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iPad2可不仅仅是一个电子书，也不仅仅是用来看电影大号MP4。<img class="wlEmoticon wlEmoticon-smile" style="border-style: none;" src= "data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" data-lazy-src="uploads/2012/01/wlEmoticon-smile1.png" alt="微笑" /> 废话就不多说了，下面介绍的是我给iPad2配置gcc编译环境的过程。
<p>1、首先你必须越狱，网上教程也很多，这里就不多讲了。</p>
<p><em><strong>声明：越狱可以让你的ipad运行无签名的可执行文件，但可能损害你的设备，对于你设备可能出现的问题，本文不负任何责任！</strong></em></p>
<p>好了，现在我假设你的设备已经越狱成功。很棒，下面请让你的ipad接入一个无线网络，后续的步骤也可能需要网络 ：）</p>
<p>如果你想使用电脑来SSH 到iPad2 你可能需要使用Cydia来安装openssh。</p>
<p>记得安装完Openssh要修改root和mobile用户的密码哦！（默认是<span style="background-color: #ffff00;">alpine</span>）</p>
<p>PC端可以可以使用putty 和winscp配合来访问iPad2，MAC系统或者Linux可以使用系统自带的终端 ssh <a href="mailto:root@192.168.1.6">root@192.168.1.6</a> 。我这里使用的是Tunnelier，它集成了putty 和winscp两款工具的功能，个人感觉很好用！</p>
<p><strong>可能用的的工具：</strong></p>
<p>Tunnelier （地址：<a target="_blank" rel="noopener" href="http://www.bitvise.com/tunnelier">www.bitvise.com/<strong>tunnelier</strong></a>）<em><span style="color: #a5a5a5;">推荐</span></em></p>
<p>putty （地址：<a target="_blank" rel="noopener" href="http://www.putty.org/">www.<strong>putty</strong>.org/</a>）</p>
<p>winscp（地址：<a title="http://winscp.net/" target="_blank" rel="noopener" href="http://winscp.net/">http://winscp.net/</a>）</p>
<p><strong>需要在cydia安装一些必要的工具：</strong></p>
<p>Openssh（提供SSH 服务）</p>
<p>wget (下载工具）</p>
<p>unzip 及 zip (解压缩及压缩打包工具）</p>
<p>sudo（允许普通用户执行root命令的工具）</p>
<p>make（很强大的工具）</p>
<p>Aptitude 及 APT 0.6 Transitional (deb 包工具，允许执行apt-get等命令)</p>
<p><em>是不是觉得iPad2越来越像台电脑了呢？</em> ：)</p>
<span id="more"></span>
<p><strong>2、使用Tunnelier SSH到你的iPad</strong></p>
<p><a href="uploads/2012/01/image1.png"><img style="background-image: none; padding-left: 0px; padding-right: 0px; display: inline; padding-top: 0px; border-width: 0px;" title="image" src= "data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" data-lazy-src="uploads/2012/01/image_thumb1.png" alt="image" width="508" height="359" border="0" /></a></p>
<p>Host：添入你的iPad的IP地址</p>
<p>Prot：默认是22</p>
<p>Username：root（用root或者mobile用户登录，这里是root）</p>
<p>Password：默认是<span style="background-color: #ffff00;">alpine</span>，如果修改过请填入修改后的密码（再次提醒一定要修改root密码！）</p>
<p>SPN：不填</p>
<p><em>为了系统的安全性，建议平时使用普通用户登录。</em></p>
<p><strong>将mobile用户加到sudo组，在命令行输入：</strong><pre lang="bash">$ visudo</pre><br>这个和vi的用法一样，移动光标到最后一行，按A在最后添加</p>
<p>mobile ALL=(ALL) ALL</p>
<p>如图：</p>
<p><a href="uploads/2012/01/image2.png"><img style="background-image: none; padding-left: 0px; padding-right: 0px; display: inline; padding-top: 0px; border-width: 0px;" title="image" src= "data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" data-lazy-src="uploads/2012/01/image_thumb2.png" alt="image" width="417" height="282" border="0" /></a></p>
<p>使用:wq或者ZZ保存并退出vi。</p>
<p>以后就可以用 mobile用户登录并使用sudo命令来执行一些危险的操作了！</p>
<p><strong>3、开始安装</strong></p>
<p>再次使用mobile用户重新SSH到iPad后，在终端输入以下命令：</p>
<pre lang="bash" line="1">wget http://apt.saurik.com/debs/libgcc_4.2-20080410-1-6_iphoneos-arm.deb
sudo dpkg -i libgcc_4.2-20080410-1-6_iphoneos-arm.deb
sudo apt-get install iphone-gcc ldid
#注：安装ldid为应用程序签名(防止在应用启动时被iOS杀掉)</pre><a href="uploads/2012/01/image3.png"><img style="background-image: none; padding-left: 0px; padding-right: 0px; display: inline; padding-top: 0px; border-width: 0px;" title="image" src= "data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" data-lazy-src="uploads/2012/01/image_thumb3.png" alt="image" width="424" height="279" border="0" /></a>
<p><strong>安装 libSystem：</strong><pre lang="bash" line="1">cd /usr/lib/<br>sudo ln -s libSystem.B.dylib libSystem.dylib</pre><strong>下载并安装SDK(IPAD)头文件:</strong></p>
<p>下载sys32Libheader.tgz 文件到 iPad 路径 /var</p>
<p><a href="http://115.com/file/bhy27ghj" target="_blank">点击下载</a></p>
<p>也可以将下载下来的tgz包通过sftp传到/var 目录，终端中输入代码：</p>
<pre lang="bash" line="1">cd /var
tar xzvf sys32Libheader.tgz</pre>
<p>此时gcc的默认include和lib目录里还没有那些sys32的内容。继续如下步骤：</p>
<p>使用电脑ssh入ipad，或者在ipad里面使用终端，在mobile目录下生成 .bash_profile文件：</p>
<pre lang="bash" line="1">cd /private/var/mobile
vim .bash_profile</pre>
<p>填入如下内容</p>
<pre lang="bash" line="1">C_INCLUDE_PATH=/var/sys32/usr/include
export C_INCLUDE_PATH
CPLUS_INCLUDE_PATH=/var/sys32/usr/include
export CPLUS_INCLUDE_PATH
LIBRARY_PATH=/var/sys32/usr/lib
export LIBRARY_PATH</pre>
<p>使用:wq或者ZZ保存并退出vim。</p>
<p>切换成root用户：</p>
<pre lang="bash" line="1">su – root</pre>
<p>修改/etc/profile文件，在里面加入一行<br>source /var/mobile/.bash_profile</p>
<p>切换回mobile用户：</p>
<pre lang="bash" line="1">su – mobile</pre>
<p>此时gcc环境已经配置好了！</p>
<p><strong>使用gcc 测试 hello.c</strong><pre lang="bash" line="1">cd /private/var/mobile<br>vim hello.c</pre><strong>输入下面的内容：</strong><pre lang="c" line="1"><br>#include <stdio.h><br>main()<br>{<br>printf("Hello iPad2!\n");<br>}</pre><br>使用:wq或者ZZ保存并退出。</p>
<p>编译并执行：</p>
<pre lang="bash" line="1">
gcc hello.c -o hello
ldid -S hello
./hello
#为编译后的应用程序签名的方式是，运行:ldid –S [Aplication];</pre>
<p>哈哈，看到iPad2上成功的第一次执行了自己写的代码！</p>
<p>附图：</p>
<p><a href="uploads/2012/01/image4.png"><img style="background-image: none; padding-left: 0px; padding-right: 0px; display: inline; padding-top: 0px; border: 0px;" title="image" src= "data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" data-lazy-src="uploads/2012/01/image_thumb4.png" alt="image" width="500" height="250" border="0" /></a></p>
<p><em><span style="font-size: x-small;">注：部分内容参考</span></em><a title="http://antirez.com/page/iphone-gcc-guide.html" target="_blank" rel="noopener" href="http://antirez.com/page/iphone-gcc-guide.html"><em><span style="font-size: x-small;">http://antirez.com/page/iphone-gcc-guide.html</span></em></a><br></content></p>
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