--- vmcore-dmesg/vmcore-dmesg.c.orig	2015-06-26 06:34:07.265191695 +0200
+++ vmcore-dmesg/vmcore-dmesg.c	2015-06-26 06:34:44.306162445 +0200
@@ -12,7 +12,9 @@
 #include <limits.h>
 #include <sys/types.h>
 #include <sys/stat.h>
+#define _GNU_SOURCE	/* loff_t with musl */
 #include <fcntl.h>
+#undef _GNU_SOURCE
 #include <elf.h>
 #include <stdbool.h>
 #include <inttypes.h>