Unable to add packages for other architectures #149
Description
The documentation states that it's possible to create derivative images that include additional packages required for building. For example, libasound2-dev is required to build the asound-dev package. README.md states that it is possible to do this:
FROM japaric/aarch64-unknown-linux-gnu:v0.1.4
RUN dpkg --add-architecture arm64 && \
apt-get update && \
apt-get install libfoo:arm64
However this doesn't actually work, because the distribution that is in use doesn't support other architectures:
xobs@nas /d/x/d/cross-build> docker run --rm -it japaric/aarch64-unknown-linux-gnu:v0.1.4 bash
root@a2a1fcfefc05:/# dpkg --add-architecture arm64 && \
> apt-get update
Ign http://archive.ubuntu.com trusty InRelease
Get:1 http://archive.ubuntu.com trusty-updates InRelease [65.9 kB]
...
Err http://archive.ubuntu.com trusty-updates/restricted arm64 Packages
404 Not Found [IP: 91.189.88.149 80]
Err http://archive.ubuntu.com trusty-updates/universe arm64 Packages
404 Not Found [IP: 91.189.88.149 80]
...
W: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/trusty/restricted/binary-arm64/Packages 404 Not Found [IP: 91.189.88.149 80]
W: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/trusty/universe/binary-arm64/Packages 404 Not Found [IP: 91.189.88.149 80]
E: Some index files failed to download. They have been ignored, or old ones used instead.
root@a2a1fcfefc05:/#