Tyler Cipriani https://tylercipriani.com/tags/gnu/ Tyler Cipriani ikiwiki 2017-02-14T15:11:05Z https://tylercipriani.com/blog/2016/05/25/gnu-autotools/ Tyler Cipriani Creative Commons Attribution-ShareAlike License Copyright © 2017 Tyler Cipriani 2017-02-14T15:11:05Z 2016-05-25T14:22:03Z <section id="links" class="level2"> <h2>Links <a href="https://tylercipriani.com/tags/gnu/#links">¶</a></h2> <ul> <li><a href="https://robots.thoughtbot.com/the-magic-behind-configure-make-make-install">https://robots.thoughtbot.com/the-magic-behind-configure-make-make-install</a></li> </ul> </section> <section id="configure.ac" class="level2"> <h2><code>configure.ac</code> <a href="https://tylercipriani.com/tags/gnu/#configure.ac">¶</a></h2> <ul> <li>Written in m4sh (m4 + shell)</li> <li>Program initialization: <code>AC_INIT</code> macro—needs name, version, maintainer</li> <li>Initialize automake: <code>AM_INIT_AUTOMAKE</code></li> <li>Make sure that C-compiler exists: <code>AC_PROG_CC</code></li> <li>Build <code>Makefile</code> from <code>Makefile.in</code>, replaces <code>@PACKAGE_VERSION@</code>-type variables: <code>AC_CONFIG_FILES([Makefile])</code></li> <li>Output the script: <code>AC_OUTPUT</code></li> </ul> <div class="sourceCode" id="cb1"><pre class="sourceCode makefile"><code class="sourceCode makefile"><a class="sourceLine" id="cb1-1" title="1">AC_INIT([hello-world], [0.1], [tyler@tylercipriani.com])</a> <a class="sourceLine" id="cb1-2" title="2"></a> <a class="sourceLine" id="cb1-3" title="3"><span class="co"># Initialize automake</span></a> <a class="sourceLine" id="cb1-4" title="4">AM_INIT_AUTOMAKE</a> <a class="sourceLine" id="cb1-5" title="5"></a> <a class="sourceLine" id="cb1-6" title="6"><span class="co"># Ensure C-compiler exists</span></a> <a class="sourceLine" id="cb1-7" title="7">AC_PROG_CC</a> <a class="sourceLine" id="cb1-8" title="8"></a> <a class="sourceLine" id="cb1-9" title="9"><span class="co"># Specify what files are to be created</span></a> <a class="sourceLine" id="cb1-10" title="10">AC_CONFIG_FILES([Makefile])</a> <a class="sourceLine" id="cb1-11" title="11">AC_OUTPUT</a></code></pre></div> </section> <section id="makefile.am" class="level2"> <h2><code>Makefile.am</code> <a href="https://tylercipriani.com/tags/gnu/#makefile.am">¶</a></h2> <ul> <li>The <code>./configure</code> script (created by <code>configure.ac</code>), expects to find <code>Makefile.in</code></li> <li><code>Makefile.in</code> is long and dumb (just like <code>./configure</code>), so we make a <code>Makefile.am</code></li> <li><code>automake</code> generates <code>Makefile.in</code></li> <li><code>foreign</code> AUTOMAKE_OPTIONS tells that the layout is "non standard"</li> </ul> <div class="sourceCode" id="cb2"><pre class="sourceCode makefile"><code class="sourceCode makefile"><a class="sourceLine" id="cb2-1" title="1"><span class="dt">AUTOMAKE_OPTIONS </span><span class="ch">=</span><span class="st"> foreign</span></a> <a class="sourceLine" id="cb2-2" title="2"><span class="dt">bin_PROGRAMS </span><span class="ch">=</span><span class="st"> hello-world</span></a> <a class="sourceLine" id="cb2-3" title="3"><span class="dt">hello-world_SOURCES </span><span class="ch">=</span><span class="st"> hello-world.c</span></a></code></pre></div> </section> <section id="put-it-all-together" class="level2"> <h2>Put it all together: <a href="https://tylercipriani.com/tags/gnu/#put-it-all-together">¶</a></h2> <ul> <li>create m4 environment: <code>aclocal</code></li> <li><code>autoconf</code> does: <code>configure.ac</code> → <code>configure</code></li> <li><code>automake --add-missing</code> does: <code>Makefile.am</code> → <code>Makefile.in</code></li> <li><code>autoreconf --install</code>: autoreconf runs autoconf, autoheader, aclocal, automake, libtoolize, and autopoint</li> </ul> </section>