Linking issues with opencv_perf_ocl - Cannot find 'dlopen' and 'dlsym' in libopencv_ocl.so

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Hi,

I am new to this and I was cross compiling openCV in Ubuntu after following "Installing OpenCV on ARM board.doc". After 71% completion, I get the following. ... [ 71%] Built target pch_Generate_opencv_perf_ocl Linking CXX executable ../../bin/opencv_perf_ocl ../../lib/libopencv_ocl.so: undefined reference to dlopen' ../../lib/libopencv_ocl.so: undefined reference todlsym' collect2: error: ld returned 1 exit status make[2]: * [bin/opencv_perf_ocl] Error 1 make[1]: [modules/ocl/CMakeFiles/opencv_perf_ocl.dir/all] Error 2 make: ** [all] Error 2

What could be going wrong here?