Remove gcd function from core headers

modules/core/include/opencv2/core/operations.hpp

@@ -1036,18 +1036,7 @@ inline FileNode FileStorage::getFirstTopLevelNode() const
 
 //////////////////////////////////////// Various algorithms ////////////////////////////////////
 
-template<typename _Tp> static inline _Tp gcd(_Tp a, _Tp b)
-{
-    if( a < b )
-        std::swap(a, b);
-    while( b > 0 )
-    {
-        _Tp r = a % b;
-        a = b;
-        b = r;
-    }
-    return a;
-}
+
 
 // This function splits the input sequence or set into one or more equivalence classes and
 // returns the vector of labels - 0-based class indexes for each element.

modules/objdetect/src/hog.cpp

@@ -1015,6 +1015,19 @@ Rect HOGCache::getWindow(const Size& imageSize, const Size& winStride, int idx)
     return Rect( x*winStride.width, y*winStride.height, winSize.width, winSize.height );
 }
 
+static inline int gcd(int a, int b)
+{
+    if( a < b )
+        std::swap(a, b);
+    while( b > 0 )
+    {
+        int r = a % b;
+        a = b;
+        b = r;
+    }
+    return a;
+}
+
 void HOGDescriptor::compute(const Mat& img, std::vector<float>& descriptors,
     Size winStride, Size padding, const std::vector<Point>& locations) const
 {

modules/objdetect/test/test_cascadeandhog.cpp

@@ -995,6 +995,8 @@ inline bool HOGDescriptorTester::is_failed() const
     return failed;
 }
 
+static inline int gcd(int a, int b) { return (a % b == 0) ? b : gcd (b, a % b); }
+
 void HOGDescriptorTester::detect(const Mat& img,
     vector<Point>& hits, vector<double>& weights, double hitThreshold,
     Size winStride, Size padding, const vector<Point>& locations) const