[OpenWrt-Devel] [PATCH] sysupgrade: Add missing _GNU_SOURCE define

[Rosen Penev]

Fixes compilation problem:

error: implicit declaration of function 'asprintf'; did you mean 'vsprintf'?
[-Werror=implicit-function-declaration]
   57 |   if (asprintf(&name, "%s%s", prefix, blobmsg_name(option)) <= 0)
      |       ^~~~~~~~
      |       vsprintf

Signed-off-by: Rosen Penev <rosenp at gmail.com>
---
 sysupgrade.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/sysupgrade.c b/sysupgrade.c
index a5bad9a..7f3bbe8 100644
--- a/sysupgrade.c
+++ b/sysupgrade.c
@@ -17,10 +17,13 @@
 #include "watchdog.h"
 #include "sysupgrade.h"
 
-#include <ctype.h>
+#ifndef _GNU_SOURCE
+#define _GNU_SOURCE
+#endif
 #include <stdio.h>
 #include <stdlib.h>
 #include <unistd.h>
+#include <ctype.h>
 
 #include <libubox/blobmsg.h>
 
-- 
2.17.1


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