-AC_ARG_ENABLE(objectio,
-[AC_HELP_STRING([--enable-objectio],
-[Build ObjectIO, a portable GUI library for Haskell. [default=no]])],
-[ if test x"$enableval" = x"yes"; then
- GhcLibsWithObjectIO=YES
- else
- GhcLibsWithObjectIO=NO
- fi
-],
-[GhcLibsWithObjectIO=NO]
-)
-AC_SUBST(GhcLibsWithObjectIO)
-
-dnl ** .NET interop support?
-dnl --------------------------------------------------------------
-AC_ARG_ENABLE(dotnet,
-[AC_HELP_STRING([--enable-dotnet],
-[Build .NET interop layer. [default=no]])],
-[ if test x"$enableval" = x"yes"; then
- DotnetSupport=YES; AC_DEFINE([WANT_DOTNET_SUPPORT], [1], [Define to 1 if you want to include .NET interop support.])
- else
- DotnetSupport=NO
- fi],
-[DotnetSupport=NO]
+AC_ARG_WITH([macosx-deployment-target],
+[AC_HELP_STRING([--with-macosx-deployment-target=VERSION],
+ [Build for Mac OS VERSION and higher (default= version of build host)])],
+[FP_MACOSX_DEPLOYMENT_TARGET="$withval"
+ if test "x$TargetOS_CPP-$TargetVendor_CPP" != "xdarwin-apple"; then
+ # ignore everywhere, but on Mac OS
+ AC_MSG_WARN([--macosx-deployment-target is only available on Mac OS X])
+ FP_MACOSX_DEPLOYMENT_TARGET=none
+ fi],
+[FP_MACOSX_DEPLOYMENT_TARGET=none]