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Date:      Wed, 16 Dec 2015 08:15:38 -0800
From:      John Baldwin <jhb@freebsd.org>
To:        "Jonathan T. Looney" <jtl@freebsd.org>
Cc:        Randall Stewart <rrs@netflix.com>, Ed Maste <emaste@freebsd.org>, "src-committers@freebsd.org" <src-committers@freebsd.org>, "svn-src-all@freebsd.org" <svn-src-all@freebsd.org>, "svn-src-head@freebsd.org" <svn-src-head@freebsd.org>
Subject:   Re: svn commit: r292309 - in head/sys: modules modules/tcp modules/tcp/fastpath netinet netinet/tcp_stacks
Message-ID:  <1627913.WATQQLTEnG@ralph.baldwin.cx>
In-Reply-To: <D296F3C9.4D82C%jlooney@juniper.net>
References:  <201512160056.tBG0ujqA067178@repo.freebsd.org> <1A3645F3-3287-4CD8-B69D-AC053507D435@netflix.com> <D296F3C9.4D82C%jlooney@juniper.net>

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On Wednesday, December 16, 2015 10:58:47 AM Jonathan T. Looney wrote:
> On Dec 16, 2015, at 10:08 AM, Randall Stewart <rrs@netflix.com> wrote:
> > Ahh I think I see this is a difference between our friend
> > clang and gcc.. since I bet ppc uses gcc not clang :-o
> 
> This sort of thing seems to happen often enough that it would be nice if
> there was an option to automatically build two kernels, one with each
> compiler. Is there already such an option?

make tinderbox effectively does that, but at a bit more expense.  amd64
doesn't build GCC 4.2 by default, so the simplest way is to build a kernel
for a non-clang platform, e.g.:

make TARGET=sparc64 kernel-toolchain
make TARGET=sparc64 buildkernel

(Note you only need to do the kernel-toolchain step once or after toolchain
changes like compiler upgrades.)

-- 
John Baldwin



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