Dockerfile.toolchain

FROM ubuntu:20.04 AS llvm-builder
MAINTAINER rickytaylor26@gmail.com
MAINTAINER rein@vantveer.me
ENV DEBIAN_FRONTEND=noninteractive

RUN apt-get update \
    && apt-get install -y --no-install-recommends \
        git \
        curl \
        ca-certificates \
        build-essential \
        cmake \
        python3 \
        lld \
        ninja-build \
        pkg-config \
        libssl-dev \
    && rm -rf /var/lib/apt/lists/*

RUN git clone -b llvm-12 --progress --single-branch https://github.com/ricky26/llvm-project /llvm-project

# Lowering the number of jobs may help you solve out of memory crashes
# Increasing the number of jobs will save you time :)
ARG NUM_JOBS=6
WORKDIR /llvm-m68k
RUN cmake /llvm-m68k \
    -S /llvm-project/llvm \
    -G Ninja \
    "-DLLVM_USE_LINKER=lld" \
    "-DCMAKE_BUILD_TYPE=Release" \
    "-DLLVM_ENABLE_ASSERTIONS=ON" \
    "-DLLVM_PARALLEL_LINK_JOBS=1" \
    "-DLLVM_TARGETS_TO_BUILD=X86" \
    "-DLLVM_EXPERIMENTAL_TARGETS_TO_BUILD=M68k" \
    "-DLLVM_ENABLE_PROJECTS=clang;lld" \
    && cmake --build . --parallel ${NUM_JOBS} --target install \
    && rm -rf /llvm-project

WORKDIR /rust-m68k
RUN git clone -b m68k-linux --single-branch https://github.com/ricky26/rust.git /rust-m68k
RUN cp config.toml.example config.toml

# Create a m68k-unknown-linux-gnu target
ARG TARGETS='"x86_64-unknown-linux-gnu", "m68k-unknown-linux-gnu"'
RUN sed -i "s|#target = \[\"x86_64-unknown-linux-gnu\"\]|target = \[${TARGETS}\]|g" config.toml
# Validate that the target was set
RUN grep "target = \[${TARGETS}\]" config.toml

# Set the llvm-config path to the custom-built m68k llvm
RUN sed -i 's|#llvm-config = "../path/to/llvm/root/bin/llvm-config"|llvm-config = "/llvm-m68k/bin/llvm-config"|g' config.toml
RUN grep 'llvm-config = "/llvm-m68k/bin/llvm-config"' config.toml

# Compile rustc and cargo
RUN python3 x.py build --stage=2 rustc cargo

# Install rustup to link a "m68k" toolchain to the custom-built rustc compiler
RUN curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | \
    sh -s -- \
        -y \
        --profile minimal \
        --default-toolchain none
# Add path to m68k-built cargo and rustc
ENV PATH=$PATH:/rust-m68k/build/x86_64-unknown-linux-gnu/stage2/bin
ENV PATH=$PATH:/rust-m68k/build/x86_64-unknown-linux-gnu/stage2-tools/x86_64-unknown-linux-gnu/release
# Bind m68k rust toolchain using rustup
RUN $HOME/.cargo/bin/rustup toolchain link m68k "/rust-m68k/build/x86_64-unknown-linux-gnu/stage2"
# Debug: show list of supported architecture targets
RUN rustc --print target-list | grep m68k