anchor.diff:      soxr
       snappy
       speex
  -    speexdsp
       tesseract
       v4l_lib
       vid-stab
  
positive.code:     "--${boolEn (samba_client != null)}-libsmbclient"
      "--${boolEn (snappy != null)}-libsnappy"
      "--${boolEn (soxr != null)}-libsoxr"
      "--${boolEn (speex != null && speexdsp != null)}-libspeex"
      "--${boolEn (libssh != null)}-libssh"
      #(fflag "--${boolEn (tesseract != null)}-libtesseract" "3.0")
      /**/(fflag "--disable-libtesseract" "3.0")
  
negative.code: , snappy
  , soxr
  , speex
  , tesseract
  #, twolame
  #, utvideo
  