在安装opencv的过程中，需要安装到
libgtk2.0-dev，安装过程中可能会出现broken packages的问题。
输出信息如下：
# apt-get install libgtk2.0-dev
Reading package lists... Done
Building dependency tree
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:
The following packages have unmet dependencies:
libgtk2.0-dev: Depends: libgtk2.0-0 (= 2.20.0-0ubuntu4) but 2.20.1-0ubuntu2.1 is to be installed
Depends: libglib2.0-dev (>= 2.21.3) but it is not going to be installed
Depends: libpango1.0-dev (>= 1.20) but it is not going to be installed
Depends: libatk1.0-dev (>= 1.13.0) but it is not going to be installed
Depends: libcairo2-dev (>= 1.6.4-6.1) but it is not going to be installed
Depends: libx11-dev (>= 2:1.0.0-6) but it is not going to be installed
Depends: libxext-dev (>= 1:1.0.1-2) but it is not going to be installed
Depends: libxinerama-dev (>= 1:1.0.1-4.1) but it is not going to be installed
Depends: libxi-dev (>= 1:1.0.1-4) but it is not going to be installed
Depends: libxrandr-dev (>= 1:1.2.99) but it is not going to be installed
Depends: libxcursor-dev but it is not going to be installed
Depends: libxfixes-dev (>= 1:3.0.0-3) but it is not going to be installed
Depends: libxcomposite-dev (>= 1:0.2.0-3) but it is not going to be installed
Depends: libxdamage-dev (>= 1:1.0.1-3) but it is not going to be installed
E: Broken packages
解决方法：
1、在Software Sources中修改配置：
勾选Important security updates (lucid-security)和Recommended updates (lucid-updates)选项
如图：
2、执行update操作
apt-get update
3、重新安装：
apt-get install libgtk2.0-dev
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