install failed log of opencv

cmake_error

[ 67%] Building CXX object modules/gpu/CMakeFiles/opencv_test_gpu.dir/test/test_core.cpp.o
[ 67%] Building CXX object modules/gpu/CMakeFiles/opencv_test_gpu.dir/test/test_warp_affine.cpp.o
[ 67%] Building CXX object modules/gpu/CMakeFiles/opencv_test_gpu.dir/test/test_resize.cpp.o
[ 67%] Building CXX object modules/gpu/CMakeFiles/opencv_test_gpu.dir/test/test_remap.cpp.o
[ 67%] Building CXX object modules/gpu/CMakeFiles/opencv_test_gpu.dir/test/test_hough.cpp.o
Linking CXX executable ../../bin/opencv_test_gpu
[ 67%] Built target opencv_test_gpu
[ 67%] Generating opencv_ocl_pch_dephelp.cxx
Scanning dependencies of target opencv_ocl_pch_dephelp
[ 67%] Building CXX object modules/ocl/CMakeFiles/opencv_ocl_pch_dephelp.dir/opencv_ocl_pch_dephelp.cxx.o
Linking CXX static library ../../lib/libopencv_ocl_pch_dephelp.a
[ 67%] Built target opencv_ocl_pch_dephelp
Scanning dependencies of target pch_Generate_opencv_ocl
[ 67%] Generating precomp.hpp
[ 67%] Generating precomp.hpp.gch/opencv_ocl_RELEASE.gch
[ 68%] Built target pch_Generate_opencv_ocl
[ 68%] Generating opencl_kernels.cpp, opencl_kernels.hpp
CMake Error at /home/vagrant/opencv-2.4.9/cmake/cl2cpp.cmake:50 (string):
  string does not recognize sub-command MD5


make[2]: *** [modules/ocl/opencl_kernels.cpp] Error 1
make[1]: *** [modules/ocl/CMakeFiles/opencv_ocl.dir/all] Error 2
make: *** [all] Error 2