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210 lines
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210 lines
6.6 KiB
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
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<head>
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<meta http-equiv="Content-Type" content=
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"application/xhtml+xml; charset=utf-8" />
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<title>
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6.37. Bc-1.06.95
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</title>
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<link rel="stylesheet" type="text/css" href="../stylesheets/lfs.css" />
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<meta name="generator" content="DocBook XSL Stylesheets V1.78.1" />
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</head>
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<body class="lfs" id="lfs-7.7-systemd">
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<div class="navheader">
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<h4>
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Linux From Scratch - Version 7.7-systemd
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</h4>
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<h3>
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第六章 安装基本的系统软件
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</h3>
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<ul>
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<li class="prev">
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<a accesskey="p" href="bash.html" title="Bash-4.3.30">上一页</a>
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Bash-4.3.30
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<a accesskey="n" href="libtool.html" title="Libtool-2.4.6">下一页</a>
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Libtool-2.4.6
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<a accesskey="u" href="chapter06.html" title=
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"第六章 安装基本的系统软件">返回</a>
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<a accesskey="h" href="../index.html" title=
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"Linux From Scratch - Version 7.7-systemd">主页</a>
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</li>
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</ul>
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</div>
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<div class="wrap" lang="en" xml:lang="en">
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<h1 class="sect1">
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<a id="ch-system-bc" name="ch-system-bc"></a>6.37. Bc-1.06.95
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</h1>
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<div class="package" lang="en" xml:lang="en">
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<p>
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Bc 软件包包括一个任意精度数值处理的语言。
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</p>
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<div class="segmentedlist">
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<div class="seglistitem">
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<div class="seg">
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<strong class="segtitle">大概编译时间：</strong>
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<span class="segbody">0.1 SBU</span>
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</div>
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<div class="seg">
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<strong class="segtitle">需要磁盘空间：</strong>
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<span class="segbody">4.0 MB</span>
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</div>
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</div>
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</div>
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</div>
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<div class="installation" lang="en" xml:lang="en">
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<h2 class="sect2">
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6.37.1. 安装 Bc
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</h2>
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<p>
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首先，修复代码中一些小的内存泄露：
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</p>
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<pre class="userinput">
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<kbd class="command">patch -Np1 -i ../bc-1.06.95-memory_leak-1.patch</kbd>
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</pre>
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<p>
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准备编译 Bc：
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</p>
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<pre class="userinput">
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<kbd class="command">./configure --prefix=/usr \
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--with-readline \
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--mandir=/usr/share/man \
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--infodir=/usr/share/info</kbd>
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</pre>
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<div class="variablelist">
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<p class="title">
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<strong>配置选项的含义：</strong>
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</p>
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<dl class="variablelist">
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<dt>
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<span class="term"><em class=
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"parameter"><code>--with-readline</code></em></span>
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</dt>
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<dd>
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<p>
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该选项告诉 Bc 使用系统中已经安装的 <code class=
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"filename">readline</code> 库而不是使用自带的 readline 版本。
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</p>
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</dd>
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</dl>
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</div>
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<p>
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编译软件包：
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</p>
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<pre class="userinput">
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<kbd class="command">make</kbd>
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</pre>
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<p>
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运行下面的命令来测试 bc。这会输出好多内容，因此你可能希望重定向到一个文件。
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测试用会有很小的比例(10 of 12,144)说最后一位数字有舍入误差。
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</p>
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<pre class="userinput">
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<kbd class="command">echo "quit" | ./bc/bc -l Test/checklib.b</kbd>
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</pre>
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<p>
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安装软件包：
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</p>
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<pre class="userinput">
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<kbd class="command">make install</kbd>
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</pre>
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</div>
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<div class="content" lang="en" xml:lang="en">
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<h2 class="sect2">
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<a id="contents-bc" name="contents-bc"></a>6.37.2. Bc 的内容
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</h2>
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<div class="segmentedlist">
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<div class="seglistitem">
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<div class="seg">
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<strong class="segtitle">安装的程序</strong>
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<span class="segbody">bc 和 dc</span>
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</div>
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</div>
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</div>
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<div class="variablelist">
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<h3>
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简要介绍
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</h3>
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<table border="0" class="variablelist">
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<colgroup>
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<col align="left" valign="top" />
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<col />
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</colgroup>
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<tbody>
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<tr>
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<td>
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<p>
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<a id="bc" name="bc"></a><span class="term"><span class=
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"command"><strong>bc</strong></span></span>
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</p>
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</td>
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<td>
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<p>
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一个命令行计算器
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</p>
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</td>
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</tr>
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<tr>
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<td>
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<p>
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<a id="dc" name="dc"></a><span class="term"><span class=
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"command"><strong>dc</strong></span></span>
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</p>
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</td>
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<td>
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<p>
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逆波兰命令行计算器
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</p>
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</td>
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</tr>
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</tbody>
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</table>
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</div>
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</div>
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</div>
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<div class="navfooter">
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<div class="book">
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<div class="titlepage">
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<div class="author">
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<span class="firstname">翻译团队：<a href="http://lctt.github.io/" target="_blank">LCTT</a></span>
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<span class="surname">译者/校对：<a href="http://github.com/ictlyh" target="_blank">ictlyh</a>,</span>
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</div>
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</div>
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</div>
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<ul>
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<li class="prev">
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<a accesskey="p" href="bash.html" title="Bash-4.3.30">上一页</a>
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<p>
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Bash-4.3.30
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</li>
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<li class="next">
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<a accesskey="n" href="libtool.html" title="Libtool-2.4.6">下一页</a>
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<p>
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Libtool-2.4.6
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</p>
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</li>
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<li class="up">
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<a accesskey="u" href="chapter06.html" title=
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"第六章 安装基本的系统软件">返回</a>
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</li>
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<li class="home">
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<a accesskey="h" href="../index.html" title=
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"Linux From Scratch - Version 7.7-systemd">主页</a>
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</li>
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</ul>
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</div>
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</body>
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</html>
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