Re: [Groff] Included files are not preprocessed

[Tadziu Hoffmann]

> Files included via .mso, .so, or -m, are never run through
> preprocessors.

That's why soelim was invented

  http://lists.gnu.org/archive/html/groff/2003-01/msg00069.html

(at least for .so, don't know about .mso or -m).