README: add libffi-dev

2016-03-22 23:39:02 -07:00
parent a73afc4e76
commit 1605408c23
1 changed files with 1 additions and 0 deletions
@@ -154,6 +154,7 @@ Install system dependencies::
   sudo apt-get install \
      zlib1g-dev \
      libjpeg-dev \
+      libffi-dev \
      ghostscript \
      tesseract-ocr \
      qpdf \