FROM ubuntu:20.04
RUN apt-get update && apt-get install -y --no-install-recommends \
  gcc \
  ca-certificates \
  libc6-dev \
  gcc-arm-linux-gnueabihf \
  libc6-dev-armhf-cross \
  qemu-user
ENV CARGO_TARGET_ARMV7_UNKNOWN_LINUX_GNUEABIHF_LINKER=arm-linux-gnueabihf-gcc \
    CARGO_TARGET_ARMV7_UNKNOWN_LINUX_GNUEABIHF_RUNNER="qemu-arm -L /usr/arm-linux-gnueabihf"