git: 47d1e67874fa - main - sys: Disable errors for -Wunused-function on GCC.

From: John Baldwin <jhb_at_FreeBSD.org>
Date: Thu, 30 Mar 2023 22:43:57 UTC 
The branch main has been updated by jhb:

URL: https://cgit.FreeBSD.org/src/commit/?id=47d1e67874fae0e13a4670a5faa97e87d4667140

commit 47d1e67874fae0e13a4670a5faa97e87d4667140
Author:     John Baldwin <jhb@FreeBSD.org>
AuthorDate: 2023-03-30 22:43:48 +0000
Commit:     John Baldwin <jhb@FreeBSD.org>
CommitDate: 2023-03-30 22:43:48 +0000

    sys: Disable errors for -Wunused-function on GCC.
    
    This matches the handling of this warning on clang.
---
 sys/conf/kern.mk | 1 +
 1 file changed, 1 insertion(+)

diff --git a/sys/conf/kern.mk b/sys/conf/kern.mk
index a80d6211c182..9975eea6417a 100644
--- a/sys/conf/kern.mk
+++ b/sys/conf/kern.mk
@@ -74,6 +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
 .if ${COMPILER_VERSION} >= 70100
 CWARNEXTRA+=	-Wno-error=stringop-overflow