This is makeindex, version 2.15 [TeX Live 2011] (kpathsea + Thai support).
Scanning style file ./output.ist...........................done (27 attributes redefined, 0 ignored).
Scanning input file output.glo....done (1 entries accepted, 0 rejected).
Sorting entries...done (0 comparisons).
Generating output file output.gls....done (6 lines written, 0 warnings).
Output written in output.gls.
Transcript written in output.glg.