Dockerfile

FROM ubuntu:22.04

RUN apt-get update && apt-get install -y --no-install-recommends \
    gcc \
    git ca-certificates \
    autoconf \
    make \
    patch

WORKDIR /root

COPY musl_system.patch /root

RUN git clone git://git.musl-libc.org/musl && \
    cd /root/musl && \
    git checkout 91e662d1d941215eb024787db5e910dbfb5b169f && \
    patch -p1 < /root/musl_system.patch && \
    mkdir build && \
    cd build && \
    ../configure --prefix=/root/install/musl && \
    make -j12 && make install /root/install/musl/bin/musl-gcc /root/install/musl/lib/musl-gcc.specs && \
    rm -rf /root/musl

WORKDIR /root/openssh

COPY . /root/openssh

RUN cd /root/openssh && \
    autoconf && \
    mkdir build && \
    cd build && \
    INSTALL=/root/openssh/install-sh LDFLAGS=-static CFLAGS="-D__ANDROID__ -O3 -fomit-frame-pointer -ffast-math" CC=/root/install/musl/bin/musl-gcc ../configure --prefix=/root/install/ --without-zlib --without-openssl && \
    make ssh sshd && \
    make install-ssh install-sshd