From f8e5fbb33690b516b8516590def5136e6619de4c Mon Sep 17 00:00:00 2001
From: Dario Binacchi <dario.binacchi@amarulasolutions.com>
Date: Tue, 17 Sep 2024 21:48:01 +0200
Subject: [PATCH] Fix uclibc build issue

This patch fixes the following compilation error raised by the bump to
version 1.13.1 in Buildroot [1] using uclibc as the C library for the
cross-compilation toolchain:

net.c: In function 'babel_send':
net.c:199:27: error: 'IPV6_DONTFRAG' undeclared (first use in this function)
  199 |         cmsg->cmsg_type = IPV6_DONTFRAG;;

[1] https://patchwork.ozlabs.org/project/buildroot/patch/20240917201030.11583-1-dario.binacchi@amarulasolutions.com/
Signed-off-by: Dario Binacchi <dario.binacchi@amarulasolutions.com>
---
 net.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/net.c b/net.c
index 7a7b5784..30de3daf 100644
--- a/net.c
+++ b/net.c
@@ -37,6 +37,10 @@ THE SOFTWARE.
 #include <arpa/inet.h>
 #include <errno.h>
 
+#if defined(__UCLIBC__)
+#include <linux/in6.h>
+#endif
+
 #include "babeld.h"
 #include "util.h"
 #include "net.h"