From 9a93b6cf3dd97ca7bcb938f87afeb523d023f807 Mon Sep 17 00:00:00 2001
From: John Baldwin <jhb@FreeBSD.org>
Date: Mon, 30 Jan 2023 09:31:19 -0800
Subject: [PATCH] zfs: Disable -Wunused-variable for environ in main in
 zfs_main.c.

There is an extern declaration of the global variable environ (which
has no portable header that defines it) that is unused on FreeBSD due
to zfs_setproctitle_init() being a stub.

Reviewed by:	emaste
Reported by:	GCC
Differential Revision:	https://reviews.freebsd.org/D38231
---
 cddl/sbin/zfs/Makefile | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/cddl/sbin/zfs/Makefile b/cddl/sbin/zfs/Makefile
index 0babca17e98..aae341f1321 100644
--- a/cddl/sbin/zfs/Makefile
+++ b/cddl/sbin/zfs/Makefile
@@ -77,3 +77,5 @@ CFLAGS+= \
 LIBADD=	jail avl nvpair geom  uutil zfs_core spl tpool zutil zfs m crypto
 LDADD+=	-pthread
 .include <bsd.prog.mk>
+
+CWARNFLAGS.zfs_main.c+=	-Wno-unused-variable