--- common.opt.orig	2009-09-15 08:16:15.000000000 -0600
+++ common.opt	2009-09-15 08:19:13.000000000 -0600
@@ -1012,9 +1012,14 @@
 Common Report Var(flag_strict_overflow)
 Treat signed overflow as undefined
 
-fsyntax-only
+;fsyntax-only
+;Common Report Var(flag_syntax_only)
+;Check for syntax errors, then stop
+
+fffigen
 Common Report Var(flag_syntax_only)
-Check for syntax errors, then stop
+Generate .ffi output
+
 
 ftest-coverage
 Common Report Var(flag_test_coverage)