auctex: Automatic Global

 
 5.5.1 Automatic Customization for the Site
 ------------------------------------------
 
 Assuming that the automatic customization at the global level was done
 when AUCTeX was installed, your choice is now: will you use it?  If you
 use it, you will benefit by having access to all the symbols and
 environments available for completion purposes.  The drawback is slower
 load time when you edit a new file and perhaps too many confusing
 symbols when you try to do a completion.
 
    You can disable the automatic generated global style hooks by setting
 the variable 'TeX-auto-global' to nil.
 
  -- User Option: TeX-macro-global
      Directories containing the site's TeX style files.
 
  -- User Option: TeX-style-global
      Directory containing hand generated TeX information.
 
      These correspond to TeX macros shared by all users of a site.
 
  -- User Option: TeX-auto-global
      Directory containing automatically generated information.
 
      For storing automatic extracted information about the TeX macros
      shared by all users of a site.