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Date: Tue, 14 Feb 2017 23:18:03 +0800
From: Fam Zheng <famz@redhat.com>
Message-ID: <20170214151803.GD20715@lemon.lan>
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Subject: Re: [Qemu-devel] [PATCH v3 2/3] new: debian docker targets for
 cross-compiling
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To: Alex =?iso-8859-1?Q?Benn=E9e?= <alex.bennee@linaro.org>
Cc: Peter Maydell <peter.maydell@linaro.org>, QEMU Developers <qemu-devel@nongnu.org>

On Tue, 02/14 15:09, Alex Benn=E9e wrote:
>=20
> Peter Maydell <peter.maydell@linaro.org> writes:
>=20
> > On 14 February 2017 at 10:07, Alex Benn=E9e <alex.bennee@linaro.org> =
wrote:
> >> This provides a basic Debian install with access to the emdebian cro=
ss
> >> compilers. The debian-armhf-cross and debian-arm64-cross targets bui=
ld
> >> on the basic Debian image to allow cross compiling to those targets.
> >
> > Is there a particular reason for creating different docker images
> > for each cross target rather than just having one image with
> > all the cross compilers in it?
>=20
> Mainly the clashing of build-dependencies. Debian's multi-arch is prett=
y
> good but you still can't generally have two arches worth of complex
> dependencies installed at once.
>=20
> I did originally have one base docker image with all the compilers and
> intended to do the dependencies step as part of test-build. However whe=
n
> running as builders the docker images don't actually have network
> ability so couldn't download them.

Yes, having to "prepare", especially to download things, for each test
invocation is not resource friendly for CI too.

Fam