| 1 | <?xml version="1.0" encoding="ISO-8859-1"?>
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| 2 | <!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.4//EN" "http://www.oasis-open.org/docbook/xml/4.4/docbookx.dtd" [
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| 3 | <!ENTITY % general-entities SYSTEM "../general.ent">
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| 4 | %general-entities;
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| 5 | ]>
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| 6 | <sect1 id="ch-system-strippingagain">
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| 7 | <title>Stripping Again</title>
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| 8 | <?dbhtml filename="strippingagain.html"?>
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| 9 |
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| 10 | <para>If the intended user is not a programmer and does not plan to do
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| 11 | any debugging on the system software, the system size can be decreased
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| 12 | by about 200 MB by removing the debugging symbols from binaries and
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| 13 | libraries. This causes no inconvenience other than not being able to
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| 14 | debug the software fully anymore.</para>
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| 15 |
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| 16 | <para>Most people who use the command mentioned below do not
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| 17 | experience any difficulties. However, it is easy to make a typo and
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| 18 | render the new system unusable, so before running the
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| 19 | <command>strip</command> command, it is a good idea to make a
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| 20 | backup of the LFS system in its current state.</para>
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| 21 |
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| 22 | <para>Before performing the stripping, take special care to ensure that
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| 23 | none of the binaries that are about to be stripped are running. If
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| 24 | unsure whether the user entered chroot with the command given in
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| 25 | <xref linkend="ch-system-chroot" role=","/> first exit from
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| 26 | chroot:</para>
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| 27 |
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| 28 | <screen role="nodump"><userinput>logout</userinput></screen>
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| 29 |
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| 30 | <para>Then reenter it with:</para>
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| 31 |
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| 32 | <screen role="nodump"><userinput>chroot $LFS /tools/bin/env -i \
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| 33 | HOME=/root TERM=$TERM PS1='\u:\w\$ ' \
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| 34 | PATH=/bin:/usr/bin:/sbin:/usr/sbin \
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| 35 | /tools/bin/bash --login</userinput></screen>
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| 36 |
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| 37 | <para>Now the binaries and libraries can be safely stripped:</para>
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| 38 |
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| 39 | <screen><userinput>/tools/bin/find /{,usr/}{bin,lib,sbin} -type f \
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| 40 | -exec /tools/bin/strip --strip-debug '{}' ';'</userinput></screen>
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| 41 |
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| 42 | <para>A large number of files will be reported as having their file
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| 43 | format not recognized. These warnings can be safely ignored. These
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| 44 | warnings indicate that those files are scripts instead of
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| 45 | binaries.</para>
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| 46 |
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| 47 | <para>If disk space is very tight, the
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| 48 | <parameter>--strip-all</parameter> option can be used on the binaries
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| 49 | in <filename class="directory">/{,usr/}{bin,sbin}</filename> to gain
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| 50 | several more megabytes. Do not use this option on libraries—they will
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| 51 | be destroyed.</para>
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| 52 |
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| 53 | </sect1>
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| 54 |
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