This is makeindex, version 2.17 [TeX Live 2023] (kpathsea + Thai support).
Scanning style file ./Main.ist...........................done (27 attributes redefined, 0 ignored).
Scanning input file Main.glo....done (1 entries accepted, 0 rejected).
Sorting entries...done (0 comparisons).
Generating output file Main.gls....done (6 lines written, 0 warnings).
Output written in Main.gls.
Transcript written in Main.glg.