AC_ARG_WITH(monodroid, [ --with-monodroid=yes,no If you want to build the MonoDroid assemblies (defaults to no)], [], [with_monodroid=no])
AC_ARG_WITH(monotouch, [ --with-monotouch=yes,no If you want to build the Xamarin.iOS assemblies (defaults to no)], [], [with_monotouch=no])
AC_ARG_WITH(xammac, [ --with-xammac=yes,no If you want to build the Xamarin.Mac assemblies (defaults to no)], [], [with_xammac=no])
AC_ARG_WITH(monodroid, [ --with-monodroid=yes,no If you want to build the MonoDroid assemblies (defaults to no)], [], [with_monodroid=no])
AC_ARG_WITH(monotouch, [ --with-monotouch=yes,no If you want to build the Xamarin.iOS assemblies (defaults to no)], [], [with_monotouch=no])
AC_ARG_WITH(xammac, [ --with-xammac=yes,no If you want to build the Xamarin.Mac assemblies (defaults to no)], [], [with_xammac=no])