1FROM ubuntu:20.04
2
3# Disable interactive prompts on package installation
4ENV DEBIAN_FRONTEND noninteractive
5
6# Dependencies to get the git sources and go binaries
7RUN apt-get update && apt-get install -y  --no-install-recommends \
8        ca-certificates \
9        curl \
10        git \
11        rsync \
12    && apt-get clean \
13    && rm -rf /var/lib/apt/lists/*
14
15# Get the git sources. If not cached, this takes O(5 minutes).
16WORKDIR /git
17RUN git config --global advice.detachedHead false
18# Linux Kernel: Released 29 Aug 2021
19RUN git clone --branch v5.14 --depth 1 https://kernel.googlesource.com/pub/scm/linux/kernel/git/torvalds/linux
20# GNU C library: Released 02 Aug 2021
21RUN git clone --branch release/2.34/master --depth 1 https://sourceware.org/git/glibc.git
22
23# Get Go
24ENV GOLANG_VERSION 1.17
25ENV GOLANG_DOWNLOAD_URL https://golang.org/dl/go$GOLANG_VERSION.linux-amd64.tar.gz
26ENV GOLANG_DOWNLOAD_SHA256 6bf89fc4f5ad763871cf7eac80a2d594492de7a818303283f1366a7f6a30372d
27
28RUN curl -fsSL "$GOLANG_DOWNLOAD_URL" -o golang.tar.gz \
29    && echo "$GOLANG_DOWNLOAD_SHA256  golang.tar.gz" | sha256sum -c - \
30    && tar -C /usr/local -xzf golang.tar.gz \
31    && rm golang.tar.gz
32
33ENV PATH /usr/local/go/bin:$PATH
34
35# Linux and Glibc build dependencies and emulator
36RUN apt-get update && apt-get install -y  --no-install-recommends \
37        bison gawk make python3 \
38        gcc gcc-multilib \
39        gettext texinfo \
40        qemu-user \
41    && apt-get clean \
42    && rm -rf /var/lib/apt/lists/*
43# Cross compilers (install recommended packages to get cross libc-dev)
44RUN apt-get update && apt-get install -y \
45        gcc-aarch64-linux-gnu       gcc-arm-linux-gnueabi     \
46        gcc-mips-linux-gnu          gcc-mips64-linux-gnuabi64 \
47        gcc-mips64el-linux-gnuabi64 gcc-mipsel-linux-gnu      \
48        gcc-powerpc-linux-gnu       gcc-powerpc64-linux-gnu   \
49        gcc-powerpc64le-linux-gnu   gcc-riscv64-linux-gnu     \
50        gcc-s390x-linux-gnu         gcc-sparc64-linux-gnu     \
51    && apt-get clean \
52    && rm -rf /var/lib/apt/lists/*
53
54# Let the scripts know they are in the docker environment
55ENV GOLANG_SYS_BUILD docker
56WORKDIR /build
57ENTRYPOINT ["go", "run", "linux/mkall.go", "/git/linux", "/git/glibc"]
58