Clearified some issues about building in parallel

git-svn-id: http://svn.linuxfromscratch.org/LFS/trunk/BOOK@9339 4aa44e1e-78dd-0310-a6d2-fbcd4c07a689

chapter01/changelog.xml

@@ -40,6 +40,11 @@
     <listitem>
       <para>2010-07-18</para>
       <itemizedlist>
+         <listitem>
+           <para>[bdubbs] - Updated discussion of building packages
+           in parallel. Fixes 
+           <ulink url="&lfs-ticket-root;2712">#2712</ulink>.</para>
+         </listitem>
          <listitem>
            <para>[bdubbs] - Updated dependencies for GRUB and Glibc.
            Thanks to splotz90 for the patch. Fixes 

chapter04/aboutsbus.xml

@@ -45,7 +45,7 @@
   <command>make</command> program how many processors are available.  For
   instance, a Core2Duo can support two simultaneous processes with:</para>
 
-  <screen><userinput>set MAKEFLAGS='-j 2'</userinput></screen>
+  <screen><userinput>export MAKEFLAGS='-j 2'</userinput></screen>
 
   <para>or just building with:</para>
 

chapter06/introduction.xml

@@ -39,9 +39,9 @@
   <para>The order that packages are installed in this chapter needs to be
   strictly followed to ensure that no program accidentally acquires a path
   referring to <filename class="directory">/tools</filename> hard-wired into
-  it. For the same reason, do not compile packages in parallel. Compiling in
-  parallel may save time (especially on dual-CPU machines), but it could result
-  in a program containing a hard-wired path to <filename
+  it.  For the same reason, do not compile separate packages in parallel.
+  Compiling in parallel may save time (especially on dual-CPU machines), but it
+  could result in a program containing a hard-wired path to <filename
   class="directory">/tools</filename>, which will cause the program to stop
   working when that directory is removed.</para>