AM_CONDITIONAL(VDE, test "$vde" = true)
AM_CONDITIONAL(TUNEMU, test "$tunemu" = true)
AM_CONDITIONAL(WITH_SYSTEMD, test "$systemd" = true)
+AM_CONDITIONAL(WITH_LEGACY_PROTOCOL, test "x$enable_legacy_protocol" != "xno")
AC_CACHE_SAVE
tinc_READLINE
tinc_ZLIB
tinc_LZO
+tinc_LZ4
AS_IF([test "x$enable_legacy_protocol" != "xno"],
[AS_IF([test -n "$with_libgcrypt"],