ocl: correct disabling of OpenCL code

modules/core/src/mathfuncs.cpp

@@ -1364,10 +1364,16 @@ void pow( InputArray _src, double power, OutputArray _dst )
 {
     int type = _src.type(), depth = CV_MAT_DEPTH(type),
             cn = CV_MAT_CN(type), ipower = cvRound(power);
-    bool is_ipower = fabs(ipower - power) < DBL_EPSILON,
-            useOpenCL = _dst.isUMat() && _src.dims() <= 2;
+    bool is_ipower = fabs(ipower - power) < DBL_EPSILON;
+#ifdef HAVE_OPENCL
+    bool useOpenCL = _dst.isUMat() && _src.dims() <= 2;
+#endif
 
-    if( is_ipower && !(ocl::Device::getDefault().isIntel() && useOpenCL && depth != CV_64F))
+    if( is_ipower
+#ifdef HAVE_OPENCL
+            && !(useOpenCL && ocl::Device::getDefault().isIntel() && depth != CV_64F)
+#endif
+      )
     {
         switch( ipower )
         {

modules/core/src/precomp.hpp

@@ -54,7 +54,9 @@
 
 #include "opencv2/core/private.hpp"
 #include "opencv2/core/private.cuda.hpp"
+#ifdef HAVE_OPENCL
 #include "opencv2/core/ocl.hpp"
+#endif
 
 #include "opencv2/hal.hpp"
 
@@ -262,7 +264,11 @@ struct ImplCollector
 
 struct CoreTLSData
 {
-    CoreTLSData() : device(0), useOpenCL(-1), useIPP(-1)
+    CoreTLSData() :
+#ifdef HAVE_OPENCL
+        device(0), useOpenCL(-1),
+#endif
+        useIPP(-1)
     {
 #ifdef HAVE_TEGRA_OPTIMIZATION
         useTegra = -1;
@@ -270,9 +276,11 @@ struct CoreTLSData
     }
 
     RNG rng;
+#ifdef HAVE_OPENCL
     int device;
     ocl::Queue oclQueue;
     int useOpenCL; // 1 - use, 0 - do not use, -1 - auto/not initialized
+#endif
     int useIPP; // 1 - use, 0 - do not use, -1 - auto/not initialized
 #ifdef HAVE_TEGRA_OPTIMIZATION
     int useTegra; // 1 - use, 0 - do not use, -1 - auto/not initialized

modules/core/src/system.cpp

@@ -405,7 +405,9 @@ void setUseOptimized( bool flag )
     USE_SSE2 = currentFeatures->have[CV_CPU_SSE2];
 
     ipp::setUseIPP(flag);
+#ifdef HAVE_OPENCL
     ocl::setUseOpenCL(flag);
+#endif
 #ifdef HAVE_TEGRA_OPTIMIZATION
     ::tegra::setUseTegra(flag);
 #endif

modules/core/test/test_umat.cpp

@@ -691,6 +691,7 @@ INSTANTIATE_TEST_CASE_P(UMat, getUMat, Combine(
 
 ///////////////////////////////////////////////////////////////// OpenCL ////////////////////////////////////////////////////////////////////////////
 
+#ifdef HAVE_OPENCL
 TEST(UMat, BufferPoolGrowing)
 {
 #ifdef _DEBUG
@@ -716,6 +717,7 @@ TEST(UMat, BufferPoolGrowing)
     else
         std::cout << "Skipped, no OpenCL" << std::endl;
 }
+#endif
 
 class CV_UMatTest :
         public cvtest::BaseTest
@@ -956,6 +958,10 @@ TEST(UMat, CopyToIfDeviceCopyIsObsolete)
 
 TEST(UMat, setOpenCL)
 {
+#ifndef HAVE_OPENCL
+    return; // test skipped
+#endif
+
     // save the current state
     bool useOCL = cv::ocl::useOpenCL();