git: 7b9e74754674 - stable/13 - libsa: Disable -Wdangling-pointer for zfs.c.

From: John Baldwin <jhb_at_FreeBSD.org>
Date: Wed, 03 May 2023 00:29:31 UTC
The branch stable/13 has been updated by jhb:

URL: https://cgit.FreeBSD.org/src/commit/?id=7b9e74754674be7afa1059f4ca66d6c6723efdc9

commit 7b9e74754674be7afa1059f4ca66d6c6723efdc9
Author:     John Baldwin <jhb@FreeBSD.org>
AuthorDate: 2022-12-05 00:27:22 +0000
Commit:     John Baldwin <jhb@FreeBSD.org>
CommitDate: 2023-05-03 00:03:01 +0000

    libsa: Disable -Wdangling-pointer for zfs.c.
    
    GCC 12 warns about a dangling pointer to 'objid' in
    zfs_bootenv_initial().  However, this appears to be a false positive
    as the pointer to 'objid' is only passed to zfs_lookup_dataset() but
    not saved anywhere that outlives the lifetime of the
    zfs_bootenv_initial() function.
    
    Reviewed by:    imp, emaste
    Differential Revision:  https://reviews.freebsd.org/D37533
    
    (cherry picked from commit 0163de282e3195a1845f75b486adb3e1e7580199)
---
 stand/libsa/zfs/Makefile.inc | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/stand/libsa/zfs/Makefile.inc b/stand/libsa/zfs/Makefile.inc
index f0d8129be9e1..4eb89fb80b2c 100644
--- a/stand/libsa/zfs/Makefile.inc
+++ b/stand/libsa/zfs/Makefile.inc
@@ -42,3 +42,5 @@ CFLAGS+=	-I${SYSDIR}/contrib/openzfs/include/os/freebsd/zfs
 CFLAGS.zfs.c+=	-I${SYSDIR}/cddl/contrib/opensolaris/common/lz4
 
 CFLAGS+=	-Wformat -Wall
+
+CWARNFLAGS.zfs.c+= ${NO_WDANGLING_POINTER}