lfs-book/chapter06/config-glibc.xml

<sect2><title>&nbsp;</title><para>&nbsp;</para></sect2>

<sect2><title>Configuring Glibc</title>

<para>We need to create the /etc/nsswitch.conf file. Although glibc should 
provide defaults when this file is missing or corrupt, its defaults don't work
well with networking. That is dealt with in a later chapter. Also, our
timezone needs to be set up.</para>

<para>Create a new file <filename>/etc/nsswitch.conf</filename> by running the
following:</para>

<para><screen><userinput>cat &gt; /etc/nsswitch.conf &lt;&lt; "EOF"</userinput>
# Begin /etc/nsswitch.conf

passwd: files
group: files
shadow: files

publickey: files

hosts: files dns
networks: files

protocols: db files
services: db files
ethers: db files
rpc: db files

netgroup: db files

# End /etc/nsswitch.conf
<userinput>EOF</userinput></screen></para>

<para>The <userinput>tzselect</userinput> script has to be run and the 
questions regarding your timezone have to be answered.
When you're done, the script will give the 
location of the needed timezone file.</para>

<para> Create the <filename class="directory">/etc/localtime</filename> symlink
by running:</para>

<para><screen><userinput>ln -sf ../usr/share/zoneinfo/&lt;tzselect's output&gt; /etc/localtime</userinput></screen></para>

<para>tzselect's output can be something like <emphasis>EST5EDT</emphasis> or
<emphasis>Canada/Eastern</emphasis>.</para>

<para>The symlink you'd create with that information would be:</para>

<para><screen><userinput>ln -sf ../usr/share/zoneinfo/EST5EDT /etc/localtime</userinput></screen></para>

<para>Or:</para>

<para><screen><userinput>ln -sf ../usr/share/zoneinfo/Canada/Eastern /etc/localtime </userinput></screen></para>

</sect2>

<sect2><title>&nbsp;</title><para>&nbsp;</para></sect2>

<sect2>
<title>Configuring Dynamic Loader</title>

<para>By default, the dynamic loader
(<filename>/lib/ld-linux.so.2</filename>) searches through <filename
class="directory">/lib</filename> and <filename
class="directory">/usr/lib</filename> for dynamic libraries that are needed
by programs when you run them. However, if there are libraries in
directories other than <filename class="directory">/lib</filename> and
<filename class="directory">/usr/lib</filename>, you need to add them to
the <filename>/etc/ld.so.conf</filename> file for the dynamic
loader to find them. Two directories that are commonly known to contain
additional libraries are <filename
class="directory">/usr/local/lib</filename> and <filename
class="directory">/opt/lib</filename>, so we add those directories to the
dynamic loader's search path.</para>

<para>Create a new file <filename>/etc/ld.so.conf</filename> by running the
following:</para>

<para><screen><userinput>cat &gt; /etc/ld.so.conf &lt;&lt; "EOF"</userinput>
# Begin /etc/ld.so.conf

/usr/local/lib
/opt/lib

# End /etc/ld.so.conf
<userinput>EOF</userinput></screen></para>

</sect2>