fixed some warnings and errors under g++

modules/gpu/include/opencv2/gpu/gpu.hpp

@@ -99,8 +99,8 @@ namespace cv
 
             string name() const { return name_; }
 
-            int major() const { return major_; }
-            int minor() const { return minor_; }
+            int majorVersion() const { return majorVersion_; }
+            int minorVersion() const { return minorVersion_; }
 
             int multiProcessorCount() const { return multi_processor_count_; }
 
@@ -118,7 +118,8 @@ namespace cv
 
             string name_;
             int multi_processor_count_;
-            int major_, minor_;
+            int majorVersion_;
+            int minorVersion_;
         };
 
         //////////////////////////////// Error handling ////////////////////////

modules/gpu/src/imgproc_gpu.cpp

@@ -1258,7 +1258,7 @@ Size cv::gpu::ConvolveBuf::estimateBlockSize(Size result_size, Size templ_size)
     Size bsize_min(1024, 1024);
 
     // Check whether we use Fermi generation or newer GPU
-    if (DeviceInfo().major() >= 2) 
+    if (DeviceInfo().majorVersion() >= 2)
     {
         bsize_min.width = 2048;
         bsize_min.height = 2048;
@@ -1295,7 +1295,6 @@ void cv::gpu::convolve(const GpuMat& image, const GpuMat& templ, GpuMat& result,
 
     Size& block_size = buf.block_size;
     Size& dft_size = buf.dft_size;
-    int& spect_len = buf.spect_len;
 
     GpuMat& image_block = buf.image_block;
     GpuMat& templ_block = buf.templ_block;

modules/gpu/src/initialization.cpp

@@ -175,23 +175,20 @@ size_t cv::gpu::DeviceInfo::totalMemory() const
 
 bool cv::gpu::DeviceInfo::has(cv::gpu::GpuFeature feature) const
 {
-    if (feature == NATIVE_DOUBLE)
-        return major() > 1 || (major() == 1 && minor() >= 3);
-    if (feature == ATOMICS)
-        return major() > 1 || (major() == 1 && minor() >= 1);
-    return false;
+    int version = majorVersion() * 10 + minorVersion();
+    return version >= feature;
 }
 
 
 bool cv::gpu::DeviceInfo::isCompatible() const
 {
     // Check PTX compatibility
-    if (TargetArchs::hasEqualOrLessPtx(major(), minor()))
+    if (TargetArchs::hasEqualOrLessPtx(majorVersion(), minorVersion()))
         return true;
 
     // Check BIN compatibility
-    for (int i = minor(); i >= 0; --i)
-        if (TargetArchs::hasBin(major(), i))
+    for (int i = minorVersion(); i >= 0; --i)
+        if (TargetArchs::hasBin(majorVersion(), i))
             return true;
 
     return false;
@@ -204,8 +201,8 @@ void cv::gpu::DeviceInfo::query()
     cudaSafeCall(cudaGetDeviceProperties(&prop, device_id_));
     name_ = prop.name;
     multi_processor_count_ = prop.multiProcessorCount;
-    major_ = prop.major;
-    minor_ = prop.minor;
+    majorVersion_ = prop.major;
+    minorVersion_ = prop.minor;
 }
 
 

modules/gpu/src/stereobm.cpp

@@ -88,7 +88,7 @@ bool cv::gpu::StereoBM_GPU::checkIfGpuCallReasonable()
 
     DeviceInfo device_info;
 
-    if (device_info.major() > 1 || device_info.multiProcessorCount() > 16)
+    if (device_info.majorVersion() > 1 || device_info.multiProcessorCount() > 16)
         return true;
 
     return false;

samples/gpu/multi.cpp

@@ -59,9 +59,12 @@ int main()
 
     for (int i = 0; i < num_devices; ++i)
     {
-        if (!DeviceInfo(i).isCompatible())
+        DeviceInfo dev_info(i);
+        if (!dev_info.isCompatible())
         {
-            cout << "GPU module isn't built for GPU #" << i << " (" << DeviceInfo(i).name() << ")";
+            cout << "GPU module isn't built for GPU #" << i << " ("
+                 << dev_info.name() << ", CC " << dev_info.majorVersion()
+                 << dev_info.minorVersion() << "\n";
             return -1;
         }
     }

samples/gpu/stereo_multi.cpp

@@ -84,9 +84,12 @@ int main(int argc, char** argv)
 
     for (int i = 0; i < num_devices; ++i)
     {
-        if (!DeviceInfo(i).isCompatible())
+        DeviceInfo dev_info(i);
+        if (!dev_info.isCompatible())
         {
-            cout << "GPU module isn't built for GPU #" << i << " (" << DeviceInfo(i).name() << ")";
+            cout << "GPU module isn't built for GPU #" << i << " ("
+                 << dev_info.name() << ", CC " << dev_info.majorVersion()
+                 << dev_info.minorVersion() << "\n";
             return -1;
         }
     }

tests/gpu/src/meanshift.cpp

@@ -56,7 +56,8 @@ struct CV_GpuMeanShiftTest : public CvTest
         cv::Mat img = cv::imread(std::string(ts->get_data_path()) + "meanshift/cones.png");
         cv::Mat img_template;       
         
-        if (cv::gpu::TargetArchs::builtWith(cv::gpu::COMPUTE_20) && cv::gpu::DeviceInfo().major() >= 2)
+        if (cv::gpu::TargetArchs::builtWith(cv::gpu::COMPUTE_20) &&
+            cv::gpu::DeviceInfo().has(cv::gpu::COMPUTE_20))
             img_template = cv::imread(std::string(ts->get_data_path()) + "meanshift/con_result.png");
         else
             img_template = cv::imread(std::string(ts->get_data_path()) + "meanshift/con_result_CC1X.png");
@@ -199,7 +200,8 @@ struct CV_GpuMeanShiftProcTest : public CvTest
             cv::Mat spmap_template;
             cv::FileStorage fs;
 
-            if (cv::gpu::TargetArchs::builtWith(cv::gpu::COMPUTE_20) && cv::gpu::DeviceInfo().major() >= 2)
+            if (cv::gpu::TargetArchs::builtWith(cv::gpu::COMPUTE_20) &&
+                cv::gpu::DeviceInfo().has(cv::gpu::COMPUTE_20))
                 fs.open(std::string(ts->get_data_path()) + "meanshift/spmap.yaml", cv::FileStorage::READ);
             else
                 fs.open(std::string(ts->get_data_path()) + "meanshift/spmap_CC1X.yaml", cv::FileStorage::READ);

tests/gpu/src/mssegmentation.cpp

@@ -69,7 +69,7 @@ struct CV_GpuMeanShiftSegmentationTest : public CvTest {
             {
                 stringstream path;
                 path << ts->get_data_path() << "meanshift/cones_segmented_sp10_sr10_minsize" << minsize;
-                if (TargetArchs::builtWith(COMPUTE_20) && DeviceInfo().major() >= 2)
+                if (TargetArchs::builtWith(COMPUTE_20) && DeviceInfo().has(COMPUTE_20))
                     path << ".png";
                 else
                     path << "_CC1X.png";