anchor.diff:  #
   ##############################
   FROM alpine:3.9.2 as builder
  -# bump: libfdk-aac /FDK_AAC_VERSION=([\d.]+)/ https://github.com/mstorsjo/fdk-aac.git|*
  +
   ARG FDK_AAC_VERSION=2.0.1
   ARG FDK_AAC_URL="https://github.com/mstorsjo/fdk-aac/archive/v$FDK_AAC_VERSION.tar.gz"
   ARG FDK_AAC_SHA256=a4142815d8d52d0e798212a5adea54ecf42bcd4eec8092b37a8cb615ace91dc6
   
   RUN echo "---- INSTALL BUILD DEPENDENCIES ----" \
  -    && echo http://dl-cdn.alpinelinux.org/alpine/edge/testing >> /etc/apk/repositories \
       && apk add --no-cache --update --upgrade --virtual=build-dependencies \
       autoconf \
       libtool \
  
positive.code: 
  
  # copy ffmpeg static with libfdk from mwader docker image
  COPY --from=mwader/static-ffmpeg:4.1.3-1 /ffmpeg /usr/local/bin/
  
  # copy compiled mp4v2 binaries, libs and fdkaac encoder to runtime image
  COPY --from=builder /usr/local/bin/mp4* /usr/local/bin/fdkaac /usr/local/bin/
  COPY --from=builder /usr/local/lib/libmp4v2* /usr/local/lib/
  
  
  
  WORKDIR ${WORKDIR}
  # CMD ["list"]
  ENTRYPOINT ["/bin/ash"]
  
negative.code:     && wget https://github.com/nu774/fdkaac/archive/1.0.0.tar.gz \
      && tar xzf 1.0.0.tar.gz \
      && cd fdkaac-1.0.0 \
      && autoreconf -i && ./configure --enable-static --disable-shared && make -j4 && make install && rm -rf /tmp/* \
  && echo "---- REMOVE BUILD DEPENDENCIES (to keep image small) ----" \
      && apk del --purge build-dependencies && rm -rf /tmp/*
  
  