From bbf5b2759cff0c65b47fd6dbe5fe7341f205ad03 Mon Sep 17 00:00:00 2001
From: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Date: Sat, 11 Dec 2021 22:03:16 +0100
Subject: [PATCH] src/pppoe.h: fix build with musl libc

musl libc defines its own struct ethhdr that conflicts with the kernel
define one. The kernel headers provide a way to suppress its struct
ethhdr. For that to work the libc headers must precede the kernel. Move
the kernel linux/if_ether.h include below libc netinet/if_ether.h. That
fixes the following build failure:

In file included from pppoe.h:133,
                 from debug.c:19:
/home/giuliobenetti/autobuild/run/instance-0/output-1/host/riscv64-buildroot-linux-musl/sysroot/usr/include/netinet/if_ether.h:116:8: error: redefinition of 'struct ethhdr'
  116 | struct ethhdr {
      |        ^~~~~~
In file included from pppoe.h:121,
                 from debug.c:19:
/home/giuliobenetti/autobuild/run/instance-0/output-1/host/riscv64-buildroot-linux-musl/sysroot/usr/include/linux/if_ether.h:163:8: note: originally defined here
  163 | struct ethhdr {
      |        ^~~~~~

Fixes:
 - http://autobuild.buildroot.org/results/ccca18fcbcde65cb6784f5559eac68ca17ab14a3

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
[Upstream status: https://github.com/dfskoll/rp-pppoe/pull/4]
---
 src/pppoe.h | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/src/pppoe.h b/src/pppoe.h
index 4780092..2b08111 100644
--- a/src/pppoe.h
+++ b/src/pppoe.h
@@ -117,10 +117,6 @@ typedef unsigned long UINT32_t;
 #error Could not find a 32-bit integer type
 #endif
 
-#ifdef HAVE_LINUX_IF_ETHER_H
-#include <linux/if_ether.h>
-#endif
-
 #include <netinet/in.h>
 
 #ifdef HAVE_NETINET_IF_ETHER_H
@@ -134,6 +130,10 @@ typedef unsigned long UINT32_t;
 #endif
 #endif
 
+#ifdef HAVE_LINUX_IF_ETHER_H
+#include <linux/if_ether.h>
+#endif
+
 
 
 /* Ethernet frame types according to RFC 2516 */
-- 
2.33.0