| 1 | <?xml version="1.0" encoding="ISO-8859-1"?>
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| 2 | <!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
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| 3 | "http://www.oasis-open.org/docbook/xml/4.5/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-tools-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>The steps in this section are optional, but if the LFS partition is
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| 14 | rather small, it is beneficial to learn that unnecessary items can be removed.
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| 15 | The executables and libraries built so far contain about 70 MB of unneeded
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| 16 | debugging symbols. Remove those symbols with:</para>
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| 17 |
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| 18 | <screen><userinput>$LFS_TGT-strip --strip-debug $LFS/usr/lib/*
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| 19 | $LFS_TGT-strip --strip-unneeded $LFS/usr/{,s}bin/*</userinput></screen>
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| 20 |
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| 21 | <para>These commands will skip a number of files, reporting that it does not
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| 22 | recognize their file format. Most of these are scripts instead of binaries.
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| 23 | Note that we use the <command>strip</command> program built in
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| 24 | <quote>Binutils pass 1</quote>, since it is the one that knows how to strip
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| 25 | our cross-compiled programs.</para>
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| 26 | <!-- Normally, the host "strip" could be used too, since it is actually the
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| 27 | same computer. But Some old versions of binutils may generate buggy crt1.o
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| 28 | and the like, because they do not know about recently introduced symbol
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| 29 | types. For more details,
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| 30 | see https://sourceware.org/bugzilla/show_bug.cgi?id=22875-->
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| 31 |
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| 32 | <para>Take care <emphasis>not</emphasis> to use
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| 33 | <parameter>--strip-unneeded</parameter> on the libraries. The static
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| 34 | ones would be destroyed and the toolchain packages would need to be
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| 35 | built all over again.</para>
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| 36 |
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| 37 | <para>To save more, remove the documentation:</para>
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| 38 |
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| 39 | <screen><userinput>rm -rf $LFS/usr/{,share}/{info,man,doc}</userinput></screen>
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| 40 |
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| 41 | <para>The libtool .la files are only useful when linking with static
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| 42 | libraries. They are unneeded, and potentially harmful, when using dynamic
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| 43 | shared libraries, specially when using also non-autotools build systems.
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| 44 | Remove those files now:</para>
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| 45 |
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| 46 | <screen><userinput>find $LFS/usr/{lib,libexec} -name \*.la -delete</userinput></screen>
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| 47 |
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| 48 | <para>At this point, you should have at least 3 GB of free space in
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| 49 | <envar>$LFS</envar> that can be used to build and install Glibc and Gcc in
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| 50 | the next phase. If you can build and install Glibc, you can build and install
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| 51 | the rest too.</para>
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| 52 |
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| 53 | </sect1>
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