FROM debian:jessie-slim as builder ARG ARCH=x86_64 ARG DEBIAN_FRONTEND=noninteractive ARG GLIBC_VER=2.25 ARG BUSYB_VER=1.26.2 ARG SU_EXEC_VER=v0.2 ARG TINI_VER=v0.14.0 WORKDIR /output #Set up our dependencies, configure the output filesystem a bit RUN apt-get update -qy && \ apt-get install -qy curl build-essential gawk linux-libc-dev && \ mkdir -p usr/bin usr/sbin usr/lib dev proc root etc && \ ln -sv usr/bin bin && \ ln -sv usr/sbin sbin && \ ln -sv usr/lib lib && \ ln -sv usr/lib lib64 # Pull busybox and some other utilities RUN curl -L https://busybox.net/downloads/binaries/$BUSYB_VER-defconfig-multiarch/busybox-$ARCH > bin/busybox && \ curl -L https://github.com/javabean/su-exec/releases/download/${SU_EXEC_VER}/su-exec.amd64 > sbin/su-exec && \ curl -L https://github.com/krallin/tini/releases/download/${TINI_VER}/tini-amd64 > sbin/tini && \ chmod +x bin/busybox sbin/su-exec sbin/tini WORKDIR /tmp ARG CFLAGS="-Os -pipe -fstack-protector-strong" ARG LDFLAGS="-Wl,-O1,--sort-common -Wl,-s" # Download and build glibc from source RUN curl -L https://ftp.gnu.org/gnu/glibc/glibc-$GLIBC_VER.tar.xz | tar xJ && \ mkdir -p glibc-build && cd glibc-build && \ \ echo "slibdir=/lib" >> configparms && \ echo "rtlddir=/lib" >> configparms && \ echo "sbindir=/bin" >> configparms && \ echo "rootsbindir=/bin" >> configparms && \ \ rm -rf /usr/include/x86_64-linux-gnu/c++ && \ ln -sfv /usr/include/x86_64-linux-gnu/* /usr/include && \ ../glibc-$GLIBC_VER/configure \ --prefix="$(pwd)/root" \ --libdir="$(pwd)/root/lib" \ --libexecdir=/lib \ --with-headers=/usr/include \ --enable-add-ons \ --enable-obsolete-rpc \ --enable-kernel=3.10.0 \ --enable-bind-now \ --disable-profile \ --enable-stackguard-randomization \ --enable-stack-protector=strong \ --enable-lock-elision \ --enable-multi-arch \ --disable-werror && \ make && make install_root=$(pwd)/out install # Copy glibc libs & generate ld cache RUN cp -r glibc-build/out/lib/*.so /output/lib && \ echo '/usr/lib' > /output/etc/ld.so.conf && \ ldconfig -r /output # Build and install openssl ARG DESTDIR=/output/libressl RUN curl -L https://www.openssl.org/source/openssl-1.1.0e.tar.gz | \ tar xz -C /tmp --strip-components=1 && \ ./config --prefix=/output && \ make install_sw && \ rm /output/lib/*.a && \ rm -r /output/include # ============= FROM scratch WORKDIR / COPY --from=builder /output/ / # Needed cos we dont have /bin/sh yet RUN ["/bin/busybox", "--install", "-s", "/bin"] CMD ["sh"]