4.11 has no file_opts.h
6.4 has file_opts.h
11.0-CURRENT & 10.1-p6 moved it down to /usr/src/contrib/file/src/file_opts.h

*** generic-8.2-RELEASE/src/contrib/file/file_opts.h	Tue Dec 27 16:07:47 2011
--- generic-new/src/contrib/file/file_opts.h	Tue Dec 27 16:12:33 2011
***************
*** 24,29 ****
--- 24,30 ----
  OPT('e', "exclude", 1, " TEST         exclude TEST from the list of test to be\n"
      "                               performed for file. Valid tests are:\n"
      "                               ascii, apptype, compress, elf, soft, tar, tokens, troff\n")
+ 					/* JJLATER do we need to append ctm to list ? */
  OPT('f', "files-from", 1, " FILE      read the filenames to be examined from FILE\n")
  OPT('F', "separator", 1, " STRING     use string as separator instead of `:'\n")
  OPT('i', "mime", 0, "                 output MIME type strings (--mime-type and\n"