
                 ############################################
                 Interface Code between Tinker and Tinker-GPU               
                 ############################################

      This directory contains scripts and code that generates interface
      information to allow the Tinker-GPU package to call routines from
      the Fortran-based Tinker CPU package.

      Procedure to generate the interface code:

      (1) Save the file below from the Tinker-GPU Github repository
          into the /interface directory under the name "export":

             https://raw.githubusercontent.com/TinkerTools \
                /tinker-gpu/master/ext/interface/export

      (2) Run the command "bash export update" to check if updates are
          available at the Tinker-GPU GitHub site. This command provides
          the files "export", "parse.py" and "version.txt", as well as
          an /include subdirectory.

      (3) Run the command "bash export c cpp". Once this finishes,
          it creates "CMakeLists.txt" and /c and /cpp subdirectories
          containing header files for the Tinker routines.

