git: 3b3762c34e2f - main - sys: Enable -Wunused-but-set-variable for GCC.

From: John Baldwin <jhb_at_FreeBSD.org>
Date: Mon, 10 Apr 2023 17:44:03 UTC 
The branch main has been updated by jhb:

URL: https://cgit.FreeBSD.org/src/commit/?id=3b3762c34e2f64671637a527fc11819ab26370fe

commit 3b3762c34e2f64671637a527fc11819ab26370fe
Author:     John Baldwin <jhb@FreeBSD.org>
AuthorDate: 2023-04-10 17:36:33 +0000
Commit:     John Baldwin <jhb@FreeBSD.org>
CommitDate: 2023-04-10 17:36:33 +0000

    sys: Enable -Wunused-but-set-variable for GCC.
    
    It has been enabled for clang for a while now.
    
    Reviewed by:    emaste
    Differential Revision:  https://reviews.freebsd.org/D39358
---
 sys/conf/kern.mk | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/sys/conf/kern.mk b/sys/conf/kern.mk
index 9975eea6417a..8676cb525db4 100644
--- a/sys/conf/kern.mk
+++ b/sys/conf/kern.mk
@@ -74,8 +74,7 @@ CWARNEXTRA?=	-Wno-error=address				\
 		-Wno-error=sequence-point			\
 		-Wno-error=shift-overflow			\
 		-Wno-error=tautological-compare			\
-		-Wno-error=unused-function			\
-		-Wno-unused-but-set-variable
+		-Wno-error=unused-function
 .if ${COMPILER_VERSION} >= 70100
 CWARNEXTRA+=	-Wno-error=stringop-overflow
 .endif