How do I cross compile for Ubuntu 22.04? (openssl3/libssl3)

[ShayBox]

When will cross update their images to use Ubuntu 22.04, GitHub has updated their ubuntu-latest action runner image to 22.04, the latest LTS release of Ubuntu.

I need to cross compile using OpenSSL v3 rather than v1 as most distros have switched now, and I need libcrypto which isn't provided by the openssl vendored crate.

This is my current cross config:

[package.metadata.cross.build]
pre-build = [
    "dpkg --add-architecture $CROSS_DEB_ARCH",
    "apt-get update && apt-get --assume-yes install libssl-dev:$CROSS_DEB_ARCH"
]

Which links to libcrypto.so.1.0.0 not libcrypto.so.3

[ShayBox]

This should probably be prioritized now that openssl3 is the dominant version of openssl #973
Ubuntu 20.04 has backported openssl3 but they do not provide openssl1 for 22.04 and above.

[yaleman]

Is there a way to custom build an image based on 22.04? 20.04's pretty old now. 😢

[Emilgardis]

yes, say you want to target aarch64-unknown-linux-gnu, you can make target.aarch64-unknown-linux-gnu.dockerfile point to a file Dockerfile.aarch64 that contains:

FROM ubuntu:22.04
ARG DEBIAN_FRONTEND=noninteractive

RUN apt-get update && apt-get install --assume-yes --no-install-recommends \
    g++-aarch64-linux-gnu \
    libc6-dev-arm64-cross \

ENV CROSS_TOOLCHAIN_PREFIX=aarch64-linux-gnu-
ENV CARGO_TARGET_AARCH64_UNKNOWN_LINUX_GNU_LINKER="$CROSS_TOOLCHAIN_PREFIX"gcc \
    AR_aarch64_unknown_linux_gnu="$CROSS_TOOLCHAIN_PREFIX"ar \
    CC_aarch64_unknown_linux_gnu="$CROSS_TOOLCHAIN_PREFIX"gcc \
    CXX_aarch64_unknown_linux_gnu="$CROSS_TOOLCHAIN_PREFIX"g++ \
    RUST_TEST_THREADS=1 \
    PKG_CONFIG_PATH="/usr/lib/aarch64-linux-gnu/pkgconfig/:${PKG_CONFIG_PATH}" \

[yaleman]

Looks like there's something broken with the ubuntu mirrors for arm64 :(

.261   404  Not Found [IP: 91.189.91.83 80]
6.270 Ign:14 http://archive.ubuntu.com/ubuntu jammy-updates/restricted arm64 Packages
6.534 Ign:15 http://archive.ubuntu.com/ubuntu jammy-updates/universe arm64 Packages
6.540 Ign:16 http://archive.ubuntu.com/ubuntu jammy-updates/main arm64 Packages
6.542 Err:17 http://archive.ubuntu.com/ubuntu jammy-backports/main arm64 Packages
6.542   404  Not Found [IP: 91.189.91.83 80]
6.548 Ign:18 http://archive.ubuntu.com/ubuntu jammy-backports/universe arm64 Packages
6.599 Reading package lists...
7.176 E: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/jammy/restricted/binary-arm64/Packages  404  Not Found [IP: 91.189.91.83 80]
7.176 E: Failed to fetch http://security.ubuntu.com/ubuntu/dists/jammy-security/multiverse/binary-arm64/Packages  404  Not Found [IP: 91.189.91.81 80]
7.176 E: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/jammy-updates/multiverse/binary-arm64/Packages  404  Not Found [IP: 91.189.91.83 80]
7.176 E: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/jammy-backports/main/binary-arm64/Packages  404  Not Found [IP: 91.189.91.83 80]
7.176 E: Some index files failed to download. They have been ignored, or old ones used instead.

[Emilgardis]

Ah yes, they've messed up the sources a bit, you need to add [arch=amd64] in front of the normal archive and security repos in sources.list, ill create a working version for you when im off work

See for example this so post

[Emilgardis]

Actually, you could use #751 (comment) as inspiration, you need to do a similar thing, do note that that script/pre-build assumes that the host is aarch64

[yaleman]

This worked for me, thanks! I had to specify the au.archive because base archive didn't have the required ports?

Cross.toml

[build.env]

[target.aarch64-unknown-linux-gnu]
dockerfile = "platform/crossbuild/ubuntu-22.04/Dockerfile"
pre-build = [
    "TZ=UTC ln -snf /usr/share/zoneinfo/$TZ /etc/localtime && echo $TZ > /etc/timezone",

    "apt-get update && apt-get install --assume-yes rsync libssl-dev build-essential",

    "sed 's/^deb http/deb [arch=amd64] http/' -i '/etc/apt/sources.list'",
    "echo 'deb [arch=arm64] http://au.archive.ubuntu.com/pub/ubuntu/ports jammy main restricted universe multiverse' >> /etc/apt/sources.list",
    "echo 'deb [arch=arm64] http://au.archive.ubuntu.com/pub/ubuntu/ports jammy-updates main restricted universe multiverse' >> /etc/apt/sources.list",
    "echo 'deb [arch=arm64] http://au.archive.ubuntu.com/pub/ubuntu/ports jammy-backports main restricted universe multiverse' >> /etc/apt/sources.list",

    "dpkg --add-architecture $CROSS_DEB_ARCH",
    "apt-get update && apt-get install --assume-yes libssl-dev:$CROSS_DEB_ARCH  libpam0g-dev:$CROSS_DEB_ARCH libudev-dev:$CROSS_DEB_ARCH pkg-config:$CROSS_DEB_ARCH",
]

Dockerfile

FROM ubuntu:22.04
ARG DEBIAN_FRONTEND=noninteractive

RUN apt-get update && apt-get install --assume-yes --no-install-recommends \
    g++-aarch64-linux-gnu \
    libc6-dev-arm64-cross

ENV CROSS_TOOLCHAIN_PREFIX=aarch64-linux-gnu-
ENV CARGO_TARGET_AARCH64_UNKNOWN_LINUX_GNU_LINKER="$CROSS_TOOLCHAIN_PREFIX"gcc \
    AR_aarch64_unknown_linux_gnu="$CROSS_TOOLCHAIN_PREFIX"ar \
    CC_aarch64_unknown_linux_gnu="$CROSS_TOOLCHAIN_PREFIX"gcc \
    CXX_aarch64_unknown_linux_gnu="$CROSS_TOOLCHAIN_PREFIX"g++ \
    RUST_TEST_THREADS=1 \
    PKG_CONFIG_PATH="/usr/lib/aarch64-linux-gnu/pkgconfig/:${PKG_CONFIG_PATH}"