fixed gcc and clang warnings

modules/ximgproc/perf/perf_precomp.hpp

 #ifndef __OPENCV_PERF_PRECOMP_HPP__
 #define __OPENCV_PERF_PRECOMP_HPP__
 
+#ifdef __GNUC__
+#  pragma GCC diagnostic ignored "-Wmissing-declarations"
+#  if defined __clang__ || defined __APPLE__
+#    pragma GCC diagnostic ignored "-Wmissing-prototypes"
+#    pragma GCC diagnostic ignored "-Wextra"
+#  endif
+#endif
+
 #include <opencv2/ts.hpp>
 #include <opencv2/imgproc.hpp>
 #include <opencv2/highgui.hpp>
-
 #include <opencv2/ximgproc.hpp>
 
 #endif

modules/ximgproc/src/guided_filter.cpp

@@ -214,7 +214,7 @@ private: /*Parallel body classes*/
         vector<Mat> &srcCn;
 
         MulChannelsGuideAndSrc_ParBody(GuidedFilterImpl& gf_, vector<Mat>& srcCn_, vector<vector<Mat> >& cov_)
-            : gf(gf_), srcCn(srcCn_), cov(cov_) {}
+            : gf(gf_), cov(cov_), srcCn(srcCn_) {}
 
         void operator () (const Range& range) const;
     };
@@ -226,7 +226,7 @@ private: /*Parallel body classes*/
         vector<Mat> &srcCnMean;
 
         ComputeCovFromSrcChannelsMul_ParBody(GuidedFilterImpl& gf_, vector<Mat>& srcCnMean_, vector<vector<Mat> >& cov_)
-            : gf(gf_), srcCnMean(srcCnMean_), cov(cov_) {}
+            : gf(gf_), cov(cov_), srcCnMean(srcCnMean_) {}
 
         void operator () (const Range& range) const;
     };

modules/ximgproc/test/test_adaptive_manifold_ref_impl.cpp

@@ -756,9 +756,9 @@ namespace
             }
 
             dst.setTo(0.0);
-            for (int i = 0; i < X.rows; ++i)
+            for (int k = 0; k < X.rows; ++k)
             {
-                const float* t_row = buf.t[i];
+                const float* t_row = buf.t[k];
 
                 for (int c = 0; c < X.cols; ++c)
                 {

modules/ximgproc/test/test_guided_filter.cpp

@@ -70,7 +70,7 @@ static Mat convertTypeAndSize(Mat src, int dstType, Size dstSize)
 
 class GuidedFilterRefImpl : public GuidedFilter
 {
-    int rad, height, width, chNum;
+    int height, width, rad, chNum;
     Mat det;
     Mat *channels, *exps, **vars, **A;
     double eps;
@@ -104,7 +104,7 @@ void GuidedFilterRefImpl::meanFilter(const Mat &src, Mat & dst)
 }
 
 GuidedFilterRefImpl::GuidedFilterRefImpl(InputArray _guide, int _rad, double _eps) :
-  height(_guide.rows()), width(_guide.cols()), chNum(_guide.channels()), rad(_rad), eps(_eps)
+  height(_guide.rows()), width(_guide.cols()), rad(_rad), chNum(_guide.channels()), eps(_eps)
 {
     Mat guide = _guide.getMat();
     CV_Assert(chNum > 0 && chNum <= 3);

modules/ximgproc/test/test_joint_bilateral_filter.cpp

@@ -55,6 +55,8 @@ static Mat convertTypeAndSize(Mat src, int dstType, Size dstSize)
 //////////////////////////////////////////////////////////////////////////
 //////////////////////////////////////////////////////////////////////////
 
+void jointBilateralFilterNaive(InputArray joint, InputArray src, OutputArray dst, int d, double sigmaColor, double sigmaSpace, int borderType = BORDER_DEFAULT);
+
 typedef Vec<float, 1> Vec1f;
 typedef Vec<uchar, 1> Vec1b;
 
@@ -130,7 +132,7 @@ void jointBilateralFilterNaive_(InputArray joint_, InputArray src_, OutputArray
     }
 }
 
-void jointBilateralFilterNaive(InputArray joint, InputArray src, OutputArray dst, int d, double sigmaColor, double sigmaSpace, int borderType = BORDER_DEFAULT)
+void jointBilateralFilterNaive(InputArray joint, InputArray src, OutputArray dst, int d, double sigmaColor, double sigmaSpace, int borderType)
 {
     CV_Assert(src.size() == joint.size() && src.depth() == joint.depth());
     CV_Assert(src.type() == CV_32FC1 || src.type() == CV_32FC3 || src.type() == CV_8UC1 || src.type() == CV_8UC3);

modules/ximgproc/test/test_precomp.hpp

 #ifndef __OPENCV_TEST_PRECOMP_HPP__
 #define __OPENCV_TEST_PRECOMP_HPP__
 
+#ifdef __GNUC__
+#  pragma GCC diagnostic ignored "-Wmissing-declarations"
+#  if defined __clang__ || defined __APPLE__
+#    pragma GCC diagnostic ignored "-Wmissing-prototypes"
+#    pragma GCC diagnostic ignored "-Wextra"
+#  endif
+#endif
+
 #include <opencv2/ts.hpp>
 #include <opencv2/ts/ts_perf.hpp>
 #include <opencv2/core.hpp>
 #include <opencv2/core/utility.hpp>
 #include <opencv2/imgproc.hpp>
 #include <opencv2/highgui.hpp>
-
 #include <opencv2/ximgproc.hpp>
 
 #endif
\ No newline at end of file