apt-get依賴庫版本過高問題的解決（如何處理libqt4-dev在ubuntu的安裝問題）

因爲可能會在項目中應用到Qt的canvas，自然想在自己的VM上先裝上來試試，

Nokia現在的SDK太能用了。

 

我的ubuntu偶而的會升級一下軟件包，結果今天裝libqt4-dev時遇到下面的問題，錯誤提示爲：

 

apt-get install libqt4-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: libqt4-dev: Depends: libpq-dev but it is not going to be installed Depends: libssl-dev but it is not going to be installed E: Broken packages  

 

再往下一查，發現：

 

# apt-get install libpq-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: libpq-dev: Depends: libpq5 (= 8.4.1-1) but 8.4.4-0ubuntu9.10 is to be installed Depends: libssl-dev but it is not going to be installed Depends: libkrb5-dev but it is not going to be installed E: Broken packages  

 

意思就是，雖然我的軟件包更新，但是-dev的包就要求是那個舊一點兒的版本。。

怎麼解決呢？

網上有個相關的帖子：

http://daway320.blog.163.com/blog/static/3878369920107331733393/

 

其中最有用的一句應該是這條命令：

aptitude install libqt4-dbus=4.4.3-1 

這讓我想起來可以用這個方法來給各個軟件包降級。

比如處理libpq的問題：

apt-get install libpq5=8.4.1-1

接下來要手工降級好多庫，如果再有自動化一點兒的方法就好了。 T_T