=head1 BUILD SYSTEM OPTIONS
+All of the B<dh_auto_>I<*> debhelper programs sets environment variables
+listed by B<dpkg-buildflags>, unless they are already set. They
+support DEB_BUILD_OPTIONS=noopt too.
+
The following command line options are supported by all of the B<dh_auto_>I<*>
debhelper programs. These programs support a variety of build systems,
and normally heuristically determine which to use, and how to use them.