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Date: Sun, 22 Dec 2019 00:06:47 -0600
From: "A. Wilcox" <>
Cc: "A. Wilcox" <>
Subject: [PATCH] netinet/ip.h: Add UAPI definition guard for iphdr

This ensures that the musl definition of 'struct iphdr' does not conflict
with the Linux kernel UAPI definition of it.

Some software, i.e. net-tools, will not compile against 5.4 kernel headers
without this patch and the corresponding Linux kernel patch.
 include/netinet/ip.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/include/netinet/ip.h b/include/netinet/ip.h
index 8b6d7fef..0ae132a5 100644
--- a/include/netinet/ip.h
+++ b/include/netinet/ip.h
@@ -190,6 +190,8 @@ struct ip_timestamp {
 #define	IP_MSS		576
+#define __UAPI_DEF_IPHDR	0
 #ifdef __cplusplus

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