core(ocl): add option to abort on OpenCL kernel build failure

- exceptions are catched by fallback CPU path
- OPENCV_OPENCL_ABORT_ON_BUILD_ERROR (disabled by default)

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)
@@ -3881,6 +3892,12 @@ 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)