(cap_libv4l.cpp.o): undefined reference to symbol 'v4l2_munmap' /usr/lib/i386-linux-gnu/libv4l2.so.0: error adding symbols: DSO missing from command line collect2: error: ld returned 1 exit status modules/highgui/CMakeFiles/opencv_test_highgui.dir/build.make:346: recipe for target '...