tex-start-options

tex-start-options is a variable defined in `tex-mode.el'.
Its value is

""

Documentation:
TeX options to use when starting TeX.
These immediately precede the commands in `tex-start-commands'
and the input file name, with no separating space and are not shell-quoted.
If nil, TeX runs with no options. See the documentation of `tex-command'.

You can customize this variable.

This variable was introduced, or its default value was changed, in version 22.1 of Emacs.