This is makeindex, portable version 2.12 [26-May-1993].
Scanning style file /opt/local/lib/texmf/tex/latex2e/base/gglo.ist........
** Input style error (file = /opt/local/lib/texmf/tex/latex2e/base/gglo.ist, line = 51):
   -- Unknown specifier lethead_prefix.
** Input style error (file = /opt/local/lib/texmf/tex/latex2e/base/gglo.ist, line = 52):
   -- Unknown specifier lethead_suffix.
** Input style error (file = /opt/local/lib/texmf/tex/latex2e/base/gglo.ist, line = 53):
   -- Unknown specifier lethead_flag.
......done (14 attributes redefined, 3 ignored).
Scanning input file siggraph.glo....done (20 entries accepted, 0 rejected).
Sorting entries....done (89 comparisons).
Generating output file siggraph.gls....done (43 lines written, 0 warnings).
Output written in siggraph.gls.
Transcript written in siggraph.ilg.