我安装了opencv 2.3.1，当我通过在终端上运行命令./delaunay来执行示例时，出现了如下错误：
This program builds the traingulation interactively, you may stop this process by
hitting any key.
OpenCV Error: Unspecified error (The function is not implemented. Rebuild the library with Windows, GTK+ 2.x or Carbon support. If you are on Ubuntu or Debian, install libgtk2.0-dev and pkg-config, then re-run cmake or configure script) in cvNamedWindow, file /home/pi/OpenCV-2.3.1/modules/highgui/src/window.cpp, line 275 terminate called after throwing an instance of 'cv::Exception'
what(): /home/pi/OpenCV-2.3.1/modules/highgui/src/window.cpp:275: error: (-2) The function is not implemented. Rebuild the library with Windows, GTK+ 2.x or Carbon support. If you are on Ubuntu or Debian, install libgtk2.0-dev and pkg-config, then re-run cmake or configure script in function cvNamedWindow
Aborted
解决方案是什么？