Re: [Qemu-devel] [PATCH v3 2/3] new: debian docker targets for cross-compiling

[Fam Zheng <famz@redhat.com>]

On Tue, 02/14 15:09, Alex Bennée wrote:
> 
> Peter Maydell <peter.maydell@linaro.org> writes:
> 
> > On 14 February 2017 at 10:07, Alex Bennée <alex.bennee@linaro.org> wrote:
> >> This provides a basic Debian install with access to the emdebian cross
> >> compilers. The debian-armhf-cross and debian-arm64-cross targets build
> >> 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?
> 
> Mainly the clashing of build-dependencies. Debian's multi-arch is pretty
> good but you still can't generally have two arches worth of complex
> dependencies installed at once.
> 
> 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 when
> 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