debian7更换gcc版本的二种方法分享
<p style='margin: 0px; padding: 5px 0px; outline: none; font-size: 14px; line-height: 30px; font-family: tahoma, arial, "Microsoft YaHei";'>方法一：</p>
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安装gcc4.4和g++4.4<br>
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<span><u>复制代码</u></span>
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代码如下:</p>
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sudo apt-get install gcc-4.4<br>
sudo apt-get isntall g++-4.4</div>
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<br style='font-family: tahoma, arial, "Microsoft YaHei"; font-size: 14px;'><span style='font-family: tahoma, arial, "Microsoft YaHei"; font-size: 14px;'> </span><br style='font-family: tahoma, arial, "Microsoft YaHei"; font-size: 14px;'><span style='font-family: tahoma, arial, "Microsoft YaHei"; font-size: 14px;'>修改默认gcc和g++为4.4的版本</span></p>
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<span><u>复制代码</u></span>
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代码如下:</p>
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sudo update-alternatives --remove-all gcc<br><br>
sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-4.4 40<br>
sudo update-alternatives --install /usr/bin/g++ g++ /usr/bin/g++-4.4 40</div>
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<br style='font-family: tahoma, arial, "Microsoft YaHei"; font-size: 14px;'><span style='font-family: tahoma, arial, "Microsoft YaHei"; font-size: 14px;'> </span><br style='font-family: tahoma, arial, "Microsoft YaHei"; font-size: 14px;'><span style='font-family: tahoma, arial, "Microsoft YaHei"; font-size: 14px;'>配置默认的gcc和g++</span></p>
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<span><u>复制代码</u></span>
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代码如下:</p>
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sudo update-alternatives --config gcc<br>
sudo update-alternatives --config g++</div>
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<br style='font-family: tahoma, arial, "Microsoft YaHei"; font-size: 14px;'><span style='font-family: tahoma, arial, "Microsoft YaHei"; font-size: 14px;'> </span><br style='font-family: tahoma, arial, "Microsoft YaHei"; font-size: 14px;'><span style='font-family: tahoma, arial, "Microsoft YaHei"; font-size: 14px;'>方法二：</span><br style='font-family: tahoma, arial, "Microsoft YaHei"; font-size: 14px;'><span style='font-family: tahoma, arial, "Microsoft YaHei"; font-size: 14px;'> </span><br style='font-family: tahoma, arial, "Microsoft YaHei"; font-size: 14px;'><span style='font-family: tahoma, arial, "Microsoft YaHei"; font-size: 14px;'>首先，看一下你的Debian都装了哪些版本的gcc 用命令：ls /usr/bin/gcc* -l 我的显示是</span></p>
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<span><u>复制代码</u></span>
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代码如下:</p>
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lrwxrwxrwx 1 root root 7 2011-08-14 15:17 /usr/bin/gcc -> gcc-4.7</p> <p>-rwxr-xr-x 1 root root 224544 2011-10-06 05:47 /usr/bin/gcc-4.4</p> <p>-rwxr-xr-x 1 root root 237072 2011-09-17 17:25 /usr/bin/gcc-4.5</p> <p>-rwxr-xr-x 1 root root 302104 2011-09-17 05:43 /usr/bin/gcc-4.6</div>
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由上面显示可以看出默认安装的是gcc-4.7，现在来改成gcc-4.4</p>
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删除gcc－4.7的软连接文件/usr/bin/gcc。（只是删除软连接）</p>
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命令：sudo rm /usr/bin/gcc</p>
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然后建一个软连接，指向gcc-4.4。</p>
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命令：sudo ln -s /usr/bin/gcc-4.4 /usr/bin/gcc</p>
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