Update with_cuda options

Initial patch from "Eric Sandeen <esandeen@redhat.com>"
See rhbz#1938054

opencv.spec

@@ -40,6 +40,12 @@
 
 %global srcname opencv
 
+# If _cuda_version is unset
+%if 0%{!?_cuda_version:1} && 0%{?with_cuda:1}
+%global _cuda_version 11.2
+%global _cuda_rpm_version 11-2
+%global _cuda_prefix /usr/local/cuda-%{_cuda_version}
+%endif
 
 Name:           opencv
 Version:        4.5.1
@@ -71,9 +77,10 @@ BuildRequires:  libtool
 BuildRequires:  cmake >= 2.6.3
 BuildRequires:  chrpath
 %{?with_cuda:
-BuildRequires:  pkgconfig(cublas-%{?_cuda_rpm_version})
-BuildRequires:  pkgconfig(cufft-%{?_cuda_rpm_version})
-BuildRequires:  pkgconfig(nppc-%{?_cuda_rpm_version})
+BuildRequires:  cuda-minimal-build-%{?_cuda_rpm_version}
+BuildRequires:  pkgconfig(cublas-%{?_cuda_version})
+BuildRequires:  pkgconfig(cufft-%{?_cuda_version})
+BuildRequires:  pkgconfig(nppc-%{?_cuda_version})
 }
 %{?with_eigen2:BuildRequires:  eigen2-devel}
 %{?with_eigen3:BuildRequires:  eigen3-devel}
@@ -293,6 +300,7 @@ install -pm 0644 %{SOURCE4} .cache/ade/
  -DCUDA_TOOLKIT_ROOT_DIR=%{?_cuda_prefix} \
  -DCUDA_VERBOSE_BUILD=ON \
  -DCUDA_PROPAGATE_HOST_FLAGS=OFF \
+ -DCUDA_NVCC_FLAGS="-Xcompiler -fPIC" \
  } \
  %{?with_openni: -DWITH_OPENNI=ON } \
  %{!?with_xine: -DWITH_XINE=OFF } \
@@ -424,6 +432,10 @@ ln -s -r %{buildroot}%{_jnidir}/opencv-%{javaver}.jar %{buildroot}%{_jnidir}/ope
 %{_libdir}/libopencv_bgsegm.so.%{abiver}*
 %{_libdir}/libopencv_bioinspired.so.%{abiver}*
 %{_libdir}/libopencv_ccalib.so.%{abiver}*
+%{?with_cuda:
+%{_libdir}/libopencv_cuda*.so.%{abiver}*
+%{_libdir}/libopencv_cudev.so.%{abiver}*
+}
 %{_libdir}/libopencv_cvv.so.%{abiver}*
 %{_libdir}/libopencv_datasets.so.%{abiver}*
 %{_libdir}/libopencv_dnn_objdetect.so.%{abiver}*