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Subject: Re: svn commit: r337674 -
 head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/sys
To: Matt Macy <mmacy@FreeBSD.org>, src-committers@freebsd.org,
 svn-src-all@freebsd.org, svn-src-head@freebsd.org
References: <201808120209.w7C297Ub018593@repo.freebsd.org>
From: John Baldwin <jhb@FreeBSD.org>
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Date: Wed, 15 Aug 2018 07:45:02 +0100
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On 8/12/18 3:09 AM, Matt Macy wrote:
> Author: mmacy
> Date: Sun Aug 12 02:09:06 2018
> New Revision: 337674
> URL: https://svnweb.freebsd.org/changeset/base/337674
> 
> Log:
>   Restore legacy dnode_phys layout on tier 2 arches
>   
>   Evidently gcc4 doesn't support anonymous union members

It does.  We use it in 'struct mbuf'.  It does require
-fms-extensions which we enable for kernel builds.  Perhaps ZFS is
missing this flag due to using custom build flags and/or rules?

-- 
John Baldwin