| 1 | <?xml version="1.0" encoding="ISO-8859-1"?>
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| 2 | <!DOCTYPE section [
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| 3 | ]>
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| 4 | <section xmlns="http://docbook.org/docbook-ng"
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| 5 | xml:id="ch-system-strippingagain">
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| 6 | <title>Stripping again</title>
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| 7 | <?dbhtml filename="strippingagain.html"?>
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| 8 |
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| 9 | <para>If you are not a programmer and don't plan to do any debugging on your
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| 10 | system software, you can shrink your system by about 200 MB by removing the
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| 11 | debugging symbols from binaries and libraries. This causes no inconvenience
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| 12 | other than not being able to debug the software fully any more.</para>
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| 13 |
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| 14 | <para>Most people who use the command mentioned below don't experience any
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| 15 | problems. But it is easy to make a typo and render your new system unusable, so
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| 16 | before running the strip command it is probably a good idea to make a backup of
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| 17 | the current situation.</para>
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| 18 |
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| 19 | <para>If you are going to perform the stripping, special care is needed to
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| 20 | ensure you're not running any of the binaries that are about to be stripped.
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| 21 | If you're not sure whether you entered chroot with the command given in
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| 22 | <xref linkend="ch-system-chroot"/>, then first exit from chroot:</para>
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| 23 |
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| 24 | <screen><userinput>logout</userinput></screen>
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| 25 |
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| 26 | <para>Then reenter it with:</para>
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| 27 |
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| 28 | <screen><userinput>chroot $LFS /tools/bin/env -i \
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| 29 | HOME=/root TERM=$TERM PS1='\u:\w\$ ' \
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| 30 | PATH=/bin:/usr/bin:/sbin:/usr/sbin \
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| 31 | /tools/bin/bash --login</userinput></screen>
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| 32 |
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| 33 | <para>Now you can safely strip the binaries and libraries:</para>
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| 34 |
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| 35 | <screen><userinput>/tools/bin/find /{,usr/}{bin,lib,sbin} -type f \
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| 36 | -exec /tools/bin/strip --strip-debug '{}' ';'</userinput></screen>
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| 37 |
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| 38 | <para>A large number of files will be reported as having their file format not
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| 39 | recognized. These warnings can be safely ignored, they just mean that those
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| 40 | files are scripts instead of binaries, no harm is done.</para>
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| 41 |
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| 42 | <para>If you are really tight on disk space, you may want to use
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| 43 | <parameter>--strip-all</parameter> on the binaries in
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| 44 | <filename class="directory">/{,usr/}{bin,sbin}</filename> to gain several more megabytes. But do
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| 45 | <emphasis>not</emphasis> use this option on libraries: they would be
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| 46 | destroyed.</para>
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| 47 |
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| 48 | </section>
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| 49 |
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