added check into opencv_test_gpu: whether OpenCV was compiled with CUDA or not

modules/gpu/test/test_main.cpp

 #include "test_precomp.hpp"
 
-CV_TEST_MAIN("gpu")
-
-// Run test with --gtest_catch_exceptions flag to avoid runtime errors in 
-// the case when there is no GPU
+int main(int argc, char **argv)
+{
+    cvtest::TS::ptr()->init("gpu");
+    ::testing::InitGoogleTest(&argc, argv);
+#ifdef HAVE_CUDA
+    return RUN_ALL_TESTS();
+#else
+    std::cerr << "opencv_test_gpu: OpenCV was compiled without GPU support\n";
+    return -1;
+#endif
+}
\ No newline at end of file

modules/gpu/test/test_meanshift.cpp

@@ -125,11 +125,7 @@ struct CV_GpuMeanShiftTest : public cvtest::BaseTest
 
 };
 
-/////////////////////////////////////////////////////////////////////////////
-/////////////////// tests registration  /////////////////////////////////////
-/////////////////////////////////////////////////////////////////////////////
-
-CV_GpuMeanShiftTest CV_GpuMeanShift_test;
+TEST(meanShift, accuracy) { CV_GpuMeanShiftTest test; test.safe_run(); }
 
 struct CV_GpuMeanShiftProcTest : public cvtest::BaseTest
 {

modules/gpu/test/test_precomp.hpp

@@ -2,6 +2,7 @@
 #define __OPENCV_TEST_PRECOMP_HPP__
 
 #include <limits>
+#include <cvconfig.h>
 #include "opencv2/core/core.hpp"
 #include "opencv2/highgui/highgui.hpp"
 #include "opencv2/calib3d/calib3d.hpp"