1 | <?xml version="1.0" encoding="ISO-8859-1"?>
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2 | <!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.3//EN" "http://www.oasis-open.org/docbook/xml/4.3/docbookx.dtd">
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3 | <sect1 id="ch-system-strippingagain">
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4 | <title>Stripping again</title>
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5 | <?dbhtml filename="strippingagain.html"?>
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6 |
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7 | <para>If the intended user is not a programmer and does not plan to do
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8 | any debugging on the system software, the system size can be decreased
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9 | by about 200 MB by removing the debugging symbols from binaries and
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10 | libraries. This causes no inconvenience other than not being able to
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11 | debug the software fully anymore.</para>
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12 |
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13 | <para>Most people who use the command mentioned below do not
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14 | experience any difficulties. However, it is easy to make a typo and
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15 | render the new system unusable, so before running the strip command,
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16 | it is probably a good idea to make a backup of the current
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17 | situation.</para>
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18 |
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19 | <para>Before perform the stripping, take special care to ensure that
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20 | none of the binaries that are about to be stripped are running. If
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21 | unsure whether the user entered chroot with the command given in
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22 | <xref linkend="ch-system-chroot"/>, first exit from
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23 | chroot:</para>
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24 |
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25 | <screen><userinput>logout</userinput></screen>
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26 |
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27 | <para>Then reenter it with:</para>
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28 |
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29 | <screen><userinput>chroot $LFS /tools/bin/env -i \
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30 | HOME=/root TERM=$TERM PS1='\u:\w\$ ' \
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31 | PATH=/bin:/usr/bin:/sbin:/usr/sbin \
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32 | /tools/bin/bash --login</userinput></screen>
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33 |
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34 | <para>Now the binaries and libraries can be safely stripped:</para>
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35 |
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36 | <screen><userinput>/tools/bin/find /{,usr/}{bin,lib,sbin} -type f \
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37 | -exec /tools/bin/strip --strip-debug '{}' ';'</userinput></screen>
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38 |
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39 | <para>A large number of files will be reported as having their file
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40 | format not recognized. These warnings can be safely ignored. These
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41 | warnings indicate that those files are scripts instead of
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42 | binaries.</para>
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43 |
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44 | <para>If disk space is very tight, the
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45 | <parameter>--strip-all</parameter> options can be used on the binaries
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46 | in <filename class="directory">/{,usr/}{bin,sbin}</filename> to gain
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47 | several more megabytes. Do not use this option on libraries -- they will
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48 | be destroyed.</para>
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49 |
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50 | </sect1>
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51 |
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