add a note fore uClinux users
diff --git a/Makefile b/Makefile
index 6a3a603..18b1939 100644
--- a/Makefile
+++ b/Makefile
@@ -20,6 +20,8 @@
# Or, you can save all your settings into the local 'config.mk' file.
# Just use the same syntax as above for the Makefile.
#
+# uClinux Users: make sure you add -DUCLINUX to your CFLAGS
+#
# Note: If you override a variable from the commandline all
# assignments to it in the Makefiles will be ignored. To set it both
# in the commandline and in the Makefiles use a dummy variable like in