newxml/chapter06/chapter06.xml

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   2 <!DOCTYPE chapter 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 ]>
   6 <chapter id="chapter-building-system" xreflabel="Chapter 6">
   7 <?dbhtml dir="chapter06"?>
   8 <title>Installing basic system software</title>
   9 <?dbhtml filename="chapter06.html"?>
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  21 <xi:include xmlns:xi="http://www.w3.org/2003/XInclude" href="changingowner.xml"/>
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  36 <xi:include xmlns:xi="http://www.w3.org/2003/XInclude" href="kernel-headers.xml"/>
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  39 <xi:include xmlns:xi="http://www.w3.org/2003/XInclude" href="man-pages.xml"/>
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  42 <xi:include xmlns:xi="http://www.w3.org/2003/XInclude" href="glibc.xml"/>
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  47 <xi:include xmlns:xi="http://www.w3.org/2003/XInclude" href="readjusting.xml"/>
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  50 <xi:include xmlns:xi="http://www.w3.org/2003/XInclude" href="binutils.xml"/>
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  53 <xi:include xmlns:xi="http://www.w3.org/2003/XInclude" href="gcc.xml"/>
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  57 <xi:include xmlns:xi="http://www.w3.org/2003/XInclude" href="coreutils.xml"/>
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  69 <xi:include xmlns:xi="http://www.w3.org/2003/XInclude" href="findutils.xml"/>
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  75 <xi:include xmlns:xi="http://www.w3.org/2003/XInclude" href="ncurses.xml"/>
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  78 <xi:include xmlns:xi="http://www.w3.org/2003/XInclude" href="vim.xml"/>
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  81 <xi:include xmlns:xi="http://www.w3.org/2003/XInclude" href="m4.xml"/>
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  84 <xi:include xmlns:xi="http://www.w3.org/2003/XInclude" href="bison.xml"/>
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  87 <xi:include xmlns:xi="http://www.w3.org/2003/XInclude" href="less.xml"/>
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  90 <xi:include xmlns:xi="http://www.w3.org/2003/XInclude" href="groff.xml"/>
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  93 <xi:include xmlns:xi="http://www.w3.org/2003/XInclude" href="sed.xml"/>
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  96 <xi:include xmlns:xi="http://www.w3.org/2003/XInclude" href="flex.xml"/>
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  99 <xi:include xmlns:xi="http://www.w3.org/2003/XInclude" href="gettext.xml"/>
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 120 <xi:include xmlns:xi="http://www.w3.org/2003/XInclude" href="bash.xml"/>
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 189 <xi:include xmlns:xi="http://www.w3.org/2003/XInclude" href="gcc-2953.xml"/>
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 194 <xi:include xmlns:xi="http://www.w3.org/2003/XInclude" href="aboutdebug.xml"/>
 195
 196
 197 <sect1 id="ch-system-strippingagain">
 198 <title>Stripping again</title>
 199 <?dbhtml filename="strippingagain.html"?>
 200
 201 <para>If you are not a programmer and don't plan to do any debugging on your
 202 system software, you can shrink your system by about 200 MB by removing the
 203 debugging symbols from binaries and libraries. This causes no inconvenience
 204 other than not being able to debug the software fully any more.</para>
 205
 206 <para>Most people who use the command mentioned below don't experience any
 207 problems. But it is easy to make a typo and render your new system unusable, so
 208 before running the strip command it is probably a good idea to make a backup of
 209 the current situation.</para>
 210
 211 <para>If you are going to perform the stripping, special care is needed to
 212 ensure you're not running any of the binaries that are about to be stripped.
 213 If you're not sure whether you entered chroot with the command given in
 214 <xref linkend="ch-system-chroot"/>, then first exit from chroot:</para>
 215
 216 <screen><userinput>logout</userinput></screen>
 217
 218 <para>Then reenter it with:</para>
 219
 220 <screen><userinput>chroot $LFS /tools/bin/env -i \
 221     HOME=/root TERM=$TERM PS1='\u:\w\$ ' \
 222     PATH=/bin:/usr/bin:/sbin:/usr/sbin \
 223     /tools/bin/bash --login</userinput></screen>
 224
 225 <para>Now you can safely strip the binaries and libraries:</para>
 226
 227 <screen><userinput>/tools/bin/find /{,usr/}{bin,lib,sbin} -type f \
 228    -exec /tools/bin/strip --strip-debug '{}' ';'</userinput></screen>
 229
 230 <para>A large number of files will be reported as having their file format not
 231 recognized. These warnings can be safely ignored, they just mean that those
 232 files are scripts instead of binaries, no harm is done.</para>
 233
 234 <para>If you are really tight on disk space, you may want to use
 235 <emphasis>--strip-all</emphasis> on the binaries in
 236 <filename>/{,usr/}{bin,sbin}</filename> to gain several more megabytes. But do
 237 <emphasis>not</emphasis> use this option on libraries: they would be
 238 destroyed.</para>
 239
 240 </sect1>
 241
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 243 <xi:include xmlns:xi="http://www.w3.org/2003/XInclude" href="revisedchroot.xml"/>
 244
 245 </chapter>