From 1b1246cbae9b7de484c125907b4013536545de41 Mon Sep 17 00:00:00 2001
From: Alexander Alekhin <alexander.alekhin@itseez.com>
Date: Mon, 24 Aug 2015 13:40:10 +0300
Subject: [PATCH] samples: fix OpenCL detection / build warning

---
 samples/opencl/CMakeLists.txt            | 6 +++++-
 samples/opencl/opencl-opencv-interop.cpp | 2 ++
 2 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/samples/opencl/CMakeLists.txt b/samples/opencl/CMakeLists.txt
index a4525650e1..6b247e3e75 100644
--- a/samples/opencl/CMakeLists.txt
+++ b/samples/opencl/CMakeLists.txt
@@ -18,7 +18,11 @@ ocv_check_dependencies(${OPENCV_OPENCL_SAMPLES_REQUIRED_DEPS})
 
 if(BUILD_EXAMPLES AND OCV_DEPENDENCIES_FOUND)
 
-  find_package(OpenCL 1.2 REQUIRED)
+  find_package(OpenCL 1.2 QUIET)
+  if(NOT OpenCL_FOUND)
+    message(STATUS "OpenCL samples are skipped: OpenCL SDK is required")
+    return()
+  endif()
 
   set(project "opencl")
   string(TOUPPER "${project}" project_upper)
diff --git a/samples/opencl/opencl-opencv-interop.cpp b/samples/opencl/opencl-opencv-interop.cpp
index 8deb799eea..5d5d52e02b 100644
--- a/samples/opencl/opencl-opencv-interop.cpp
+++ b/samples/opencl/opencl-opencv-interop.cpp
@@ -14,6 +14,8 @@
 #include <iomanip>
 #include <stdexcept>
 
+#define CL_USE_DEPRECATED_OPENCL_2_0_APIS // eliminate build warning
+
 #if __APPLE__
 #include <OpenCL/cl.h>
 #else