[cmake] perform CUDA intrinsic function check through generated confi…

…g file

CMakeLists.txt

@@ -164,16 +164,15 @@ if(CCTAG_WITH_CUDA)
   # set(CUDA_NVCC_FLAGS         "${CUDA_NVCC_FLAGS};-gencode=arch=compute_52,code=sm_52;-gencode=arch=compute_52,code=compute_52;--default-stream;per-thread;-Xptxas;--warn-on-local-memory-usage;-Xptxas;--warn-on-spills")
   cuda_find_library_local_first(CUDA_CUDADEVRT_LIBRARY cudadevrt "\"cudadevrt\" library")
 
+  if( ( CUDA_VERSION VERSION_EQUAL "9.0" ) OR ( CUDA_VERSION VERSION_GREATER "9.0") )
+    set(CCTAG_HAVE_SHFL_DOWN_SYNC   1)
+  else()
+    set(CCTAG_HAVE_SHFL_DOWN_SYNC   0)
+  endif()
 else(CCTAG_WITH_CUDA)
   message( STATUS "Building without CUDA" )
 endif(CCTAG_WITH_CUDA)
 
-if( ( CUDA_VERSION VERSION_EQUAL "9.0" ) OR ( CUDA_VERSION VERSION_GREATER "9.0") )
-  set(HAVE_SHFL_DOWN_SYNC   1)
-else()
-  set(HAVE_SHFL_DOWN_SYNC   0)
-endif()
-
 # FIND OPENCV
 find_package(OpenCV REQUIRED core videoio imgproc imgcodecs)
 

cmake/config.hpp.in

@@ -28,4 +28,8 @@
 
   #define CUB_CDP
 
-#endif
+  #ifndef CCTAG_HAVE_SHFL_DOWN_SYNC
+  #cmakedefine CCTAG_HAVE_SHFL_DOWN_SYNC
+  #endif
+
+#endif

src/CMakeLists.txt

@@ -114,6 +114,10 @@ if(CCTAG_WITH_CUDA)
                          PUBLIC -DCCTAG_WITH_CUDA -DCUB_CDP
                          PRIVATE ${TBB_DEFINITIONS})
 
+  if(CCTAG_HAVE_SHFL_DOWN_SYNC)
+    target_compile_definitions(CCTag PRIVATE "-DCCTAG_HAVE_SHFL_DOWN_SYNC")
+  endif(CCTAG_HAVE_SHFL_DOWN_SYNC)
+
   # This is nececessary for the CCTagConfig.cmake to correctly export the
   # includes, always because we used CUDA_ADD_LIBRARY
   set_target_properties(CCTag PROPERTIES INTERFACE_INCLUDE_DIRECTORIES
@@ -171,9 +175,6 @@ endif(CCTAG_NO_COUT)
 if(CCTAG_VISUAL_DEBUG)
   target_compile_definitions(CCTag PRIVATE "-DCCTAG_VISUAL_DEBUG")
 endif(CCTAG_VISUAL_DEBUG)
-if(HAVE_SHFL_DOWN_SYNC)
-  target_compile_definitions(CCTag PRIVATE "-DCCTAG_HAVE_SHFL_DOWN_SYNC")
-endif(HAVE_SHFL_DOWN_SYNC)
 
 
 # EXPORTING THE LIBRARY