source: cross-tools/x86_64/flags.xml@ 5427d7e

Last change on this file since 5427d7e was f32f537, checked in by Jim Gifford <clfs@…>, 19 years ago

r788@server (orig r786): jim | 2005-12-01 12:07:35 -0800

r851@server: jim | 2005-12-01 12:07:08 -0800
Text updates from G. Moko. Thank You


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File size: 1.7 KB
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[bf8c11f]1<?xml version="1.0" encoding="ISO-8859-1"?>
2<!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.4//EN"
3 "http://www.oasis-open.org/docbook/xml/4.4/docbookx.dtd" [
4 <!ENTITY % general-entities SYSTEM "../../general.ent">
5 %general-entities;
6]>
7
8<sect1 id="ch-cross-tools-flags">
9 <?dbhtml filename="flags.html"?>
10
11 <title>Build Flags</title>
12
[f32f537]13 <para os="a">We will need to setup target specific flags for the compiler
[bf8c11f]14 and linkers.</para>
15
[f32f537]16<screen os="b"><userinput>export BUILD32="-m32"
[bf8c11f]17export BUILD64="-m64"</userinput></screen>
18
[f32f537]19 <para os="c">You will need to set your host target triplet for 32 bits:</para>
[bf8c11f]20
[f32f537]21<screen os="d"><userinput>export LFS_TARGET32="i686-pc-linux-gnu"</userinput></screen>
[bf8c11f]22
[f32f537]23 <para os="e">Let's perform a sanity check to prevent build issues. If our LFS_HOST matches our
[bf8c11f]24 target, we will get some failures during our cross-compile:</para>
25
[f32f537]26<screen os="f"><userinput>if [ "${LFS_HOST}" = "${LFS_TARGET32}" ]; then \
[bf8c11f]27 echo "Host and Target can't be the same." ; fi</userinput></screen>
28
[f32f537]29 <para os="g">If the above test gave you "Host and Target can't be the same", you will need to change your LFS_HOST to a
[bf8c11f]30 a different target triplet:</para>
31
[f32f537]32<screen os="h"><userinput>export LFS_HOST="`echo ${MACHTYPE} | sed -e 's/unknown/cross/g' -e 's/-pc-/-cross-/g'`"</userinput></screen>
[bf8c11f]33
[f32f537]34 <para os="i">Lets add the build flags to <filename>~/.bashrc</filename> to
[bf8c11f]35 prevent issues if we stop and come back later.</para>
36
[f32f537]37<screen os="j"><userinput>echo export BUILD32=\""${BUILD32}\"" &gt;&gt; ~/.bashrc
[bf8c11f]38echo export BUILD64=\""${BUILD64}\"" &gt;&gt; ~/.bashrc
39echo export LFS_TARGET32=\""${LFS_TARGET32}\"" &gt;&gt; ~/.bashrc
40echo export LFS_HOST=\""${LFS_HOST}\"" &gt;&gt; ~/.bashrc</userinput></screen>
41
42</sect1>
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