This is makeindex, portable version 2.12 [26-May-1993].
Scanning style file keywords.ist..........
** Input style error (file = keywords.ist, line = 52):
   -- Unknown specifier lethead_prefix.
** Input style error (file = keywords.ist, line = 53):
   -- Unknown specifier lethead_suffix.
** Input style error (file = keywords.ist, line = 54):
   -- Unknown specifier lethead_flag.
...
** Input style error (file = keywords.ist, line = 60):
   -- Unknown specifier \endinput.
done (13 attributes redefined, 4 ignored).
Scanning input file keywords.idx....done (506 entries accepted, 0 rejected).
Sorting entries.......done (4623 comparisons).
Generating output file keywords.ind....done (350 lines written, 0 warnings).
Output written in keywords.ind.
Transcript written in keywords.ilg.
