Building OpenCV 2.4.9 with CUDA Linking Problem

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Hello world,

I've been trying to build OpenCV 2.4.9 (SVN) with CUDA support for a few days on Ubuntu 12.10 (x64).

During the linking I have the following error: Linking CXX executable ../../bin/opencv_perf_gpu ../../lib/libopencv_gpu.so.2.4.9: undefined reference to « cuCtxGetCurrent »

I have no idea on how to fix this and it doesn't seem to be a frequent problem.

I tried various methods in various (if not all) combinations:

1. manually installing CUDA 5.0 using Nvidia's package for Ubuntu 11.10 x64
2. building CUDA 5.0 and OpenCV using both gcc (and g++) 4.6 and 4.7
3. installing the CUDA 4.2 dev and toolkit package provided by apt-get
4. trying changing the display drivers: 304.48, 310, 304.54 (from the CUDA 5.0 package)

Each time I made sure to have all the cuda libs detected by ldconfig. Though I'm still not sure which lib file is supposed to contain the function cuCtxGetCurrent...

Thank you in advance.