Index: pch.jam
===================================================================
RCS file: /cvsroot/boost/boost/tools/build/v2/tools/pch.jam,v
retrieving revision 1.3
diff -u -r1.3 pch.jam
--- pch.jam	24 Sep 2006 09:38:46 -0000	1.3
+++ pch.jam	24 Sep 2006 09:40:13 -0000
@@ -50,6 +50,9 @@
 
     rule run ( project name ? : property-set : sources * )
     {
+        # The two sources are cpp file and PCHEADER, but they
+        # can be passed in any order. Figure out which source
+        # is what.
         local cpp = $(sources[2]) ;
         local h   = $(sources[1]) ;
         if [ $(sources[2]).type ] = PCHEADER