moved finding CUDA_npp_LIBRARY to OpenCVDetectCUDA.cmake

cmake/OpenCVDetectCUDA.cmake

@@ -64,6 +64,9 @@ if(CUDA_FOUND)
 
   message(STATUS "CUDA NVCC target flags: ${CUDA_NVCC_FLAGS}")
 
+  unset(CUDA_npp_LIBRARY CACHE)
+  find_cuda_helper_libs(npp)
+
   macro(OCV_CUDA_COMPILE VAR)
     if (BUILD_SHARED_LIBS)
       set(CUDA_NVCC_FLAGS ${CUDA_NVCC_FLAGS} -Xcompiler -DCVAPI_EXPORTS)

modules/gpu/CMakeLists.txt

@@ -50,8 +50,6 @@ if (HAVE_CUDA)
   OCV_CUDA_COMPILE(cuda_objs ${lib_cuda} ${ncv_cuda})
   #CUDA_BUILD_CLEAN_TARGET()
   
-  unset(CUDA_npp_LIBRARY CACHE)
-  find_cuda_helper_libs(npp)
   set(cuda_link_libs ${CUDA_LIBRARIES} ${CUDA_npp_LIBRARY})
 else()
   set(lib_cuda "")