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Date:   Thu, 21 Jun 2018 18:33:33 +0200
From:   Ingo Molnar <mingo@kernel.org>
To:     Matteo Croce <mcroce@redhat.com>
Cc:     "David S . Miller" <davem@davemloft.net>,
        alexei.starovoitov@gmail.com, sfr@canb.auug.org.au,
        torvalds@linux-foundation.org, akpm@linux-foundation.org,
        netdev <netdev@vger.kernel.org>, linux-kernel@vger.kernel.org,
        tglx@linutronix.de
Subject: Re: [GIT] Networking
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* Matteo Croce <mcroce@redhat.com> wrote:

> Hi Ingo,
> 
> are you compiling a 32 bit kernel on an x86_64 host?

Yes.

> then I tried to compile an i386 kernel on an x86_64 host and I get the
> same error:
> 
> $ make -j8 ARCH=i386
> ...
>   LD      vmlinux.o
> ld: i386:x86-64 architecture of input file
> `net/bpfilter/bpfilter_umh.o' is incompatible with i386 output

Correct.

> Any idea how to fix it without building it twice, for host and target?

No idea, sorry ...

Thanks,

	Ingo