configure first checks whether it is possible to compile IPX code with
Glibc headers. If it fails, next check determines whether direct inclusion
of <linux/ipx.h> works.
diff --git a/include/acconfig.h b/include/acconfig.h
index 3138af1..35dc8e0 100644
--- a/include/acconfig.h
+++ b/include/acconfig.h
@@ -59,3 +59,10 @@
/* Define if we want to use ncurses instead of the TTY terminal */
#undef WINE_NCURSES
+
+/* Define if IPX should use netipx/ipx.h from libc */
+#undef HAVE_IPX_GNU
+
+/* Define if IPX includes are taken from Linux kernel */
+#undef HAVE_IPX_LINUX
+
