m4(1) on FreeBSD
The text a4d056a6c3bf, as FreeBSD 3.4-RELEASE, FreeBSD 3.3-RELEASE shipped it.
macro language processor
Flags it lists
-
-D -
-U
The text a4d056a6c3bf, as FreeBSD 3.4-RELEASE, FreeBSD 3.3-RELEASE shipped it.
macro language processor
-D
-U