Added explanation why we touch /etc/ld.so.conf

git-svn-id: http://svn.linuxfromscratch.org/LFS/trunk/BOOK@135 4aa44e1e-78dd-0310-a6d2-fbcd4c07a689

chapter06/glibc-exp.sgml

@@ -1,6 +1,14 @@
 <sect2>
 <title>Command explanations</title>
 
+<para>
+<userinput>touch /etc/ld.so.conf</userinput> One of the final steps of
+the Glibc installation is running ldconfig to update the dynamic loader
+cache. If this file isn't present Glibc will abort with an error that it
+can't read the file. So we create an empty file for it (empty file will
+have Glibc default to using /lib and /usr/lib which is fine right now).
+</para>
+
 <para>
 <userinput>--enable-add-ons:</userinput> This enabled the add-ons that
 we install with Glibc: linuxthreads