Initial commit of alternative cross LFS

git-svn-id: http://svn.linuxfromscratch.org/LFS/branches/cross2@11897 4aa44e1e-78dd-0310-a6d2-fbcd4c07a689

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+<?xml version="1.0" encoding="ISO-8859-1"?>
+<!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
+  "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
+  <!ENTITY % general-entities SYSTEM "../general.ent">
+  %general-entities;
+]>
+
+<sect1 id="ch-tools-stripping">
+  <?dbhtml filename="stripping.html"?>
+
+  <title>Stripping</title>
+
+  <para>The steps in this section are optional, but if the LFS partition is
+  rather small, it is beneficial to learn that unnecessary items can be removed.
+  The executables and libraries built so far contain about 70 MB of unneeded
+  debugging symbols. Remove those symbols with:</para>
+
+<screen><userinput>$LFS_TGT-strip --strip-debug $LFS/usr/lib/*
+$LFS_TGT-strip --strip-unneeded $LFS/usr/{,s}bin/*</userinput></screen>
+
+  <para>These commands will skip a number of files, reporting that it does not
+  recognize their file format. Most of these are scripts instead of binaries.
+  Note that we use the <command>strip</command> program built in
+  <quote>Binutils pass 1</quote>, since it is the one that knows how to strip
+  our cross-compiled programs.</para>
+<!-- Normally, the host "strip" could be used too, since it is actually the
+same computer. But Some old versions of binutils may generate buggy crt1.o
+and the like, because they do not know about recently introduced symbol
+types. For more details,
+see https://sourceware.org/bugzilla/show_bug.cgi?id=22875-->
+
+  <para>Take care <emphasis>not</emphasis> to use
+  <parameter>--strip-unneeded</parameter> on the libraries. The static
+  ones would be destroyed and the toolchain packages would need to be
+  built all over again.</para>
+
+  <para>To save more, remove the documentation:</para>
+
+<screen><userinput>rm -rf $LFS/usr/{,share}/{info,man,doc}</userinput></screen>
+
+  <para>The libtool .la files are only useful when linking with static
+  libraries. They are unneeded, and potentially harmful, when using dynamic
+  shared libraries, specially when using also non-autotools build systems.
+  Remove those files now:</para>
+
+<screen><userinput>find $LFS/usr/{lib,libexec} -name \*.la -delete</userinput></screen>
+
+  <para>At this point, you should have at least 3 GB of free space in
+  <envar>$LFS</envar> that can be used to build and install Glibc and Gcc in
+  the next phase. If you can build and install Glibc, you can build and install
+  the rest too.</para>
+
+</sect1>