+dnl
+dnl Simple Generational checks (sgen)
+dnl
+SGEN_DEFINES=
+AC_ARG_WITH(sgen, [ --with-sgen=yes,no Extra Generational GC, default=yes],[buildsgen=$with_sgen],[buildsgen=yes])
+if test x$buildsgen = xyes; then
+ if $sgen_supported; then
+ SGEN_DEFINES="-DHAVE_SGEN_GC -DHAVE_MOVING_COLLECTOR -DHAVE_WRITE_BARRIERS"
+ gc_msg="sgen and $gc_msg"
+ else
+ buildsgen=no
+ AC_MSG_WARN("Sgen is not supported on this platform")
+ fi
+fi
+AC_SUBST(SGEN_DEFINES)
+AM_CONDITIONAL(SUPPORT_SGEN, test x$buildsgen = xyes)
+