mmroff(1) on Linux
The text 83ec3c6183ba, as Debian 10 (Buster) shipped it.
cross-reference preprocessor for GNU roff mm macro package
Flags it lists
-
-x
The text 83ec3c6183ba, as Debian 10 (Buster) shipped it.
cross-reference preprocessor for GNU roff mm macro package
-x