m4(1) on FreeBSD
The text b831f3d6b0bd, as FreeBSD 3.2-RELEASE, FreeBSD 3.1-RELEASE shipped it.
macro language processor
Flags it lists
-
-D -
-U
The text b831f3d6b0bd, as FreeBSD 3.2-RELEASE, FreeBSD 3.1-RELEASE shipped it.
macro language processor
-D
-U