extconf.rb in bindex-0.2.0

- old
+ new

@@ -15,9 +15,10 @@
   when /2\.1\.*/
     $CFLAGS   << " -D RUBY_21"
     $INCFLAGS << " -I./ruby_21/"
   end
 
+  $CFLAGS << " -Wall"
   $CFLAGS << " -g3 -O0" if ENV["DEBUG"]
 
   create_makefile("bindex/cruby")
 else
   IO.write(File.expand_path("../Makefile", __FILE__), <<-END)