[PATCH 1/1] Dockerfile: compile QEMU for Nokia N900 emulation

[Tom Rini]

On Mon, Jul 13, 2020 at 07:10:46PM +0200, Heinrich Schuchardt wrote:

> For the Nokia N900 emulation we need a special QEMU version. Up to now we
> compile it in the Gitlab runner. By compiling it in Docker we can reduce
> the Gitlab job duration.
> 
> To avoid naming conflicts the QEMU binary is stored as
> /opt/qemu/bin/qemu-system-n900.
> 
> Signed-off-by: Heinrich Schuchardt <xypron.glpk at gmx.de>
> ---
>  Dockerfile | 10 ++++++++++
>  1 file changed, 10 insertions(+)
> 
> diff --git a/Dockerfile b/Dockerfile
> index 209e008..bc3cdee 100644
> --- a/Dockerfile
> +++ b/Dockerfile
> @@ -171,6 +171,16 @@ RUN git clone git://git.qemu.org/qemu.git /tmp/qemu && \
>  	make -j$(nproc) all install && \
>  	rm -rf /tmp/qemu
> 
> +# Compile QEMU for Nokia N900 emulation
> +# Last working commit is 8f8d8e0796efe1a6f34cdd83fb798f3c41217ec1
> +RUN git clone https://git.linaro.org/qemu/qemu-linaro.git /tmp/qemu && \
> +	cd /tmp/qemu && \
> +	git checkout 8f8d8e0796efe1a6f34cdd83fb798f3c41217ec1 && \
> +	./configure --enable-system --target-list=arm-softmmu --disable-sdl --disable-gtk --disable-curses --audio-drv-list= --audio-card-list= --disable-werror --disable-xen --disable-xen-pci-passthrough --disable-brlapi --disable-vnc --disable-curl --disable-slirp --disable-kvm --disable-user --disable-linux-user --disable-bsd-user --disable-guest-base --disable-uuid --disable-vde --disable-linux-aio --disable-cap-ng --disable-attr --disable-blobs --disable-docs --disable-spice --disable-libiscsi --disable-smartcard-nss --disable-usb-redir --disable-guest-agent --disable-seccomp --disable-glusterfs --disable-nptl --disable-fdt && \
> +	make -j$(nproc) && \
> +	cp arm-softmmu/qemu-system-arm /opt/qemu/bin/qemu-system-n900 && \
> +	rm -rf /tmp/qemu
> +
>  # Create our user/group
>  RUN echo uboot ALL=NOPASSWD: ALL > /etc/sudoers.d/uboot
>  RUN useradd -m -U uboot

Azure and GitLab will pick this up, if we modify the job to link the
binary in.  Travis will not, of course.  But this feels like a bit of a
micro-optimization.  The test job is 3-4 minutes currently.  If we want
to reduce that, I think switching the test script to use $(nproc) rather
than 4 for all make jobs would be a bit better.  Keeping all 3 CI
scripts as close as possible is a goal we have to have I believe to
reduce the likelyhood of one CI failing when another passes and it being
the CI at fault rather than exposing a race condition in our code.

-- 
Tom
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