From 53485e08e3d304db4a607506d03504540ab8f796 Mon Sep 17 00:00:00 2001
From: "Sergey V. Lobanov" <sergey@lobanov.in>
Date: Mon, 2 Sep 2024 21:32:03 +0000
Subject: build: fix build for entware (HAVE_GOOD_IFARP detection issue)

Linux kernel before 4.11 has the issue decribed in the commit:
https://github.com/torvalds/linux/commit/2618be7dccf8739b89e1906b64bd8d551af351e6

It fails accel-ppp build on entware. Let's include sys/socket.h to avoid this issue.
All files that use linux/if_arp.h includes sys/socket.h before
---
 accel-pppd/CMakeLists.txt | 1 +
 1 file changed, 1 insertion(+)

diff --git a/accel-pppd/CMakeLists.txt b/accel-pppd/CMakeLists.txt
index 496fbdca..7b626c44 100644
--- a/accel-pppd/CMakeLists.txt
+++ b/accel-pppd/CMakeLists.txt
@@ -60,6 +60,7 @@ ENDIF (HAVE_FREE_FN_T)
 
 INCLUDE (CheckCSourceCompiles)
 CHECK_C_SOURCE_COMPILES("
+#include <sys/socket.h>
 #include <linux/if_arp.h>
 #include <net/ethernet.h>
 int main(void)
-- 
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