From 17202b31cf1229ad60e606923f723445dded7116 Mon Sep 17 00:00:00 2001
From: Xadhoom <>
Date: Fri, 1 Jan 2021 18:53:59 +0000
Subject: [PATCH] Permanently disable LWIP_PROVIDE_ERRNO

---
 src/include/lwip/errno.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/include/lwip/errno.h b/src/include/lwip/errno.h
index 9f59afc8..a1dd5b2b 100644
--- a/src/include/lwip/errno.h
+++ b/src/include/lwip/errno.h
@@ -44,6 +44,7 @@ extern "C" {
 #endif
 
 #ifdef LWIP_PROVIDE_ERRNO
+#error "This fork does not support configurations with LWIP_PROVIDE_ERRNO"
 
 #define  EPERM            1  /* Operation not permitted */
 #define  ENOENT           2  /* No such file or directory */