-# Specify if we want to build with Oliver's networking support
-# default to with_network=yes
-AC_ARG_WITH(network_olk, [ --with-network-olk Include Oliver's multi-pilot networking support])
-if test "x$with_network_olk" = "xno" ; then
- echo "Building without Oliver's multi-pilot network support"
-else
- echo "Building with Oliver's multi-pilot network support"
- AC_DEFINE([FG_NETWORK_OLK], 1, [Define to build with Oliver's networking])
-fi
-AM_CONDITIONAL(ENABLE_NETWORK_OLK, test "x$with_network_olk" != "xno")
-
-
-# Specify if we want to use WeatherCM instead of FGEnvironment.
-# default to with_weathercm=no
-AC_ARG_WITH(new-environment, [ --with-weathercm Use WeatherCM instead of FGEnvironment])
-if test "x$with_weathercm" = "xyes" ; then
- echo "Building with WeatherCM"
- AC_DEFINE([FG_WEATHERCM], 1,
- [Define to build with Christian Mayer's weather code])
+AC_ARG_ENABLE(sp_fdms, [ --enable-sp-fdms Include special purpose Flight Models], [enable_sp_fdms="$enableval"] )
+if test "x$enable_sp_fdms" != "xno"; then
+ AC_DEFINE([ENABLE_SP_FDM], 1, [Define to include special purpose FDMs])