Index: trunk/Ohana/configure.tcsh
===================================================================
--- trunk/Ohana/configure.tcsh	(revision 12160)
+++ trunk/Ohana/configure.tcsh	(revision 12332)
@@ -475,5 +475,5 @@
 Configuration:
   -h, --help              display this help and exit
-  --enable-optimize       enable compiler optimization
+  --enable-optimize       enable compiler optimization (-O2)
   --pedantic              include -Wall -Werror on compilation
 
@@ -490,4 +490,21 @@
   --sysconfdir=DIR       read-only single-machine data [PREFIX/etc]
 
+Makefile flags:
+  CC=options
+  CFLAGS=options
+  CPPFLAGS=options
+  LDFLAGS=options
+
+The following options are silently ignored for compatibility:
+  --enable-maintainer-mode
+  --no-create
+  --no-recursion
+  --sbindir
+  --libexecdir
+  --sharedstatedir
+  --localstatedir
+  --oldincludedir
+  --infodir
+
 EOF
  exit 2;