Index: tools/dev/cc_flags.pl
===================================================================
--- tools/dev/cc_flags.pl	(revision 37600)
+++ tools/dev/cc_flags.pl	(working copy)
@@ -89,7 +89,7 @@
     }
 }
 
-my ($cfile) = grep /\.c$/, @ARGV;
+my ($cfile) = grep /\.[cs]$/, @ARGV;
 
 my ( $inject_point, $where );