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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
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@ -83,3 +83,5 @@ CFLAGS.skein_block.c+= -DSKEIN_LOOP=111
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# To find blake3_impl.c in OpenZFS tree for our somehat ugly blake3_impl_hack.c
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# that's needed until the necessary tweaks can be upstreamed.
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CFLAGS.blake3_impl_hack.c+= -I${OZFS}/module/icp/algs/blake3
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CWARNFLAGS.zfs.c+= ${NO_WDANGLING_POINTER}
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