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Date:	Thu, 22 May 2014 10:58:49 -0700
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Alexei Starovoitov <ast@...mgrid.com>
Cc:	"David S. Miller" <davem@...emloft.net>,
	Network Development <netdev@...r.kernel.org>,
	Daniel Borkmann <dborkman@...hat.com>
Subject: Re: [patch 1/1] lib/test_bpf.c: don't use gcc union shortcut

On Thu, 22 May 2014 10:36:40 -0700 Alexei Starovoitov <ast@...mgrid.com> wrote:

> On Thu, May 22, 2014 at 10:16 AM,  <akpm@...ux-foundation.org> wrote:
> > From: Andrew Morton <akpm@...ux-foundation.org>
> > Subject: lib/test_bpf.c: don't use gcc union shortcut
> >
> > Older gcc's (mine is gcc-4.4.4) make a mess of this.
> >
> > lib/test_bpf.c:74: error: unknown field 'insns' specified in initializer
> > lib/test_bpf.c:75: warning: missing braces around initializer
> > lib/test_bpf.c:75: warning: (near initialization for 'tests[0].<anonymous>.insns[0]')
> > lib/test_bpf.c:76: error: extra brace group at end of initializer
> > lib/test_bpf.c:76: error: (near initialization for 'tests[0].<anonymous>')
> > lib/test_bpf.c:76: warning: excess elements in union initializer
> > lib/test_bpf.c:76: warning: (near initialization for 'tests[0].<anonymous>')
> > lib/test_bpf.c:77: error: extra brace group at end of initializer
> >
> > Cc: Alexei Starovoitov <ast@...mgrid.com>
> > Cc: David S. Miller <davem@...emloft.net>
> > Signed-off-by: Andrew Morton <akpm@...ux-foundation.org>
> 
> I didn't know we still want to support such old versions.
> gcc 4.4 was released in 2009.

Well, gcc-4.4 fails but I don't know about later versions.

> What is the official cutoff for gcc ?

We're really slack about tracking this.  Documentation/Changes says gcc-3.2!

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