add riscv64 support

[gdams]

Ubuntu has now added official images for Oracular (24.10) so I've added this for now

[gdams]

I cannot recreate the error locally when building like this:

docker buildx build --platform linux/riscv64 -t foo .

docker run  --platform linux/riscv64 foo java -version
openjdk version "21.0.2" 2024-01-16 LTS
OpenJDK Runtime Environment Temurin-21.0.2+13 (build 21.0.2+13-LTS)
OpenJDK 64-Bit Server VM Temurin-21.0.2+13 (build 21.0.2+13-LTS, mixed mode, sharing)

CC @tianon @yosifkit as they may have some extra insight here

> [2/5] RUN set -eux;     apt-get update;     DEBIAN_FRONTEND=noninteractive apt-get install -y --no-install-recommends         wget         fontconfig         ca-certificates p11-kit         binutils         tzdata         locales     ;     echo "en_US.UTF-8 UTF-8" >> /etc/locale.gen;     locale-gen en_US.UTF-8;     rm -rf /var/lib/apt/lists/*:
0.156 exec /bin/sh: exec format error
------
Dockerfile:28
--------------------
  27 |     
  28 | >>> RUN set -eux; \
  29 | >>>     apt-get update; \
  30 | >>>     DEBIAN_FRONTEND=noninteractive apt-get install -y --no-install-recommends \
  31 | >>>         wget \
  32 | >>>         # java.lang.UnsatisfiedLinkError: libfontmanager.so: libfreetype.so.6: cannot open shared object file: No such file or directory
  33 | >>>         # java.lang.NoClassDefFoundError: Could not initialize class sun.awt.X11FontManager
  34 | >>>         # https://github.com/docker-library/openjdk/pull/235#issuecomment-4244[66](https://github.com/adoptium/containers/actions/runs/8278932317/job/22652358248?pr=509#step:5:67)077
  35 | >>>         fontconfig \
  36 | >>>         # utilities for keeping Ubuntu and OpenJDK CA certificates in sync
  37 | >>>         # https://github.com/adoptium/containers/issues/293
  38 | >>>         ca-certificates p11-kit \
  39 | >>>         # jlink --strip-debug on 13+ needs objcopy: https://github.com/docker-library/openjdk/issues/351
  40 | >>>         # Error: java.io.IOException: Cannot run program "objcopy": error=2, No such file or directory
  41 | >>>         binutils \
  42 | >>>         tzdata \
  43 | >>>         # locales ensures proper character encoding and locale-specific behaviors using en_US.UTF-8
  44 | >>>         locales \
  45 | >>>     ; \
  46 | >>>     echo "en_US.UTF-8 UTF-8" >> /etc/locale.gen; \
  47 | >>>     locale-gen en_US.UTF-8; \
  48 | >>>     rm -rf /var/lib/apt/lists/*
  49 |     
--------------------
ERROR: failed to solve: process "/bin/sh -c set -eux;     apt-get update;     DEBIAN_FRONTEND=noninteractive apt-get install -y --no-install-recommends         wget         fontconfig         ca-certificates p11-kit         binutils         tzdata         locales     ;     echo \"en_US.UTF-8 UTF-8\" >> /etc/locale.gen;     locale-gen en_US.UTF-8;     rm -rf /var/lib/apt/lists/*" did not complete successfully: exit code: 1
Error: Process completed with exit code 1.

[sxa]

I cannot recreate the error locally when building like this:

For what it's worth when I tried running on an Ubuntu 23.04 host (native riscv64) I had an issue with the repositories for sid:

$ docker run -it debian:sid-slim
root@a166693ac07f:/# apt-get -y update
Get:1 http://deb.debian.org/debian-ports sid InRelease [80.4 kB]
Get:2 http://deb.debian.org/debian-ports unreleased InRelease [54.1 kB]
Fetched 134 kB in 1s (122 kB/s)
Reading package lists... Done
N: Skipping acquire of configured file 'main/binary-riscv64/Packages' as repository 'http://deb.debian.org/debian-ports sid InRelease' doesn't support architecture 'riscv64'
N: Skipping acquire of configured file 'main/binary-riscv64/Packages' as repository 'http://deb.debian.org/debian-ports unreleased InRelease' doesn't support architecture 'riscv64'

[yosifkit]

0.156 exec /bin/sh: exec format error

I think this error is because GitHub actions runners aren't automatically setup with user-mode qemu like when using Docker Desktop.

As far as adding Debian Unstable based builds, we wouldn't do it in images we directly maintain since it is actually unstable (https://wiki.debian.org/DebianUnstable)

having images based on Debian Unstable leads to a lot of not-unexpected instability both in our own builds and in the downstream builds of our users - https://github.com/docker-library/golang/issues/435#issuecomment-1648671784

[gdams]

0.156 exec /bin/sh: exec format error

I think this error is because GitHub actions runners aren't automatically setup with user-mode qemu like when using Docker Desktop.

As far as adding Debian Unstable based builds, we wouldn't do it in images we directly maintain since it is actually unstable (https://wiki.debian.org/DebianUnstable)

having images based on Debian Unstable leads to a lot of not-unexpected instability both in our own builds and in the downstream builds of our users

• docker-library/golang#435 (comment)

Right okay, I'll see if I can implement some changes to set. the user-mode qemu when running non intel builds.

As for the base image, it sounds like we're stuck until Ubuntu add support to their official images again. Do you know who I can reach out to resolve this?