diff --git a/configure/CONFIG_SITE b/configure/CONFIG_SITE
index afcf579f0..1abbf5b8c 100644
--- a/configure/CONFIG_SITE
+++ b/configure/CONFIG_SITE
@@ -18,8 +18,7 @@
 #
 
 
-#  The host architecture performing the build,
-#	i.e.: the arch running DCT/getrel/etc.
+#  The host architecture performing the build, in the form
 #       <operating system>-<architecture>[-<alternate compiler>]
 #
 #  Currently Supporting:
@@ -27,6 +26,8 @@
 #	aix-ppc-gnu            (GNU compiler used for host builds)
 #	cygwin-x86             (cygwin compiler used for host builds)
 #	darwin-ppc
+#	darwin-x86
+#	darwin-ppcx86          (Universal binaries for both CPUs)
 #	hpux-parisc            (HP compiler used for host builds)
 #	hpux-parisc-gnu        (GNU compiler used for host builds)
 #	linux-ppc              (GNU compiler used for host builds)
@@ -65,7 +66,6 @@
 #       linux-586     (linux-x86 host)
 #       linux-686     (linux-x86 host)
 #       linux-athlon  (linux-x86 host)
-#       linuxRT-mvme2100
 #       vxWorks-486
 #       vxWorks-68040
 #       vxWorks-68040lc
@@ -75,8 +75,6 @@
 #       vxWorks-ppc603_long
 #       vxWorks-ppc604
 #       vxWorks-ppc604_long
-#       vxWorks6-mv2100
-#       vxWorks6-mv5100
 #       RTEMS-gen68360
 #       RTEMS-mcp750
 #       RTEMS-mvme167
@@ -86,8 +84,6 @@
 #       RTEMS-psim
 #       RTEMS-uC5282
 #
-#  Debugging builds 
-#       vxWorks-68040-debug
 
 # Definitions of CROSS_COMPILER_TARGET_ARCHS in
 # configure/os/CONFIG_SITE.<host>.Common files will