m4(1) on OpenBSD
The text 179b2fee27ca, as OpenBSD 2.5, OpenBSD 2.4 shipped it.
macro language processor
Flags it lists
-
-D -
-U
The text 179b2fee27ca, as OpenBSD 2.5, OpenBSD 2.4 shipped it.
macro language processor
-D
-U