Merge pull request #11986 from alalek:build_eliminate_gcc8_warnings

modules/imgproc/src/contours.cpp

@@ -209,7 +209,14 @@ cvStartFindContours_Impl( void* _img, CvMemStorage* storage,
         CV_Error( CV_StsBadSize, "" );
 
     CvContourScanner scanner = (CvContourScanner)cvAlloc( sizeof( *scanner ));
+#if defined __GNUC__ && __GNUC__ >= 8
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wclass-memaccess"
+#endif
     memset( scanner, 0, sizeof(*scanner) );
+#if defined __GNUC__ && __GNUC__ >= 8
+#pragma GCC diagnostic pop
+#endif
 
     scanner->storage1 = scanner->storage2 = storage;
     scanner->img0 = (schar *) img;

modules/imgproc/src/drawing.cpp

@@ -2564,6 +2564,11 @@ static const int CodeDeltas[8][2] =
 #define CV_ADJUST_EDGE_COUNT( count, seq )  \
     ((count) -= ((count) == (seq)->total && !CV_IS_SEQ_CLOSED(seq)))
 
+#if defined __GNUC__ && __GNUC__ >= 8
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wclass-memaccess"
+#endif
+
 CV_IMPL void
 cvDrawContours( void* _img, CvSeq* contour,
                 CvScalar _externalColor, CvScalar _holeColor,
@@ -2895,4 +2900,8 @@ cvGetTextSize( const char *text, const CvFont *_font, CvSize *_size, int *_base_
         *_size = size;
 }
 
+#if defined __GNUC__ && __GNUC__ >= 8
+#pragma GCC diagnostic pop // "-Wclass-memaccess"
+#endif
+
 /* End of file. */

modules/imgproc/src/floodfill.cpp

@@ -642,8 +642,15 @@ cvFloodFill( CvArr* arr, CvPoint seed_point,
              CvScalar newVal, CvScalar lo_diff, CvScalar up_diff,
              CvConnectedComp* comp, int flags, CvArr* maskarr )
 {
+#if defined __GNUC__ && __GNUC__ >= 8
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wclass-memaccess"
+#endif
     if( comp )
         memset( comp, 0, sizeof(*comp) );
+#if defined __GNUC__ && __GNUC__ >= 8
+#pragma GCC diagnostic pop
+#endif
 
     cv::Mat img = cv::cvarrToMat(arr), mask = cv::cvarrToMat(maskarr);
     int area = cv::floodFill(img, mask, seed_point, newVal,