Dockerfile for compiling z/OS GCC cross compiler

Dockerfile

# https://blog.the-leviathan.ch/?p=1344
FROM ubuntu:18.04

RUN apt-get -y update && \
       apt-get install -y git build-essential flex bison texinfo rsync

RUN git clone -b v5.3.12 https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git

RUN cd linux && \
	make ARCH=s390 config && \
	make ARCH=s390 \
		INSTALL_HDR_PATH=/opt/IBM/s390x-ibm-zos-gnu \
		headers_install

RUN git clone -b lev/master https://github.com/leviathanch/binutils.git

RUN cd binutils && \
	git checkout lev/master && \
	mkdir -p build && cd build && \
	CFLAGS="-Wno-error" ../configure --prefix=/opt/IBM \
		--program-prefix=s390x-ibm-zos-gnu- \
		--target=s390x-ibm-zos-gnu && \
	make -j12 && make install

RUN git clone -b lev/master https://github.com/leviathanch/gcc.git

RUN apt-get install -y libgmp-dev libmpfr-dev libmpc-dev

RUN cd gcc && \
	mkdir -p build && cd build && \
	CFLAGS="-Wno-error" ../configure \
		--prefix=/opt/IBM \
		--program-prefix=s390x-ibm-zos-gnu- \
		--target=s390x-ibm-zos-gnu \
		--disable-multilib \
		--enable-languages=c,c++ \
		--disable-shared \
		--disable-checking \
		--enable-lock-elision=yes && \
	make -j12 all-gcc && make install-gcc

RUN git clone -b lev/master https://github.com/leviathanch/glibc.git

RUN apt-get install -y gawk python

RUN cd glibc && \
	mkdir -p build && cd build && \
	TARGET_CC=s390x-ibm-zos-gnu-gcc CFLAGS="-Wno-error -I/opt/IBM/include -L/opt/IBM/lib64/gcc/s390x-ibm-zos-gnu/8.3.1 -I/opt/IBM/lib64/gcc/s390x-ibm-zos-gnu/8.3.1/include -static -fsplit-stack -O3 -fexec-charset=IBM-1047" \
		../configure \
			--prefix=/opt/IBM/s390x-ibm-zos-gnu \
			--host=s390x-ibm-zos-gnu \
			--target=s390x-ibm-zos-gnu \
			--build=s390x-ibm-zos-gnu \
			--disable-multilib \
			--with-headers=/opt/IBM/s390x-ibm-zos-gnu/include \
			--disable-shared \
			--disable-nscd && \
	make install-bootstrap-headers=yes install-headers && \
	make -j12 csu/subdir_lib && \
	install csu/*.o /opt/IBM/s390x-ibm-zos-gnu/lib/ && \
	touch /opt/IBM/s390x-ibm-zos-gnu/include/gnu/stubs.h && \
	s390x-ibm-zos-gnu-gcc && \
		-nostdlib && \
		-nostartfiles && \
		-shared && \
		-x c /dev/null && \
		-o /opt/IBM/s390x-ibm-zos-gnu/lib/libc.so

RUN cd gcc/build && \
	make -j12 all-target-libgcc && \
	make install-target-libgcc

RUN cd glibc/build && \
	make -j12 && \
	make install