FROM wasi-sdk-builder-base

# Install an extra C++ toolchain which can target arm64 linux.
RUN apt-get install -y g++-aarch64-linux-gnu

# Configure Rust to use this new compiler for linking Rust executables.
ENV CARGO_TARGET_AARCH64_UNKNOWN_LINUX_GNU_LINKER aarch64-linux-gnu-gcc

# Note that `.github/workflows/main.yml` sets various bits and bobs of
# configuration and cmake flags that may get passed to the underlying build. For
# example LLVM is instructed to use the toolchain installed above.