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git-svn-id: http://svn.linuxfromscratch.org/LFS/branches/testing/BOOK@4009 4aa44e1e-78dd-0310-a6d2-fbcd4c07a689
117 lines
3.7 KiB
XML
117 lines
3.7 KiB
XML
<?xml version="1.0" encoding="ISO-8859-1"?>
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<!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.3//EN" "http://www.oasis-open.org/docbook/xml/4.3/docbookx.dtd" [
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<!ENTITY % general-entities SYSTEM "../general.ent">
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%general-entities;
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]>
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<sect1 id="ch-system-zlib" xreflabel="Zlib" role="wrap">
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<title>Zlib-&zlib-version;</title>
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<?dbhtml filename="zlib.html"?>
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<indexterm zone="ch-system-zlib"><primary sortas="a-Zlib">Zlib</primary></indexterm>
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<sect2 role="package"><title/>
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<para>The Zlib package contains compression and un-compression routines used by
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some programs.</para>
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<segmentedlist>
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<segtitle>&buildtime;</segtitle>
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<segtitle>&diskspace;</segtitle>
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<seglistitem><seg>0.1 SBU</seg><seg>1.5 MB</seg></seglistitem>
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</segmentedlist>
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<segmentedlist>
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<segtitle>Zlib installation depends on</segtitle>
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<seglistitem><seg>Binutils, Coreutils, GCC, Glibc, Make, Sed</seg></seglistitem>
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</segmentedlist>
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</sect2>
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<sect2 role="installation">
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<title>Installation of Zlib</title>
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<note><para>Zlib is known to build its shared library incorrectly if
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CFLAGS is specified in the environment. If using a specified CFLAGS
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variable, be sure to add the <parameter>-fPIC</parameter> directive to
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the <emphasis>CFLAGS</emphasis> variable for the duration of the
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configure command below, then remove it afterwards.</para></note>
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<para>Prepare Zlib for compilation:</para>
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<screen><userinput>./configure --prefix=/usr --shared</userinput></screen>
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<para>Compile the package:</para>
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<screen><userinput>make</userinput></screen>
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<para>To test the results, issue:
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<userinput>make check</userinput>.</para>
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<para>Install the shared library:</para>
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<screen><userinput>make install</userinput></screen>
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<para>Build the static library:</para>
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<screen><userinput>make clean
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./configure --prefix=/usr
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make</userinput></screen>
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<para>To test the results again, issue:
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<userinput>make check</userinput>.</para>
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<para>Install the static library:</para>
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<screen><userinput>make install</userinput></screen>
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<para>Fix the permissions on the static library:</para>
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<screen><userinput>chmod 644 /usr/lib/libz.a</userinput></screen>
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<para>It is good policy and common practice to place important
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libraries into the <filename class="directory">/lib</filename>
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directory. This is most important in scenarios where <filename
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class="directory">/usr</filename> is on a separate partition.
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Essentially, the run-time components of any libraries that are used by
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programs in <filename class="directory">/bin</filename> or <filename
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class="directory">/sbin</filename> should reside in <filename
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class="directory">/lib</filename> so that they are on the root
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partition and available in the event of <filename
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class="directory">/usr</filename> being inaccessible.</para>
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<para>For the above reason, move the run-time components of the shared Zlib
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into <filename class="directory">/lib</filename>:</para>
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<screen><userinput>mv /usr/lib/libz.so.* /lib</userinput></screen>
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<para>Fix the <filename class="symlink">/usr/lib/libz.so</filename> symlink
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after the above move:</para>
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<screen><userinput>ln -sf ../../lib/libz.so.1 /usr/lib/libz.so</userinput></screen>
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</sect2>
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<sect2 id="contents-zlib" role="content"><title>Contents of Zlib</title>
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<segmentedlist>
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<segtitle>Installed libraries</segtitle>
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<seglistitem><seg>libz[a,so]</seg></seglistitem>
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</segmentedlist>
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<variablelist><bridgehead renderas="sect3">Short descriptions</bridgehead>
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<?dbfo list-presentation="list"?>
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<varlistentry id="libz">
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<term><filename class="libraryfile">libz*</filename></term>
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<listitem>
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<para>contains compression and un-compression
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functions used by some programs.</para>
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<indexterm zone="ch-system-zlib libz"><primary sortas="c-libz*">libz*</primary></indexterm>
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</listitem>
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</varlistentry>
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</variablelist>
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</sect2>
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</sect1>
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