source: BOOK/final-preps/x86_64/variables.xml@ e8cb61f

<?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-final-preps-variables">
  <?dbhtml filename="variables.html"?>

  <title>Build Variables</title>

  <bridgehead renderas="sect4">Setting Host and Target</bridgehead>

    <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
    href="../x86/variables.xml"
    xpointer="xpointer(//*[@os='a'])"/>

    <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
    href="../x86/variables.xml"
    xpointer="xpointer(//*[@os='b'])"/>

    <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
    href="../x86/variables.xml"
    xpointer="xpointer(//*[@os='c'])"/>

<screen os="d"><userinput>export CLFS_TARGET="x86_64-unknown-linux-gnu"</userinput></screen>

  <para os="e">Now set the target triplet for 32 bits:</para>

<screen os="f"><userinput>export CLFS_TARGET32="i686-pc-linux-gnu"</userinput></screen>

  <para os="g">We will need to setup target-specific flags for the compiler
  and linker:</para>

<screen os="h"><userinput>export BUILD32="-m32"
export BUILD64="-m64"</userinput></screen>

  <bridgehead renderas="sect4">Copy settings to Environment</bridgehead>

  <para os="i">Now add the host and target variables, and compiler and linker
  flags, to <filename>~/.bashrc</filename>, just in case you have to exit and
  restart building later:</para>

<screen os="j"><userinput>cat &gt;&gt; ~/.bashrc &lt;&lt; EOF
export CLFS_HOST="${CLFS_HOST}"
export CLFS_TARGET="${CLFS_TARGET}"
export CLFS_TARGET32="${CLFS_TARGET32}"
export BUILD32="${BUILD32}"
export BUILD64="${BUILD64}"
EOF</userinput></screen>

</sect1>