source: chapter06/strippingagain.xml@ 4d97563

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Last change on this file since 4d97563 was 4d97563, checked in by Bruce Dubbs <bdubbs@…>, 5 years ago

Revert nodump role for stripping

git-svn-id: http://svn.linuxfromscratch.org/LFS/trunk/BOOK@11140 4aa44e1e-78dd-0310-a6d2-fbcd4c07a689

  • Property mode set to 100644
File size: 2.2 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-strippingagain">
9 <?dbhtml filename="strippingagain.html"?>
10
11 <title>Stripping Again</title>
12
13 <para>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 90 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>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 LFS system in its current state.</para>
24
25 <para>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="ch-system-chroot" role=","/> first exit from
29 chroot:</para>
30
31<screen role="nodump"><userinput>logout</userinput></screen>
32
33 <para>Then reenter it with:</para>
34
35<screen role="nodump"><userinput>chroot $LFS /tools/bin/env -i \
36 HOME=/root TERM=$TERM PS1='\u:\w\$ ' \
37 PATH=/bin:/usr/bin:/sbin:/usr/sbin \
38 /tools/bin/bash --login</userinput></screen>
39
40 <para>Now the binaries and libraries can be safely stripped:</para>
41
42<screen><userinput>/tools/bin/find /usr/lib -type f -name \*.a \
43 -exec /tools/bin/strip --strip-debug {} ';'
44
45/tools/bin/find /lib /usr/lib -type f -name \*.so* \
46 -exec /tools/bin/strip --strip-unneeded {} ';'
47
48/tools/bin/find /{bin,sbin} /usr/{bin,sbin,libexec} -type f \
49 -exec /tools/bin/strip --strip-all {} ';'</userinput></screen>
50
51 <para>A large number of files will be reported as having their file
52 format not recognized. These warnings can be safely ignored. These
53 warnings indicate that those files are scripts instead of
54 binaries.</para>
55</sect1>
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