erfpack takes files and creates erf out from them. If --module
is given it creates a erf which can be used as module, the default is
to generate normal erf. The output is written to the file specified
with --output option. If list of files is given then only those
files are added to the output file. If file list is omitted and
--dir is given then all files in the given directory are added to
erf.
All options given by the command line can also be given in the
configuration file. This option is used to read another configuration
file in addition to the default configuration file.
Set the output erf version to be given version. Version can either be
full version string (i.e. ``V1.1''), or floating point version (``1.1'')
or just the final number (i.e. ``1'').