gmtstitch(1gmt) on Linux
The text 849fcb13ecb5, as Debian 7 (Wheezy) shipped it.
Join line segments whose end points match within tolerance
Flags it lists
-
-: -
-C -
-D -
-H -
-L -
-Q -
-T -
-V -
-bi -
-bo -
-f -
-m