Added an explanation for the make command in the Chapter 5 Util-linux-ng instructions

git-svn-id: http://svn.linuxfromscratch.org/LFS/trunk/BOOK@8623 4aa44e1e-78dd-0310-a6d2-fbcd4c07a689

chapter05/util-linux-ng.xml

@@ -53,6 +53,21 @@
 <screen><userinput remap="make">make BLKID_LIBS="-lblkid -luuid" -C mount mount umount
 make -C text-utils more</userinput></screen>
 
+    <variablelist>
+      <title>The meaning of the make parameter:</title>
+
+      <varlistentry>
+        <term><parameter>BLKID_LIBS="-lblkid -luuid"</parameter></term>
+        <listitem>
+          <para>When building only a subset of the package, the
+          <filename class="libraryfile">libuuid.so</filename> library is not
+          pulled into the build as it is supposed to. This command overrides
+          the default from the <filename>Makefile</filename>.</para>
+        </listitem>
+      </varlistentry>
+
+    </variablelist>
+
     <!-- Not sure why this is in there. There is no test suite. Though
          running 'make check' may build these programs, there is no
          testing done.