Don't build CUDA modules stubs by default (use -DBUILD_CUDA_STUBS=ON if need them)

modules/cuda/CMakeLists.txt

@@ -1,4 +1,4 @@
-if(IOS)
+if(IOS OR (NOT HAVE_CUDA AND NOT BUILD_CUDA_STUBS))
   ocv_module_disable(cuda)
 endif()
 

modules/cudaarithm/CMakeLists.txt

@@ -1,4 +1,4 @@
-if(IOS)
+if(IOS OR (NOT HAVE_CUDA AND NOT BUILD_CUDA_STUBS))
   ocv_module_disable(cudaarithm)
 endif()
 

modules/cudabgsegm/CMakeLists.txt

@@ -1,4 +1,4 @@
-if(IOS)
+if(IOS OR (NOT HAVE_CUDA AND NOT BUILD_CUDA_STUBS))
   ocv_module_disable(cudabgsegm)
 endif()
 

modules/cudacodec/CMakeLists.txt

@@ -1,4 +1,4 @@
-if(IOS OR APPLE)
+if(IOS OR APPLE OR (NOT HAVE_CUDA AND NOT BUILD_CUDA_STUBS))
   ocv_module_disable(cudacodec)
 endif()
 

modules/cudafeatures2d/CMakeLists.txt

@@ -1,4 +1,4 @@
-if(IOS)
+if(IOS OR (NOT HAVE_CUDA AND NOT BUILD_CUDA_STUBS))
   ocv_module_disable(cudafeatures2d)
 endif()
 

modules/cudafilters/CMakeLists.txt

@@ -1,4 +1,4 @@
-if(IOS)
+if(IOS OR (NOT HAVE_CUDA AND NOT BUILD_CUDA_STUBS))
   ocv_module_disable(cudafilters)
 endif()
 

modules/cudaimgproc/CMakeLists.txt

@@ -1,4 +1,4 @@
-if(IOS)
+if(IOS OR (NOT HAVE_CUDA AND NOT BUILD_CUDA_STUBS))
   ocv_module_disable(cudaimgproc)
 endif()
 

modules/cudaoptflow/CMakeLists.txt

@@ -1,4 +1,4 @@
-if(IOS)
+if(IOS OR (NOT HAVE_CUDA AND NOT BUILD_CUDA_STUBS))
   ocv_module_disable(cudaoptflow)
 endif()
 

modules/cudastereo/CMakeLists.txt

@@ -1,4 +1,4 @@
-if(IOS)
+if(IOS OR (NOT HAVE_CUDA AND NOT BUILD_CUDA_STUBS))
   ocv_module_disable(cudastereo)
 endif()
 

modules/cudawarping/CMakeLists.txt

@@ -1,4 +1,4 @@
-if(IOS)
+if(IOS OR (NOT HAVE_CUDA AND NOT BUILD_CUDA_STUBS))
   ocv_module_disable(cudawarping)
 endif()