git: 2c91d5899a90 - stable/12 - gcc9: quiet Waddress-of-packed-member for kernel build

The branch stable/12 has been updated by jhb:

URL: https://cgit.FreeBSD.org/src/commit/?id=2c91d5899a9004bc281063dc6439cd17b05f71b2

commit 2c91d5899a9004bc281063dc6439cd17b05f71b2
Author:     Ryan Libby <rlibby@FreeBSD.org>
AuthorDate: 2019-12-21 02:43:37 +0000
Commit:     John Baldwin <jhb@FreeBSD.org>
CommitDate: 2023-03-22 22:21:11 +0000

    gcc9: quiet Waddress-of-packed-member for kernel build
    
    This is lame, but it's what we already do for the clang build.  We take
    misaligned pointers into network header structures in many places.
    
    Reviewed by:    ian
    Sponsored by:   Dell EMC Isilon
    Differential Revision:  https://reviews.freebsd.org/D22876
    
    (cherry picked from commit 77acc3cfbcfbb2f66c683706e3b9e39d56c000fa)
---
 sys/conf/kern.mk | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/sys/conf/kern.mk b/sys/conf/kern.mk
index 243419103b22..4a36aae4db94 100644
--- a/sys/conf/kern.mk
+++ b/sys/conf/kern.mk
@@ -82,6 +82,9 @@ CWARNEXTRA+=	-Wno-error=memset-elt-size
 .if ${COMPILER_VERSION} >= 80000
 CWARNEXTRA+=	-Wno-error=packed-not-aligned
 .endif
+.if ${COMPILER_VERSION} >= 90100
+CWARNEXTRA+=	-Wno-address-of-packed-member
+.endif
 .else
 # For gcc 4.2, eliminate the too-often-wrong warnings about uninitialized vars.
 CWARNEXTRA?=	-Wno-uninitialized