FROM ubuntu:20.04 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}"