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6.24. M4-1.4.3
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Linux From Scratch - Version 6.1
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Chapter 6. 安装系统基础软件
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6.24. M4-1.4.3
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<p>M4 软件包包含一个宏处理器。</p>
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<strong><span class="segtitle">预计编译时间：</span></strong> <span class="seg">0.1 SBU</span>
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<strong><span class="segtitle">所需磁盘空间：</span></strong> <span class="seg">2.8 MB</span>
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<strong><span class="segtitle">安装依赖于：</span></strong> <span class="seg">Bash, Binutils, Coreutils, Diffutils, GCC, Gettext, Glibc, Grep, Make, Perl, Sed</span>
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6.24.1. 安装 M4
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准备编译 M4 ： </p>
<pre class="userinput"><kbd class="command">./configure --prefix=/usr</kbd></pre>
<p>编译软件包：</p>
<pre class="userinput"><kbd class="command">make</kbd></pre>
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要测试结果，请运行： <strong class="userinput"><tt>make check</tt></strong>
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安装软件包：
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<pre class="userinput"><kbd class="command">make install</kbd></pre>
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6.24.2. M4 的内容 </h2>
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<strong><span class="segtitle">安装的程序：</span></strong> <span class="seg">m4</span>
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<a id="id3323115" name="id3323115"></a>简要描述</h3>
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<a id="m4" name="m4"></a><span class="term"><span><strong class="command">m4</strong></span></span>
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<p>
M4 能够将宏展开并将输入拷贝到输出。宏可以是内嵌的也可以是用户定义的，并且可以接受很多参数。除了展开宏，<span><strong class="command">m4</strong></span> 还有其它内置的功能，比如包含引用文件、运行 Unix 命令、进行整数运算、文本操作、循环等等。<span><strong class="command">m4</strong></span>
可以被用作一个编译器的前端或作为自身的一个宏处理程序。</p>
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