AC_MSG_ERROR([GHC is required unless bootstrapping from .hc files.])
fi;
-dnl ** Enable multi-thread friendly RTS?
+dnl ** --enable-threaded-rts (not used any more)
dnl --------------------------------------------------------------
AC_ARG_ENABLE(threaded-rts,
[AC_HELP_STRING([--enable-threaded-rts],
-[Support better interop with OS threads. [default=no]])],
+[DEPRECATED (backwards compatibility only). [default=no]])],
[ if test x"$enableval" = x"yes"; then
ThreadedRts=YES
else