Dockerfile.toolchain

# syntax=docker/dockerfile:1
ARG TARGET=x86_64-unknown-linux-musl

# https://hub.docker.com/_/ubuntu
FROM docker.io/library/ubuntu:22.04 AS build

SHELL ["/bin/bash", "-o", "pipefail", "-c"]

WORKDIR /

ENV DEBIAN_FRONTEND=noninteractive \
    LANG=C.UTF-8 \
    TZ=UTC \
    TERM=xterm-256color

# Used for testing the GitHub workflow
# RUN echo "Building musl toolchain for target ${TARGET}"

# Make sure we have basic dev tools for building.
# We only build the gcc musl based toolchain here
# and use these compiled files later in other Docker builds.
# This saves time during the building of the actual libraries
# we want to build since the toolchain doesn't change that much anyway.
#
# hadolint ignore=DL3008
RUN apt-get update && \
    apt-get install -y \
        build-essential \
        gcc g++ cpp \
        cmake \
        libtool \
        pkg-config \
        curl \
        file \
        rsync \
        texinfo \
        ca-certificates \
        --no-install-recommends \
        && \
    # Cleanup apt
    apt-get autoremove -y --purge && \
    apt-get clean -y && \
    rm -rf /var/cache/* /var/lib/apt/lists/* && \
    # Default cleanups
    find /var/log -type f -delete && \
    # Pre-Create the /musl-cross-make directory
    mkdir -pv /musl-cross-make

ARG TARGET
ARG MUSL_CROSS_MAKE_HASH=fd6be58297ee21fcba89216ccd0d4aca1e3f1c5c
ARG ARCH_COMMON_CONFIG=""

COPY config.mak /musl-cross-make/config.mak
# hadolint ignore=DL3003
RUN echo "Downloading musl-cross-make" && \
    # Download musl-cross-make from https://github.com/richfelker/musl-cross-make based upon the provided $MUSL_CROSS_MAKE_HASH
    curl -w"%{stderr}URL: %{url_effective}\nTime: %{time_total}\nSize: %{size_download}\n" --retry 3 \
      -sSL "https://github.com/richfelker/musl-cross-make/archive/${MUSL_CROSS_MAKE_HASH}.tar.gz" | \
      tar xzf - --strip-components=1 -C /musl-cross-make/ && \
    mkdir -p /usr/local/musl && \
    #
    echo "Building musl toolchain for target ${TARGET}" && \
    cd /musl-cross-make && \
    # Build the actual toolchain here
    # We store the toolchain in /usr/local/musl
    make install "-j$(nproc)" > /dev/null && \
    # Fix symlink to libc.so
    ln -sfrn "/usr/local/musl/${TARGET}/lib/libc.so" "$(ls -1 /usr/local/musl/${TARGET}/lib/ld-*.so.1)" && \
    # Cleanup
    cd / && \
    rm -rf /musl-cross-make && \
    echo "Finished building target ${TARGET}"

# https://hub.docker.com/_/busybox
FROM docker.io/busybox:1.36.1-glibc

WORKDIR /

COPY --from=build /usr/local/musl /usr/local/musl
ENV PATH="${PATH}:/usr/local/musl/bin"
ARG TARGET

LABEL maintainer="BlackDex <black.dex@gmail.com>"
LABEL org.opencontainers.image.create="$(date --utc --iso-8601=seconds)"
LABEL org.opencontainers.image.documentation="https://github.com/BlackDex/rust-musl/"
LABEL org.opencontainers.image.licenses="Apache License 2.0"
LABEL org.opencontainers.image.url="https://github.com/BlackDex/rust-musl/"
LABEL org.opencontainers.image.description="MUSL Cross Build Toolchain for ${TARGET}"