CMakeFiles/shogun-unit-test.dir/all] Error 2
make: *** [all] Error 2