[Groff] Using Make with pdfmom

[Koz Ross]

I have the following directory layout:

Makefile
LICENSE
README.md
src:
    en:
       main.mom
       ch01.mom
       ch02.mom
       ...
    ru:
       main.mom
       ch01.mom
       ch02.mom
       ...

In each case, main.mom INCLUDEs ch01.mom etc. When I write a Makefile rule, I 
first tried using the -I directive to add the folder containing all the chapter 
files to the search path, but when I tried that, I got this:

Unknown option: I
Unknown option: .
Unknown option: /
Unknown option: r
Unknown option: c
Unknown option: /
Unknown option: r

I've come up against this before with vanilla groff. Thus, I had to formulate 
the command to cd into the right directory first, then build there. Is this the 
only way I can do this, or am I missing some option I could use instead?
-- 
Koz Ross <address@hidden>
www.retro-freedom.nz
If you aren't using GPG, you should be! https://emailselfdefense.fsf.org/en.
***
Please don't send me Word or PowerPoint attachments. See 
http://www.gnu.org/philosophy/no-word-attachments.html for why.
***
Proud member of the Open Wireless Movement. Find out more at 
https://openwireless.org/


-- 
Koz Ross <address@hidden>
www.retro-freedom.nz
If you aren't using GPG, you should be! https://emailselfdefense.fsf.org/en.
***
Please don't send me Word or PowerPoint attachments. See 
http://www.gnu.org/philosophy/no-word-attachments.html for why.
***
Proud member of the Open Wireless Movement. Find out more at 
https://openwireless.org/

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