Building OpenCV, the cmake output is
General configuration for OpenCV 2.4.11 ===================================== Version control: unknown
Platform:
Host: Linux 3.13.0-79-generic x86_64
CMake: 2.8.7
CMake generator: Unix Makefiles
CMake build tool: /usr/bin/make
Configuration: RELEASE
C/C++:
Built as dynamic libs?: YES
C++ Compiler: /usr/bin/c++ (ver 4.6)
C++ flags (Release): -fsigned-char -W -Wall -Werror=return-type -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wundef -Winit-self -Wpointer-arith -Wshadow -Wsign-promo -fdiagnostics-show-option -Wno-long-long -pthread -fomit-frame-pointer -ffast-math -msse -msse2 -msse3 -ffunction-sections -O3 -DNDEBUG -DNDEBUG
C++ flags (Debug): -fsigned-char -W -Wall -Werror=return-type -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wundef -Winit-self -Wpointer-arith -Wshadow -Wsign-promo -fdiagnostics-show-option -Wno-long-long -pthread -fomit-frame-pointer -ffast-math -msse -msse2 -msse3 -ffunction-sections -g -O0 -DDEBUG -D_DEBUG
C Compiler: /usr/bin/gcc
C flags (Release): -fsigned-char -W -Wall -Werror=return-type -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wmissing-prototypes -Wstrict-prototypes -Wundef -Winit-self -Wpointer-arith -Wshadow -fdiagnostics-show-option -Wno-long-long -pthread -fomit-frame-pointer -ffast-math -msse -msse2 -msse3 -ffunction-sections -O3 -DNDEBUG -DNDEBUG
C flags (Debug): -fsigned-char -W -Wall -Werror=return-type -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wmissing-prototypes -Wstrict-prototypes -Wundef -Winit-self -Wpointer-arith -Wshadow -fdiagnostics-show-option -Wno-long-long -pthread -fomit-frame-pointer -ffast-math -msse -msse2 -msse3 -ffunction-sections -g -O0 -DDEBUG -D_DEBUG
Linker flags (Release):
Linker flags (Debug):
Precompiled headers: YES
OpenCV modules:
To be built: core flann imgproc highgui features2d calib3d ml video legacy objdetect photo gpu ocl nonfree contrib python stitching superres ts videostab
Disabled: world
Disabled by dependency: -
Unavailable: androidcamera dynamicuda java viz
GUI:
QT 4.x: YES (ver 4.8.1 EDITION = OpenSource)
QT OpenGL support: YES (/usr/lib/x86_64-linux-gnu/libQtOpenGL.so)
OpenGL support: YES (/usr/lib/libGLU.so /usr/lib/x86_64-linux-gnu/libGL.so /usr/lib/x86_64-linux-gnu/libSM.so /usr/lib/x86_64-linux-gnu/libICE.so /usr/lib/libX11.so /usr/lib/x86_64-linux-gnu/libXext.so)
VTK support: NO
Media I/O:
ZLib: /usr/lib/x86_64-linux-gnu/libz.so (ver 1.2.3.4)
JPEG: /usr/lib/x86_64-linux-gnu/libjpeg.so (ver )
PNG: /usr/lib/x86_64-linux-gnu/libpng.so (ver 1.2.46)
TIFF: /usr/lib/x86_64-linux-gnu/libtiff.so (ver 42 - 3.9.5)
JPEG 2000: /usr/lib/x86_64-linux-gnu/libjasper.so (ver 1.900.1)
OpenEXR: build (ver 1.7.1)
Video I/O:
DC1394 1.x: NO
DC1394 2.x: YES (ver 2.2.0)
FFMPEG: YES
codec: YES (ver 53.35.0)
format: YES (ver 53.21.1)
util: YES (ver 51.22.3)
swscale: YES (ver 2.1.0)
gentoo-style: YES
GStreamer: NO
OpenNI: NO
OpenNI PrimeSensor Modules: NO
PvAPI: NO
GigEVisionSDK: NO
UniCap: NO
UniCap ucil: NO
V4L/V4L2: NO/YES
XIMEA: NO
Xine: NO
Other third-party libraries:
Use IPP: NO
Use Eigen: NO
Use TBB: YES (ver 4.0 interface 6000)
Use OpenMP: NO
Use GCD NO
Use Concurrency NO
Use C=: NO
Use Cuda: YES (ver 5.5)
Use OpenCL: YES
NVIDIA CUDA
Use CUFFT: YES
Use CUBLAS: YES
USE NVCUVID: NO
NVIDIA GPU arch: 11 12 13 20 21 30 35
NVIDIA PTX archs: 30
Use fast math: YES
OpenCL:
Version: dynamic
Include path: /home/ubu1204/Documents/Software/opencv-2.4.11/3rdparty/include/opencl/1.2
Use AMD FFT: NO
Use AMD BLAS: NO
Python:
Interpreter: /usr/bin/python (ver 2.7.3)
Libraries: /usr/lib/libpython2.7.so
numpy: /usr/lib/python2.7/dist-packages/numpy/core/include (ver 1.6.1)
packages path: lib/python2.7/dist-packages
Java:
ant: NO
JNI: NO
Java tests: NO
Documentation:
Build Documentation: NO
Sphinx: NO
PdfLaTeX compiler: NO
Doxygen: NO
Tests and samples:
Tests: YES
Performance tests: YES
C/C++ Examples: YES
Install path: /usr/local
cvconfig.h is in: /home/ubu1204/Documents/Software/opencv-2.4.11/release
However, calling gpu::getCudaEnableDeviceCount() returns me 0. I'm running on Ubuntu 12.04 LTS with OpenCV 2.4.11. Can anyone tell me what is wrong?