build rust android lib with ndk-r18b (see also linker config: https://gist.github.com/extrawurst/3e0ad8bc967e70c0e04aefdec3172c45)

Dockerfile

FROM ubuntu

RUN apt-get update
RUN DEBIAN_FRONTEND="noninteractive" apt-get -y install tzdata
RUN apt-get install -yq sudo curl wget git file g++ cmake pkg-config \
                        libasound2-dev bison flex unzip ant openjdk-8-jdk \
                        lib32stdc++6 lib32z1 libssl-dev python \
                        g++-multilib gcc-multilib libc6-dev-i386 llvm-dev libclang-dev clang
RUN apt-get install -yq libncurses5 libncurses5-dev && \
    apt-get clean

ENV JAVA_HOME /usr/lib/jvm/java-8-openjdk-amd64

RUN curl https://sh.rustup.rs -sSf | sh -s -- --default-toolchain stable -y
ENV PATH /root/.cargo/bin:$PATH

RUN rustup target add \
    aarch64-linux-android \ 
    armv7-linux-androideabi \
    i686-linux-android

ENV ANDROID_HOME /usr/local/android-sdk-linux
RUN cd /usr/local && \
    wget -q https://dl.google.com/android/android-sdk_r24.4.1-linux.tgz && \
    tar -xzf android-sdk_r24.4.1-linux.tgz && \
    rm android-sdk_r24.4.1-linux.tgz
RUN echo y | ${ANDROID_HOME}/tools/android update sdk --no-ui --all --filter platform-tools,build-tools-29.0.3
ENV PATH $PATH:${ANDROID_HOME}/tools:$ANDROID_HOME/platform-tools

ENV ANDROID_SDK_ROOT /usr/local/android-ndk
ENV ANDROID_NDK_VERSION android-ndk-r18b

RUN cd /usr/local && \
    wget -q http://dl.google.com/android/repository/${ANDROID_NDK_VERSION}-linux-x86_64.zip && \
    unzip -q ${ANDROID_NDK_VERSION}-linux-x86_64.zip && \
    rm ${ANDROID_NDK_VERSION}-linux-x86_64.zip &&\
    mv /usr/local/${ANDROID_NDK_VERSION} ${ANDROID_SDK_ROOT}

# as soon as we go one api higher it wont work on Galaxy S4 (5.0.1) anymore with:
# **ERROR**: Can't open dynamic library: liblogic.so, error: dlopen failed: cannot locate symbol "__register_atfork" ..
RUN ${ANDROID_SDK_ROOT}/build/tools/make_standalone_toolchain.py --api 22 --arch arm64 --install-dir NDK/arm64 && \
    ${ANDROID_SDK_ROOT}/build/tools/make_standalone_toolchain.py --api 22 --arch x86 --install-dir NDK/x86 && \
    ${ANDROID_SDK_ROOT}/build/tools/make_standalone_toolchain.py --api 22 --arch arm --install-dir NDK/arm && \
    ${ANDROID_SDK_ROOT}/build/tools/make_standalone_toolchain.py --api 22 --arch x86_64 --install-dir NDK/x86_64