anchor.diff:    --enable-gpl \
     --enable-version3 \
     --enable-frei0r \
  +  --enable-ladspa \
     --enable-fontconfig \
     --enable-gray \
     --enable-iconv \
  
positive.code:   frei0r: env.FREI0R_VERSION, \
    ffmpeg: env.FFMPEG_VERSION, \
    fftw: env.FFTW_VERSION, \
    fontconfig: env.FONTCONFIG_VERSION, \
    libaom: env.AOM_VERSION, \
    libaribb24: env.LIBARIBB24_VERSION, \
  
negative.code:   EXPAT_VERSION=$(pkg-config --modversion expat) \
    FREI0R_VERSION=$(pkg-config --modversion frei0r) \
    FFTW_VERSION=$(pkg-config --modversion fftw3) \
    LADSPA_VERSION=$(apk info -a ladspa-dev | grep ladspa-dev | head -n1 | awk '{print $1}' | sed -e 's/ladspa-dev-//') \
    FONTCONFIG_VERSION=$(pkg-config --modversion fontconfig)  \
    FREETYPE_VERSION=$(pkg-config --modversion freetype2)  \
    FRIBIDI_VERSION=$(pkg-config --modversion fribidi)  \
  