+dnl ** .NET interop support?
+dnl --------------------------------------------------------------
+AC_ARG_ENABLE(dotnet,
+[ --enable-dotnet
+ Build .NET interop layer.
+],
+[DotnetSupport=YES; AC_DEFINE(WANT_DOTNET_SUPPORT)],
+[DotnetSupport=NO]
+)
+AC_SUBST(DotnetSupport)
+