fix CUDA build crash

  * add --std=c++11 flag to nvcc definition
  * remove not used abs functions

cmake/OpenCVDetectCUDA.cmake

@@ -211,7 +211,7 @@ if(CUDA_FOUND)
     endif()
 
     if(UNIX OR APPLE)
-      set(CUDA_NVCC_FLAGS ${CUDA_NVCC_FLAGS} -Xcompiler -fPIC)
+      set(CUDA_NVCC_FLAGS ${CUDA_NVCC_FLAGS} -Xcompiler -fPIC --std=c++11)
     endif()
     if(APPLE)
       set(CUDA_NVCC_FLAGS ${CUDA_NVCC_FLAGS} -Xcompiler -fno-finite-math-only)

modules/core/include/opencv2/core/cuda/vec_math.hpp

@@ -199,14 +199,7 @@ CV_CUDEV_IMPLEMENT_VEC_UNARY_OP(~, uint, uint)
         return VecTraits<output_type ## 4>::make(func (a.x), func (a.y), func (a.z), func (a.w)); \
     }
 
-CV_CUDEV_IMPLEMENT_VEC_UNARY_FUNC(abs, /*::abs*/, uchar, uchar)
-CV_CUDEV_IMPLEMENT_VEC_UNARY_FUNC(abs, ::abs, char, char)
-CV_CUDEV_IMPLEMENT_VEC_UNARY_FUNC(abs, /*::abs*/, ushort, ushort)
-CV_CUDEV_IMPLEMENT_VEC_UNARY_FUNC(abs, ::abs, short, short)
-CV_CUDEV_IMPLEMENT_VEC_UNARY_FUNC(abs, ::abs, int, int)
-CV_CUDEV_IMPLEMENT_VEC_UNARY_FUNC(abs, /*::abs*/, uint, uint)
 CV_CUDEV_IMPLEMENT_VEC_UNARY_FUNC(abs, ::fabsf, float, float)
-CV_CUDEV_IMPLEMENT_VEC_UNARY_FUNC(abs, ::fabs, double, double)
 
 CV_CUDEV_IMPLEMENT_VEC_UNARY_FUNC(sqrt, ::sqrtf, uchar, float)
 CV_CUDEV_IMPLEMENT_VEC_UNARY_FUNC(sqrt, ::sqrtf, char, float)

modules/cudev/test/CMakeLists.txt

@@ -15,7 +15,7 @@ if(OCV_DEPENDENCIES_FOUND)
 
   ocv_cuda_filter_options()
 
-  CUDA_ADD_EXECUTABLE(${the_target} ${OPENCV_TEST_${the_module}_SOURCES})
+  CUDA_ADD_EXECUTABLE(${the_target} ${OPENCV_TEST_${the_module}_SOURCES} OPTIONS -std=c++11)
   ocv_target_link_libraries(${the_target} LINK_PRIVATE
       ${test_deps} ${OPENCV_LINKER_LIBS} ${CUDA_LIBRARIES}
   )