usage_message("
lpdoc -help        

  Print this help message.

xsbdoc [MiscOpts] [-p start_page ] 
	[-t paper_type ] 
        -main <main> [ <f1.texic> ... <fN.texic> ] 

  Generate    the main    .texic   file  for  main
  application  file   <file> and   whose component
  .texic files are <file1.texic>... <fileN.texic>.
  The special index name 'all' results in all indices 
  being  generated. 

lpdoc [MiscOpts] [-l <path1> ... <pathN> ] 
                   [-s <path1> ... <pathN> ] 
                   [-i <idx1> ... <idxN> ] 
                   [-u path_aliases_file ] 
                   -component <file.pl>

  Generate a .texic file for module <file.pl>. The
  optional arguments are as above.

lpdoc [MiscOpts] [-l <path1> ... <pathN> ] 
                   [-s <path1> ... <pathN> ] 
                   [-u path_aliases_file ] 
                   -htmlindex <main> 

  Generate  (part of  an) html   file suitable for
  including in an html page.

lpdoc [MiscOpts] [-l <path1> ... <pathN> ] 
                   [-s <path1> ... <pathN> ] 
                   [-u path_aliases_file ] 
                   -infoindex <main> 

  Generate  an  info directory entry  suitable for
  including in an info directory.

").