顔認識をもっと使い始める予定なので、dlibをインストールしてみました。私は指示に従いました：
cd examples
mkdir build
cd build
cmake ..
cmake --build . --config Release
そして、失敗したのは最後のものだけでした。99% 完了するまで問題なく動作し、その後:
Scanning dependencies of target train_shape_predictor_ex
[ 96%] Building CXX object CMakeFiles/train_shape_predictor_ex.dir/train_shape_predictor_ex.cpp.o
[ 96%] Linking CXX executable train_shape_predictor_ex
[ 96%] Built target train_shape_predictor_ex
Scanning dependencies of target using_custom_kernels_ex
[ 96%] Building CXX object CMakeFiles/using_custom_kernels_ex.dir/using_custom_kernels_ex.cpp.o
[ 97%] Linking CXX executable using_custom_kernels_ex
[ 97%] Built target using_custom_kernels_ex
Scanning dependencies of target video_tracking_ex
[ 97%] Building CXX object CMakeFiles/video_tracking_ex.dir/video_tracking_ex.cpp.o
[ 98%] Linking CXX executable video_tracking_ex
[ 98%] Built target video_tracking_ex
Scanning dependencies of target webcam_face_pose_ex
[ 98%] Building CXX object CMakeFiles/webcam_face_pose_ex.dir/webcam_face_pose_ex.cpp.o
[ 99%] Linking CXX executable webcam_face_pose_ex
/usr/local/lib/libopencv_highgui.so.2.4.11: undefined reference to `TIFFIsTiled@LIBTIFF_4.0'
/usr/local/lib/libopencv_highgui.so.2.4.11: undefined reference to `TIFFOpen@LIBTIFF_4.0'
/usr/local/lib/libopencv_highgui.so.2.4.11: undefined reference to `TIFFReadEncodedStrip@LIBTIFF_4.0'
/usr/local/lib/libopencv_highgui.so.2.4.11: undefined reference to `TIFFSetField@LIBTIFF_4.0'
/usr/local/lib/libopencv_highgui.so.2.4.11: undefined reference to `TIFFWriteScanline@LIBTIFF_4.0'
/usr/local/lib/libopencv_highgui.so.2.4.11: undefined reference to `TIFFGetField@LIBTIFF_4.0'
/usr/local/lib/libopencv_highgui.so.2.4.11: undefined reference to `TIFFScanlineSize@LIBTIFF_4.0'
/usr/local/lib/libopencv_highgui.so.2.4.11: undefined reference to `TIFFSetWarningHandler@LIBTIFF_4.0'
/usr/local/lib/libopencv_highgui.so.2.4.11: undefined reference to `TIFFSetErrorHandler@LIBTIFF_4.0'
/usr/local/lib/libopencv_highgui.so.2.4.11: undefined reference to `TIFFReadEncodedTile@LIBTIFF_4.0'
/usr/local/lib/libopencv_highgui.so.2.4.11: undefined reference to `TIFFReadRGBATile@LIBTIFF_4.0'
/usr/local/lib/libopencv_highgui.so.2.4.11: undefined reference to `TIFFClose@LIBTIFF_4.0'
/usr/local/lib/libopencv_highgui.so.2.4.11: undefined reference to `TIFFRGBAImageOK@LIBTIFF_4.0'
/usr/local/lib/libopencv_highgui.so.2.4.11: undefined reference to `TIFFReadRGBAStrip@LIBTIFF_4.0'
collect2: error: ld returned 1 exit status
make[2]: *** [webcam_face_pose_ex] Error 1
make[1]: *** [CMakeFiles/webcam_face_pose_ex.dir/all] Error 2
make: *** [all] Error 2
いくつかのファイルが欠けているように見えます。どうすれば修正できますか？