source: clfs-sysroot/BOOK/cross-tools/arm/variables.xml@ 93a6da3

Last change on this file since 93a6da3 was a074923, checked in by Manuel Canales Esparcia <manuel@…>, 17 years ago

Some fixes for PDF look.

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1<?xml version="1.0" encoding="ISO-8859-1"?>
2<!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
3 "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
4 <!ENTITY % general-entities SYSTEM "../../general.ent">
5 %general-entities;
6]>
7
8<sect1 id="ch-cross-tools-variables">
9 <?dbhtml filename="variables.html"?>
10
11 <title>Build Variables</title>
12
13 <bridgehead renderas="sect4">Setting Host and Target</bridgehead>
14
15 <para os="a">During the building of the cross-compile tools you will need to
16 set a few variables that will be dependent on your particular needs.
17 The first variable will be the triplet of the host machine, which will be
18 put into the <envar>CLFS_HOST</envar> variable. To account for the
19 possibility that the host and target are the same arch, as cross-compiling
20 won't work when host and target are the same, part of the triplet needs to
21 be changed slightly to add "cross". Set <envar>CLFS_HOST</envar> using the
22 following command:</para>
23
24<screen os="b"><userinput>export CLFS_HOST="$(echo $MACHTYPE | \
25 sed "s/$(echo $MACHTYPE | cut -d- -f2)/cross/")"</userinput></screen>
26
27 <para os="c">Now you will need to set the triplet for the target
28 architecture. Set the target variable using the following command:</para>
29
30<screen os="d"><userinput>export CLFS_TARGET="arm-unknown-linux-gnu"</userinput></screen>
31
32 <bridgehead renderas="sect4">Copy settings to Environment</bridgehead>
33
34 <para os="e">Now add these to <filename>~/.bashrc</filename>, just in
35 case you have to exit and restart building later:</para>
36
37<screen os="f"><userinput>echo export CLFS_HOST=\""${CLFS_HOST}\"" &gt;&gt; ~/.bashrc
38echo export CLFS_TARGET=\""${CLFS_TARGET}\"" &gt;&gt; ~/.bashrc</userinput></screen>
39
40</sect1>
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