source: BOOK/final-system/common/stripping.xml@ c8a83d8

clfs-3.0.0-systemd clfs-3.0.0-sysvinit systemd sysvinit
Last change on this file since c8a83d8 was aa18ac0, checked in by Manuel Canales Esparcia <manuel@…>, 17 years ago

Updated trunk book sources to use DocBook-XML DTD 4.5.

  • Property mode set to 100644
File size: 2.3 KB
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1<?xml version="1.0" encoding="ISO-8859-1"?>
2<!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
3 "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
4 <!ENTITY % general-entities SYSTEM "../../general.ent">
5 %general-entities;
6]>
7
8<sect1 id="ch-system-stripping">
9 <?dbhtml filename="stripping.html"?>
10
11 <title>Stripping</title>
12
13 <para os="a">If the intended user is not a programmer and does not plan to do
14 any debugging on the system software, the system size can be decreased
15 by about 200 MB by removing the debugging symbols from binaries and
16 libraries. This causes no inconvenience other than not being able to
17 debug the software fully anymore.</para>
18
19 <para os="b">Most people who use the command mentioned below do not
20 experience any difficulties. However, it is easy to make a typo and
21 render the new system unusable, so before running the
22 <command>strip</command> command, it is a good idea to make a
23 backup of the current situation.</para>
24
25 <para os="c">Before performing the stripping, take special care to ensure that
26 none of the binaries that are about to be stripped are running. If
27 unsure whether the user entered chroot with the command given in
28 <xref linkend="chapter-chroot" role=","/> first exit from
29 chroot:</para>
30
31<screen os="d" role="nodump"><userinput>logout</userinput></screen>
32
33 <para os="e">Then reenter it with:</para>
34
35<screen os="f" role="nodump"><userinput>chroot ${CLFS} /tools/bin/env -i \
36 HOME=/root TERM=${TERM} PS1='\u:\w\$ ' \
37 PATH=/bin:/usr/bin:/sbin:/usr/sbin \
38 /tools/bin/bash --login</userinput></screen>
39
40 <para os="g">Now the binaries and libraries can be safely stripped:</para>
41
42<screen os="h"><userinput>/tools/bin/find /{,usr/}{bin,lib,sbin} -type f \
43 -exec /tools/bin/strip --strip-debug '{}' ';'</userinput></screen>
44
45 <para os="i">A large number of files will be reported as having their file
46 format not recognized. These warnings can be safely ignored. These
47 warnings indicate that those files are scripts instead of
48 binaries.</para>
49
50 <para os="j">If disk space is very tight, the <option>--strip-all</option>
51 option can be used on the binaries in <filename
52 class="directory">/{,usr/}{bin,sbin}</filename> to gain several more
53 megabytes. Do not use this option on libraries&mdash;they will be
54 destroyed.</para>
55
56</sect1>
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