source: clfs-embedded/BOOK/cross-tools/mips/variables.xml @ 85d173b

Last change on this file since 85d173b was 85d173b, checked in by Andrew Bradford <bradfa@…>, 13 years ago

Added MIPS choices to enable --disable-multlib

Only needed to add choice of floating point (soft or hard).

  • Property mode set to 100644
File size: 3.7 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  You will need to set the target triplet for the target architecture, the MIPS
18  level, and CPU endianess. If you do not know what triplet or level you want,
19  you can use the table at the bottom of this page as a reference. Set
20  the command using the method listed below:</para>
21
22  <xi:include xmlns:xi="http://www.w3.org/2003/XInclude"
23  href="../common/variables.xml"
24  xpointer="xpointer(//*[@os='b'])"/>
25
26  <xi:include xmlns:xi="http://www.w3.org/2003/XInclude"
27  href="../common/variables.xml"
28  xpointer="xpointer(//*[@os='c'])"/>
29
30<screen os="d"><userinput>export CLFS_ARCH=$(echo ${CLFS_TARGET} | sed -e 's/\(mips\)\(64\)\?\(el\)\?-.*/\1\3/')
31export CLFS_ENDIAN=$(echo ${CLFS_ARCH} | sed -e 's/mipsel/little/' -e 's/mips/big/')</userinput></screen>
32
33  <para os="m1">Now you will need to set the MIPS LEVEL. This determines how your
34uClibc is built. There are currently 5 MIPS ISA Levels. To keep things simple
35we are only using 2. For more information, go to
36<ulink url="http://www.linux-mips.org/wiki/Instruction_Set_Architecture"/></para>
37
38<screen os="m2"><userinput>export CLFS_MIPS_LEVEL="<replaceable>[mips level]</replaceable>"</userinput></screen>
39
40  <para os="m3">We also need to select the floating point capability of the CPU.
41  If the CPU has built-in hardware for performing floating point calculations,
42  choose "hard", otherwise choose "soft":</para>
43
44<screen os="m4"><userinput>export CLFS_FLOAT="<replaceable>[hard or soft]</replaceable>"</userinput></screen>
45
46  <xi:include xmlns:xi="http://www.w3.org/2003/XInclude"
47  href="../common/variables.xml"
48  xpointer="xpointer(//*[@os='g'])"/>
49
50<screen os="h"><userinput>echo export CLFS_HOST=\""${CLFS_HOST}\"" &gt;&gt; ~/.bashrc
51echo export CLFS_TARGET=\""${CLFS_TARGET}\"" &gt;&gt; ~/.bashrc
52echo export CLFS_ARCH=\""${CLFS_ARCH}\"" &gt;&gt; ~/.bashrc
53echo export CLFS_ENDIAN=\""${CLFS_ENDIAN}\"" &gt;&gt; ~/.bashrc
54echo export CLFS_MIPS_LEVEL=\""${CLFS_MIPS_LEVEL}\"" &gt;&gt; ~/.bashrc
55echo export CLFS_FLOAT=\""${CLFS_FLOAT}\"" &gt;&gt; ~/.bashrc</userinput></screen>
56
57  <table os="i">
58    <title>Processor Type and  Target Triplets</title>
59    <?dbfo table-width="5.5in" ?>
60
61    <tgroup cols="2">
62
63      <colspec colnum="1" colwidth="2in"   colname="Processor"/>
64      <colspec colnum="2" colwidth="2.5in" colname="Triplet"/>
65      <colspec colnum="3" colwidth="1in"   colname="MIPS Level"/>
66
67      <thead>
68        <row>
69          <entry>Processor</entry>
70          <entry>Target Triplet</entry>
71          <entry>MIPS Level</entry>
72        </row>
73      </thead>
74
75      <tbody>
76        <row>
77          <entry>MIPS 32 bits Little Endian</entry>
78          <entry>mipsel-unknown-linux-uclibc</entry>
79          <entry>1</entry>
80        </row>
81        <row>
82          <entry>MIPS 32 bits Big Endian</entry>
83          <entry>mips-unknown-linux-uclibc</entry>
84          <entry>1</entry>
85        </row>
86        <row>
87          <entry>MIPS 64 bits Little Endian</entry>
88          <entry>mips64el-unknown-linux-uclibc</entry>
89          <entry>3</entry>
90        </row>
91        <row>
92          <entry>MIPS 64 bits Big Endian</entry>
93          <entry>mips64-unknown-linux-uclibc</entry>
94          <entry>3</entry>
95        </row>
96      </tbody>
97
98    </tgroup>
99
100  </table>
101
102</sect1>
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