Merge pull request #8555 from tomoaki0705:jetsontx2

cmake/OpenCVDetectCUDA.cmake

@@ -88,7 +88,17 @@ if(CUDA_FOUND)
       set(__cuda_arch_bin "3.2")
       set(__cuda_arch_ptx "")
     elseif(AARCH64)
-      set(__cuda_arch_bin "5.3")
+      execute_process( COMMAND "${CUDA_NVCC_EXECUTABLE}" "${OpenCV_SOURCE_DIR}/cmake/checks/OpenCVDetectCudaArch.cu" "--run"
+                       WORKING_DIRECTORY "${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/"
+                       RESULT_VARIABLE _nvcc_res OUTPUT_VARIABLE _nvcc_out
+                       ERROR_QUIET OUTPUT_STRIP_TRAILING_WHITESPACE)
+      if(NOT _nvcc_res EQUAL 0)
+        message(STATUS "Automatic detection of CUDA generation failed. Going to build for all known architectures.")
+        set(__cuda_arch_bin "5.3 6.2")
+      else()
+        set(__cuda_arch_bin "${_nvcc_out}")
+        string(REPLACE "2.1" "2.1(2.0)" __cuda_arch_bin "${__cuda_arch_bin}")
+      endif()
       set(__cuda_arch_ptx "")
     else()
       if(${CUDA_VERSION} VERSION_LESS "8.0")
@@ -96,7 +106,6 @@ if(CUDA_FOUND)
       else()
         set(__cuda_arch_bin "2.0 3.0 3.5 3.7 5.0 5.2 6.0 6.1")
       endif()
-      set(__cuda_arch_ptx "")
     endif()
   endif()