Hi,

Please find attached a small patch that i have for quite some time in
my local NetBSD tree that makes mandoc warn about unknown volume/arch
in Dt macro arguments.

njoly@petaure [~]> grep '^\.Dt '/usr/share/man/man8/i386/mbr.8
.Dt MBR 8 i386
njoly@petaure [~]> cat /usr/share/man/man8/i386/mbr.8 | mandoc -Tlint
njoly@petaure [~]> cat /usr/share/man/man8/i386/mbr.8 | sed 's,i386$,dummy,'| mandoc -Tlint
<stdin>:3:11: WARNING: unknown manual volume/arch

Regards.

-- 
Nicolas Joly

Biology IT Center
Institut Pasteur, Paris.