[3f8be484] | 1 | <?xml version="1.0" encoding="ISO-8859-1"?> |
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| 2 | <!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.4//EN" |
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| 3 | "http://www.oasis-open.org/docbook/xml/4.4/docbookx.dtd" [ |
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| 4 | <!ENTITY % general-entities SYSTEM "../../general.ent"> |
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| 5 | %general-entities; |
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| 6 | ]> |
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| 7 | |
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| 8 | <sect1 id="ch-system-stripping"> |
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| 9 | <?dbhtml filename="stripping.html"?> |
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| 10 | |
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| 11 | <title>Stripping</title> |
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| 12 | |
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[b4f5af8] | 13 | <para os="a">If the intended user is not a programmer and does not plan to do |
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[3f8be484] | 14 | any debugging on the system software, the system size can be decreased |
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| 15 | by about 200 MB by removing the debugging symbols from binaries and |
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| 16 | libraries. This causes no inconvenience other than not being able to |
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| 17 | debug the software fully anymore.</para> |
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| 18 | |
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[b4f5af8] | 19 | <para os="b">Most people who use the command mentioned below do not |
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[3f8be484] | 20 | experience any difficulties. However, it is easy to make a typo and |
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| 21 | render the new system unusable, so before running the |
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| 22 | <command>strip</command> command, it is a good idea to make a |
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| 23 | backup of the current situation.</para> |
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| 24 | |
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[b4f5af8] | 25 | <para os="c">Before performing the stripping, take special care to ensure that |
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[3f8be484] | 26 | none of the binaries that are about to be stripped are running. If |
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| 27 | unsure whether the user entered chroot with the command given in |
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| 28 | <xref linkend="chapter-chroot" role=","/> first exit from |
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| 29 | chroot:</para> |
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| 30 | |
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[3a3e135] | 31 | <screen os="d" role="nodump"><userinput>logout</userinput></screen> |
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[3f8be484] | 32 | |
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[b4f5af8] | 33 | <para os="e">Then reenter it with:</para> |
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[3f8be484] | 34 | |
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[3a3e135] | 35 | <screen os="f" role="nodump"><userinput>chroot $LFS /tools/bin/env -i \ |
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[3f8be484] | 36 | HOME=/root TERM=$TERM PS1='\u:\w\$ ' \ |
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| 37 | PATH=/bin:/usr/bin:/sbin:/usr/sbin \ |
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| 38 | /tools/bin/bash --login</userinput></screen> |
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| 39 | |
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[b4f5af8] | 40 | <para os="g">Now the binaries and libraries can be safely stripped:</para> |
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[3f8be484] | 41 | |
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[b4f5af8] | 42 | <screen os="h"><userinput>/tools/bin/find /{,usr/}{bin,lib,sbin} -type f \ |
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[3f8be484] | 43 | -exec /tools/bin/strip --strip-debug '{}' ';'</userinput></screen> |
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| 44 | |
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[b4f5af8] | 45 | <para os="i">A large number of files will be reported as having their file |
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[3f8be484] | 46 | format not recognized. These warnings can be safely ignored. These |
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| 47 | warnings indicate that those files are scripts instead of |
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| 48 | binaries.</para> |
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| 49 | |
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[b4f5af8] | 50 | <para os="j">If disk space is very tight, the <option>--strip-all</option> |
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[3f8be484] | 51 | option can be used on the binaries in <filename |
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| 52 | class="directory">/{,usr/}{bin,sbin}</filename> to gain several more |
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| 53 | megabytes. Do not use this option on libraries—they will be |
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| 54 | destroyed.</para> |
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| 55 | |
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| 56 | </sect1> |
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