From ede4ae8e25f9fb746a6f4e076d0ef029938d2880 Mon Sep 17 00:00:00 2001
From: Khem Raj <raj.khem@gmail.com>
Date: Tue, 28 Mar 2017 11:46:56 -0700
Subject: [PATCH 4/4] Adjust for linux-kernel headers assumptions on glibc

Fixes build issues e.g.

In file included from /mnt/a/build/tmp-musl/work/cortexa7hf-neon-vfpv4-oe-linux-musleabi/openl2tp/1.8-r0/recipe-sysroot/usr/include/linux/if_pppox.h:24:
/mnt/a/build/tmp-musl/work/cortexa7hf-neon-vfpv4-oe-linux-musleabi/openl2tp/1.8-r0/recipe-sysroot/usr/include/linux/if.h:97:2: error: expected identifier
        IFF_LOWER_UP                    = 1<<16, /* __volatile__ */
        ^

Signed-off-by: Khem Raj <raj.khem@gmail.com>
---
 plugins/ppp_unix.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/plugins/ppp_unix.c b/plugins/ppp_unix.c
index 869066f..5c1e44f 100644
--- a/plugins/ppp_unix.c
+++ b/plugins/ppp_unix.c
@@ -21,6 +21,11 @@
  * Plugin to use the standard UNIX pppd
  */
 
+/* hack to make sure kernel headers understand that libc (musl)
+ * does define IFF_LOWER_UP et al.
+ */
+#define __UAPI_DEF_IF_NET_DEVICE_FLAGS_LOWER_UP_DORMANT_ECHO 0
+
 #include <unistd.h>
 #include <fcntl.h>
 #include <sys/types.h>
-- 
2.12.1