| 1 | <?xml version="1.0" encoding="ISO-8859-1"?>
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| 2 | <!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.4//EN"
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| 3 | "http://www.oasis-open.org/docbook/xml/4.4/docbookx.dtd" [
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| 4 | <!ENTITY % general-entities SYSTEM "../../general.ent">
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| 5 | %general-entities;
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| 6 | ]>
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| 7 |
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| 8 | <sect1 id="ch-boot-settingenviron">
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| 9 | <?dbhtml filename="settingenvironment.html"?>
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| 10 |
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| 11 | <title>Setting Up the Environment</title>
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| 12 |
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| 13 | <para>The new instance of the shell is a <emphasis>non-login</emphasis>
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| 14 | shell, will read <filename>.bash_profile</filename> file. Create the
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| 15 | <filename>.bash_profile</filename> file now:</para>
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| 16 |
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| 17 | <screen><userinput>cat > ${LFS}/root/.bash_profile << "EOF"
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| 18 | <literal>PS1='\u:\w\$ '
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| 19 | LC_ALL=POSIX
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| 20 | PATH=/bin:/usr/bin:/sbin:/usr/sbin:/tools/bin:/tools/sbin
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| 21 | export LC_ALL PATH PS1</literal>
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| 22 | EOF</userinput></screen>
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| 23 |
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| 24 | <para>The <envar>LC_ALL</envar> variable controls the localization of
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| 25 | certain programs, making their messages follow the conventions of a
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| 26 | specified country. If the host system uses a version of Glibc older
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| 27 | than 2.2.4, having <envar>LC_ALL</envar> set to something other than
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| 28 | <quote>POSIX</quote> or <quote>C</quote> (during this chapter) may cause
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| 29 | issues if you exit the chroot environment and wish to return later.
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| 30 | Setting <envar>LC_ALL</envar> to <quote>POSIX</quote> or <quote>C</quote>
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| 31 | (the two are equivalent) ensures that everything will work as expected
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| 32 | in the chroot environment.</para>
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| 33 |
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| 34 | <para>By putting <filename class="directory">/tools/bin</filename> at
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| 35 | the end of the standard <envar>PATH</envar>, all the programs installed in
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| 36 | <xref linkend="chapter-temporary-tools"/> are only picked up by the shell
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| 37 | if they have not yet been built on the target system. This configuration
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| 38 | forces use of the final system binaries as they are built over the
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| 39 | temporary-tools, minimising the chance final system programs being built
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| 40 | against the temporary-tools.</para>
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| 41 |
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| 42 | </sect1>
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