source: BOOK/final-preps/x86/variables.xml @ 5585711

clfs-3.0.0-systemdsystemd
Last change on this file since 5585711 was 5585711, checked in by Chris Staub <chris@…>, 10 years ago

Merged Build Flags pages with Build Variables, and moved those to final-preps

  • Property mode set to 100644
File size: 2.8 KB
Line 
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 ${MACHTYPE} | sed -e 's/-[^-]*/-cross/')</userinput></screen>
25
26  <para os="c">Now you will need to set the triplet for the target
27  architecture. Set the target variable using the following command:</para>
28
29<screen os="d"><userinput>export CLFS_TARGET="[target triplet]"</userinput></screen>
30
31  <para os="t1">Replace [target triplet] with the appropriate machine triplet
32  using the table at the bottom of the page.</para>
33
34  <bridgehead renderas="sect4">Copy settings to the Environment</bridgehead>
35
36  <para os="e">Now add these to <filename>~/.bashrc</filename>, just in
37  case you have to exit and restart building later:</para>
38
39<screen os="f"><userinput>cat &gt;&gt; ~/.bashrc &lt;&lt; EOF
40export CLFS_HOST="${CLFS_HOST}"
41export CLFS_TARGET="${CLFS_TARGET}"
42EOF</userinput></screen>
43
44  <table os="g">
45    <title>Processor Type and  Target Triplets</title>
46    <?dbfo table-width="5in" ?>
47
48    <tgroup cols="2">
49
50      <colspec colnum="1" colwidth="2.5in" colname="Processor"/>
51      <colspec colnum="2" colwidth="2.5in" colname="Triplet"/>
52
53      <thead>
54        <row>
55          <entry>Processor</entry>
56          <entry>Target Triplet</entry>
57        </row>
58      </thead>
59
60      <tbody>
61        <row>
62          <entry>386 Compatibles</entry>
63          <entry>Not Supported By Glibc</entry>
64        </row>
65        <row>
66          <entry>486 Compatibles</entry>
67          <entry>i486-pc-linux-gnu</entry>
68        </row>
69        <row>
70          <entry>Pentium, K6, 586 Compatibles</entry>
71          <entry>i586-pc-linux-gnu</entry>
72        </row>
73        <row>
74          <entry>Pentium II, Pentium III, Pentium 4</entry>
75          <entry>i686-pc-linux-gnu</entry>
76        </row>
77        <row>
78          <entry>Athlon, Duron</entry>
79          <entry>i686-pc-linux-gnu</entry>
80        </row>
81      </tbody>
82
83    </tgroup>
84
85  </table>
86
87</sect1>
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