我正在尝试以批处理模式org-export-as-pdf组织文件（org版本＆gt; 8）。
$ emacs --batch --file test.org -f org-export-as-pdf-and-open
Loading 00debian-vars...
Loading /etc/emacs/site-start.d/50auctex.el (source)...
Loading /usr/share/emacs/site-lisp/auctex.el (source)...
Loading /usr/share/emacs/site-lisp/preview-latex.el (source)...
Loading /etc/emacs/site-start.d/50css-mode.el (source)...
Loading /etc/emacs/site-start.d/50dictionaries-common.el (source)...
Loading debian-ispell...
Loading /var/cache/dictionaries-common/emacsen-ispell-default.el (source)...
Loading /var/cache/dictionaries-common/emacsen-ispell-dicts.el (source)...
Loading /etc/emacs/site-start.d/50html-helper-mode.el (source)...
Loading /etc/emacs/site-start.d/50org-mode.el (source)...
Loading /etc/emacs/site-start.d/50pymacs.el (source)...
Loading /etc/emacs/site-start.d/50python-docutils.el (source)...
Loading /etc/emacs/site-start.d/50python-mode.el (source)...
OVERVIEW
Loading vc-hg...
Exporting to PDF...
Exporting to LaTeX...
Applying style hooks...
Applying style hooks... done
最后：
Symbol's value as variable is void: org-export-latex-packages-alist