+CHECK_LIBMODPLUG([have_libmodplug=yes], [have_libmodplug=no])
+AC_MSG_CHECKING([which module library to use])
+case $with_modlib in
+none)
+ use_modlib=none
+;;
+no)
+ use_modlib=none
+;;
+modplug)
+ if test x$have_libmodplug = xyes; then
+ use_modlib=modplug
+ else
+ use_modlib=none
+ fi
+;;
+auto)
+ if test x$have_libmodplug = xyes; then
+ use_modlib=modplug
+ else
+ use_modlib=none
+ fi
+;;
+*)
+ AC_MSG_ERROR([Invalid argument to --with-modlib: $with_modlib])
+;;
+esac
+AC_MSG_RESULT([$use_modlib])