# explicitly use Debian for maximum cross-architecture compatibility
FROM debian:stretch-slim

#RUN dpkg --add-architecture i386

RUN apt-get update && apt-get install -y --no-install-recommends \
		gcc \
		libc6-dev \
		make \
#		\
#		gcc-multilib \
#		libc6-dev-i386 \
#		linux-libc-dev:i386 \
		\
		libc6-dev-arm64-cross \
		libc6-dev-armel-cross \
		libc6-dev-armhf-cross \
		libc6-dev-ppc64el-cross \
		libc6-dev-s390x-cross \
		\
		gcc-aarch64-linux-gnu \
		gcc-arm-linux-gnueabi \
		gcc-arm-linux-gnueabihf \
		gcc-powerpc64le-linux-gnu \
		gcc-s390x-linux-gnu \
	&& rm -rf /var/lib/apt/lists/*

WORKDIR /usr/src/hello
COPY . .

RUN set -ex; \
	make clean all test \
		TARGET_ARCH='amd64' \
		CC='x86_64-linux-gnu-gcc' \
		STRIP='x86_64-linux-gnu-strip'

RUN set -ex; \
	make clean all \
		TARGET_ARCH='arm32v5' \
		CC='arm-linux-gnueabi-gcc' \
		STRIP='arm-linux-gnueabi-strip'

RUN set -ex; \
	make clean all \
		TARGET_ARCH='arm32v7' \
		CC='arm-linux-gnueabihf-gcc' \
		STRIP='arm-linux-gnueabihf-strip'

RUN set -ex; \
	make clean all \
		TARGET_ARCH='arm64v8' \
		CC='aarch64-linux-gnu-gcc' \
		STRIP='aarch64-linux-gnu-strip'

# TODO TARGET_ARCH='i386' (heinous package conflicts trying to get "gcc -m32"/"gcc-multilib" to work with all the cross-compiling gccs)

RUN set -ex; \
	make clean all \
		TARGET_ARCH='ppc64le' \
		CC='powerpc64le-linux-gnu-gcc' \
		STRIP='powerpc64le-linux-gnu-strip'

RUN set -ex; \
	make clean all \
		TARGET_ARCH='s390x' \
		CC='s390x-linux-gnu-gcc' \
		STRIP='s390x-linux-gnu-strip'

RUN find \( -name 'hello' -or -name 'hello.txt' \) -exec ls -lh '{}' +

CMD ["./hello-world/hello"]