| 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-partitioning-aboutlfs">
|
|---|
| 9 | <?dbhtml filename="aboutlfs.html"?>
|
|---|
| 10 |
|
|---|
| 11 | <title>Setting The $LFS Variable</title>
|
|---|
| 12 |
|
|---|
| 13 | <para>Throughout this book, the environment variable <envar>LFS</envar> will
|
|---|
| 14 | be used several times. You should ensure that this variable is always defined
|
|---|
| 15 | throughout the LFS build process. It should be set to the name of the
|
|---|
| 16 | directory where you will be building your LFS system - we will use
|
|---|
| 17 | <filename class="directory">/mnt/lfs</filename> as an example, but the
|
|---|
| 18 | directory choice is up to you. If you are building LFS on a separate
|
|---|
| 19 | partition, this directory will be the mount point for the partition.
|
|---|
| 20 | Choose a directory location and set the variable with the
|
|---|
| 21 | following command:</para>
|
|---|
| 22 |
|
|---|
| 23 | <screen role="nodump"><userinput>export LFS=<replaceable>/mnt/lfs</replaceable></userinput></screen>
|
|---|
| 24 |
|
|---|
| 25 | <para>Having this variable set is beneficial in that commands such as
|
|---|
| 26 | <command>mkdir -v $LFS/tools</command> can be typed literally. The shell
|
|---|
| 27 | will automatically replace <quote>$LFS</quote> with
|
|---|
| 28 | <quote>/mnt/lfs</quote> (or whatever the variable was set to) when it
|
|---|
| 29 | processes the command line.</para>
|
|---|
| 30 |
|
|---|
| 31 | <caution>
|
|---|
| 32 | <para>Do not forget to check that <envar>LFS</envar> is set whenever
|
|---|
| 33 | you leave and reenter the current working environment (such as when doing a
|
|---|
| 34 | <command>su</command> to <systemitem class="username">root</systemitem> or
|
|---|
| 35 | another user). Check that the <envar>LFS</envar> variable is set up
|
|---|
| 36 | properly with:</para>
|
|---|
| 37 |
|
|---|
| 38 | <screen role="nodump"><userinput>echo $LFS</userinput></screen>
|
|---|
| 39 |
|
|---|
| 40 | <para>Make sure the output shows the path to your LFS system's build
|
|---|
| 41 | location, which is <filename class="directory">/mnt/lfs</filename> if the
|
|---|
| 42 | provided example was followed. If the output is incorrect, use the command
|
|---|
| 43 | given earlier on this page to set <envar>$LFS</envar> to the correct
|
|---|
| 44 | directory name.</para>
|
|---|
| 45 | </caution>
|
|---|
| 46 |
|
|---|
| 47 | <note><para>One way to ensure that the <envar>LFS</envar> variable is always
|
|---|
| 48 | set is to edit the <filename>.bash_profile</filename> file in both your
|
|---|
| 49 | personal home directory and in <filename>/root/.bash_profile</filename> and
|
|---|
| 50 | enter the export command above. In addition, the shell specified in the
|
|---|
| 51 | <filename>/etc/passwd</filename> file for all users that need the
|
|---|
| 52 | <envar>LFS</envar> variable needs to be bash to ensure that the
|
|---|
| 53 | <filename>/root/.bash_profile</filename> file is incorporated as a part of
|
|---|
| 54 | the login process.</para></note>
|
|---|
| 55 |
|
|---|
| 56 | </sect1>
|
|---|
