gmt(1) on Linux
The text 349ce01a9511, as Debian 12 (Bookworm) shipped it.
The Generic Mapping Tools data processing and display software package
Flags it lists
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--PAR -
-: -
-J -
-K -
-O -
-P -
-R -
-V -
-bi -
-bo -
-c -
-i -
-o -
-r -
-t