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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13 | <para os="a">If the intended user is not a programmer and does not plan to do |
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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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19 | <para os="b">Most people who use the command mentioned below do not |
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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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25 | <para os="c">Before performing the stripping, take special care to ensure that |
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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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31 | <screen os="d" role="nodump"><userinput>logout</userinput></screen> |
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32 | |
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33 | <para os="e">Then reenter it with:</para> |
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34 | |
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35 | <screen os="f" role="nodump"><userinput>chroot $LFS /tools/bin/env -i \ |
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36 | HOME=/root TERM=$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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40 | <para os="g">Now the binaries and libraries can be safely stripped:</para> |
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41 | |
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42 | <screen os="h"><userinput>/tools/bin/find /{,usr/}{bin,lib,sbin} -type f \ |
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43 | -exec /tools/bin/strip --strip-debug '{}' ';'</userinput></screen> |
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44 | |
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45 | <para os="i">A large number of files will be reported as having their file |
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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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50 | <para os="j">If disk space is very tight, the <option>--strip-all</option> |
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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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