unifdef(1) on OpenBSD
The text ea8da7a330b1, as OpenBSD 2.4, OpenBSD 2.3, OpenBSD 2.2, OpenBSD 2.1 shipped it.
remove ifdef'ed lines
Flags it lists
-
-D -
-U -
-c -
-iD -
-iU -
-l -
-t