Merge remote-tracking branch 'upstream/3.4' into merge-3.4

Author: alalek

modules/core/src/ocl.cpp

@@ -153,6 +153,17 @@ static bool isRaiseError()
 }
 #endif
 
+static void onOpenCLKernelBuildError()
+{
+    // NB: no need to cache this value
+    bool value = cv::utils::getConfigurationParameterBool("OPENCV_OPENCL_ABORT_ON_BUILD_ERROR", false);
+    if (value)
+    {
+        fprintf(stderr, "Abort on OpenCL kernel build failure!\n");
+        abort();
+    }
+}
+
 #if CV_OPENCL_TRACE_CHECK
 static inline
 void traceOpenCLCheck(cl_int status, const char* message)
@@ -4593,6 +4604,12 @@ struct Program::Impl
                     CV_OCL_DBG_CHECK(clReleaseProgram(handle));
                     handle = NULL;
                 }
+                if (retval != CL_SUCCESS &&
+                    sourceName_ != "dummy"  // used for testing of compilation flags
+                )
+                {
+                    onOpenCLKernelBuildError();
+                }
             }
 #if CV_OPENCL_VALIDATE_BINARY_PROGRAMS
             if (handle && CV_OPENCL_VALIDATE_BINARY_PROGRAMS_VALUE)

samples/_winpack_run_python_sample.cmd

@@ -23,6 +23,8 @@ IF %ERRORLEVEL% EQU 0 (
   GOTO :PYTHON_FOUND
 )
 
+CALL :QUERY_PYTHON 3.10
+IF %ERRORLEVEL% EQU 0 GOTO :PYTHON_FOUND
 CALL :QUERY_PYTHON 3.9
 IF %ERRORLEVEL% EQU 0 GOTO :PYTHON_FOUND
 CALL :QUERY_PYTHON 3.8