From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Robbie Harwood <rharwood@redhat.com>
Date: Thu, 5 May 2022 18:01:05 -0400
Subject: [PATCH] rpm-sort: add prereqs for declaration of strchrnul()

Signed-off-by: Robbie Harwood <rharwood@redhat.com>
---
 util/grub-rpm-sort.c | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/util/grub-rpm-sort.c b/util/grub-rpm-sort.c
index 8345944105..71d038bb69 100644
--- a/util/grub-rpm-sort.c
+++ b/util/grub-rpm-sort.c
@@ -1,13 +1,17 @@
+#define _GNU_SOURCE 1
+
 #include <config.h>
+
+#include <argp.h>
+#include <assert.h>
+#include <errno.h>
 #include <grub/types.h>
 #include <grub/util/misc.h>
+#include <rpm/rpmlib.h>
 #include <stdio.h>
 #include <stdlib.h>
+#include <string.h>
 #include <unistd.h>
-#include <errno.h>
-#include <assert.h>
-#include <argp.h>
-#include <rpm/rpmlib.h>
 
 static size_t
 read_file (const char *input, char **ret)