[PATCH] vmcore-dmesg: Define _GNU_SOURCE

[Khem Raj]

loff_t is guarded with _GNU_SOURCE on some C library implementations
e.g. musl since this type is not defined by POSIX. Define _GNU_SOURCE to
include this define, it should help compiling on musl while nothing
changes for glibc based systems since there _GNU_SOURCE is already
defined

Signed-off-by: Khem Raj <raj.khem at gmail.com>
---
 vmcore-dmesg/vmcore-dmesg.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/vmcore-dmesg/vmcore-dmesg.c b/vmcore-dmesg/vmcore-dmesg.c
index 0364636..a8f56df 100644
--- a/vmcore-dmesg/vmcore-dmesg.c
+++ b/vmcore-dmesg/vmcore-dmesg.c
@@ -1,4 +1,5 @@
 #define _XOPEN_SOURCE 600
+#define _GNU_SOURCE
 #define _LARGEFILE_SOURCE 1
 #define _FILE_OFFSET_BITS 64
 #include <endian.h>
-- 
2.7.0