build: eliminate GCC8 warnings

3rdparty/ittnotify/src/ittnotify/ittnotify_config.h

@@ -335,7 +335,7 @@ ITT_INLINE long __itt_interlocked_increment(volatile long* ptr)
 #ifdef SDL_STRNCPY_S
 #define __itt_fstrcpyn(s1, b, s2, l) SDL_STRNCPY_S(s1, b, s2, l)
 #else
-#define __itt_fstrcpyn(s1, b, s2, l) strncpy(s1, s2, l)
+#define __itt_fstrcpyn(s1, b, s2, l) strncpy(s1, s2, b)
 #endif /* SDL_STRNCPY_S */
 
 #define __itt_fstrdup(s)          strdup(s)

3rdparty/openexr/CMakeLists.txt

@@ -47,6 +47,10 @@ ocv_warnings_disable(CMAKE_CXX_FLAGS -Wshadow -Wunused -Wsign-compare -Wundef -W
                                      -Wsuggest-override -Winconsistent-missing-override
                                      -Wimplicit-fallthrough
 )
+if(CV_GCC AND CMAKE_CXX_COMPILER_VERSION VERSION_GREATER 8.0)
+  ocv_warnings_disable(CMAKE_CXX_FLAGS -Wclass-memaccess)
+endif()
+
 ocv_warnings_disable(CMAKE_CXX_FLAGS /wd4018 /wd4099 /wd4100 /wd4101 /wd4127 /wd4189 /wd4245 /wd4305 /wd4389 /wd4512 /wd4701 /wd4702 /wd4706 /wd4800) # vs2005
 ocv_warnings_disable(CMAKE_CXX_FLAGS /wd4334) # vs2005 Win64
 ocv_warnings_disable(CMAKE_CXX_FLAGS /wd4244) # vs2008

3rdparty/protobuf/CMakeLists.txt

@@ -29,6 +29,9 @@ if(CV_ICC)
       -wd265 -wd858 -wd873 -wd2196
   )
 endif()
+if(CV_GCC AND CMAKE_CXX_COMPILER_VERSION VERSION_GREATER 8.0)
+  ocv_warnings_disable(CMAKE_CXX_FLAGS -Wclass-memaccess)
+endif()
 
 # Easier to support different versions of protobufs
 function(append_if_exist OUTPUT_LIST)

apps/createsamples/utility.cpp

@@ -54,6 +54,10 @@
 #include "opencv2/highgui.hpp"
 #include "opencv2/calib3d.hpp"
 
+#if defined __GNUC__ && __GNUC__ >= 8
+#pragma GCC diagnostic ignored "-Wclass-memaccess"
+#endif
+
 using namespace cv;
 
 #ifndef PATH_MAX

modules/calib3d/src/calibration.cpp

@@ -3159,6 +3159,10 @@ static void collectCalibrationData( InputArrayOfArrays objectPoints,
     Point3f* objPtData = objPtMat.ptr<Point3f>();
     Point2f* imgPtData1 = imgPtMat1.ptr<Point2f>();
 
+#if defined __GNUC__ && __GNUC__ >= 8
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wclass-memaccess"
+#endif
     for( i = 0; i < nimages; i++, j += ni )
     {
         Mat objpt = objectPoints.getMat(i);
@@ -3176,6 +3180,9 @@ static void collectCalibrationData( InputArrayOfArrays objectPoints,
             memcpy( imgPtData2 + j, imgpt2.ptr(), ni*sizeof(imgPtData2[0]) );
         }
     }
+#if defined __GNUC__ && __GNUC__ >= 8
+#pragma GCC diagnostic pop
+#endif
 }
 
 static Mat prepareCameraMatrix(Mat& cameraMatrix0, int rtype)

modules/calib3d/test/test_cameracalibration_badarg.cpp

@@ -489,7 +489,14 @@ protected:
     void run(int /* start_from */ )
     {
         CvMat zeros;
+#if defined __GNUC__ && __GNUC__ >= 8
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wclass-memaccess"
+#endif
         memset(&zeros, 0, sizeof(zeros));
+#if defined __GNUC__ && __GNUC__ >= 8
+#pragma GCC diagnostic pop
+#endif
 
         C_Caller caller, bad_caller;
         CvMat objectPoints_c, r_vec_c, t_vec_c, A_c, distCoeffs_c, imagePoints_c,

modules/core/src/array.cpp

@@ -2916,12 +2916,29 @@ cvInitImageHeader( IplImage * image, CvSize size, int depth,
     if( !image )
         CV_Error( CV_HeaderIsNull, "null pointer to header" );
 
+#if defined __GNUC__ && __GNUC__ >= 8
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wclass-memaccess"
+#endif
     memset( image, 0, sizeof( *image ));
+#if defined __GNUC__ && __GNUC__ >= 8
+#pragma GCC diagnostic pop
+#endif
     image->nSize = sizeof( *image );
 
     icvGetColorModel( channels, &colorModel, &channelSeq );
-    strncpy( image->colorModel, colorModel, 4 );
-    strncpy( image->channelSeq, channelSeq, 4 );
+    for (int i = 0; i < 4; i++)
+    {
+        image->colorModel[i] = colorModel[i];
+        if (colorModel[i] == 0)
+            break;
+    }
+    for (int i = 0; i < 4; i++)
+    {
+        image->channelSeq[i] = channelSeq[i];
+        if (channelSeq[i] == 0)
+            break;
+    }
 
     if( size.width < 0 || size.height < 0 )
         CV_Error( CV_BadROISize, "Bad input roi" );

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,

modules/imgproc/test/test_moments.cpp

@@ -186,7 +186,14 @@ void CV_MomentsTest::prepare_to_validation( int /*test_case_idx*/ )
     int i, y, x, cols = src.cols;
     double xc = 0., yc = 0.;
 
+#if defined __GNUC__ && __GNUC__ >= 8
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wclass-memaccess"
+#endif
     memset( &m, 0, sizeof(m));
+#if defined __GNUC__ && __GNUC__ >= 8
+#pragma GCC diagnostic pop
+#endif
 
     int coi = 0;
     for( y = 0; y < src.rows; y++ )

modules/objdetect/src/haar.cpp

@@ -67,6 +67,11 @@
 #  endif
 #endif
 
+#if defined __GNUC__ && __GNUC__ >= 8
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wclass-memaccess"
+#endif
+
 /* these settings affect the quality of detection: change with care */
 #define CV_ADJUST_FEATURES 1
 #define CV_ADJUST_WEIGHTS  0
@@ -2290,4 +2295,8 @@ CvType haar_type( CV_TYPE_NAME_HAAR, icvIsHaarClassifier,
                   icvReadHaarClassifier, icvWriteHaarClassifier,
                   icvCloneHaarClassifier );
 
+#if defined __GNUC__ && __GNUC__ >= 8
+#pragma GCC diagnostic pop
+#endif
+
 /* End of file. */