source: chapter06/zlib.xml@ 456a1d92

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Last change on this file since 456a1d92 was b8a819f, checked in by Manuel Canales Esparcia <manuel@…>, 20 years ago

Changed the id's location in the Short descriptions sections to fix a bug in the PDF generation.

git-svn-id: http://svn.linuxfromscratch.org/LFS/trunk/BOOK@3711 4aa44e1e-78dd-0310-a6d2-fbcd4c07a689

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File size: 3.7 KB
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[673b0d8]1<?xml version="1.0" encoding="ISO-8859-1"?>
2<!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.3//EN" "http://www.oasis-open.org/docbook/xml/4.3/docbookx.dtd" [
3 <!ENTITY % general-entities SYSTEM "../general.ent">
4 %general-entities;
5]>
[a001133]6<sect1 id="ch-system-zlib" xreflabel="Zlib" role="wrap">
[673b0d8]7<title>Zlib-&zlib-version;</title>
8<?dbhtml filename="zlib.html"?>
[24380c7]9
[673b0d8]10<indexterm zone="ch-system-zlib"><primary sortas="a-Zlib">Zlib</primary></indexterm>
11
[a001133]12<sect2 role="package"><title/>
[673b0d8]13<para>The Zlib package contains compression and un-compression routines used by
[5888299]14some programs.</para>
15
[a001133]16<segmentedlist>
17<segtitle>&buildtime;</segtitle>
18<segtitle>&diskspace;</segtitle>
19<seglistitem><seg>0.1 SBU</seg><seg>1.5 MB</seg></seglistitem>
20</segmentedlist>
[673b0d8]21
[a001133]22<segmentedlist>
23<segtitle>Zlib installation depends on</segtitle>
24<seglistitem><seg>Binutils, Coreutils, GCC, Glibc, Make, Sed</seg></seglistitem>
25</segmentedlist>
26</sect2>
[24380c7]27
[a001133]28<sect2 role="installation">
[73aedd1d]29<title>Installation of Zlib</title>
30
[bcd0ce7]31<note><para>Zlib is known to build its shared library incorrectly if CFLAGS is
32specified in the environment. If you are using your own CFLAGS variable, be
[4248b0e]33sure to add the <emphasis>-fPIC</emphasis> directive to your CFLAGS for the
34duration of the below <command>configure</command> command, then remove it
[bcd0ce7]35afterwards.</para></note>
[73aedd1d]36
[4248b0e]37<para>Prepare Zlib for compilation:</para>
38
39<screen><userinput>./configure --prefix=/usr --shared</userinput></screen>
40
[73aedd1d]41<para>Compile the package:</para>
42
43<screen><userinput>make</userinput></screen>
44
[673b0d8]45<para>To test the results, issue:
[8a5f906]46<userinput>make check</userinput>.</para>
[dfddb12]47
48<para>Install the shared library:</para>
[73aedd1d]49
50<screen><userinput>make install</userinput></screen>
51
[dfddb12]52<para>Now also build the non-shared (static) library:</para>
[73aedd1d]53<screen><userinput>make clean
54./configure --prefix=/usr
55make</userinput></screen>
56
[673b0d8]57<para>To again test the results, issue:
[8a5f906]58<userinput>make check</userinput>.</para>
[73aedd1d]59
[84e4cae]60<para>Install the static library:</para>
[73aedd1d]61
62<screen><userinput>make install</userinput></screen>
63
[84e4cae]64<para>And fix the permissions on the static library:</para>
65
66<screen><userinput>chmod 644 /usr/lib/libz.a</userinput></screen>
67
[dfddb12]68<para>It is good policy and common practice to place important libraries into
69the <filename class="directory">/lib</filename> directory. This matters most
70in scenarios where <filename class="directory">/usr</filename> is on a
[db9d773c]71separate partition. Essentially, the run-time components of any libraries that
72are used by programs in <filename class="directory">/bin</filename> or
[dfddb12]73<filename class="directory">/sbin</filename> should reside in
74<filename class="directory">/lib</filename> so that they are on the root
75partition and available in the event of
76<filename class="directory">/usr</filename> being inaccessible.</para>
77
[db9d773c]78<para>For the above reason we move the run-time components of the shared Zlib
79into <filename class="directory">/lib</filename>:</para>
[73aedd1d]80
81<screen><userinput>mv /usr/lib/libz.so.* /lib</userinput></screen>
82
[db9d773c]83<para>Now we need to fix the <filename>/usr/lib/libz.so</filename> symlink
84because we just moved the file it points to:</para>
[73aedd1d]85
86<screen><userinput>ln -sf ../../lib/libz.so.1 /usr/lib/libz.so</userinput></screen>
87
88</sect2>
[24380c7]89
[5888299]90
[c6cb3aa]91<sect2 id="contents-zlib" role="content"><title>Contents of Zlib</title>
[673b0d8]92
[c6cb3aa]93<segmentedlist>
94<segtitle>Installed libraries</segtitle>
95<seglistitem><seg>libz[a,so]</seg></seglistitem>
96</segmentedlist>
[24380c7]97
[c6cb3aa]98<variablelist><title>Short description</title>
[673b0d8]99
[b8a819f]100<varlistentry id="libz">
101<term><command>libz*</command></term>
[c6cb3aa]102<listitem>
[673b0d8]103<indexterm zone="ch-system-zlib libz"><primary sortas="c-libz*">libz*</primary></indexterm>
[c6cb3aa]104<para>contains compression and un-compression
[673b0d8]105functions used by some programs.</para>
[c6cb3aa]106</listitem>
107</varlistentry>
108</variablelist>
[673b0d8]109
110</sect2>
111
112</sect1>
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