I need help building a kernel. I'm following the "howto."

When I run make (in the SYSTEM directory that I config'd), it runs for a 
while, but then when it is building the "compat" library, it fails due to 
an invalid option (-q) to tsort. according to the man page, -q is a valid 
option, but my copy of tsort doesn't accept it.

What's wierder, I'm SURE that this worked w/out error once. Then, I typed 
make instead of make depend. I didn't want to wate for it when, so I hit 
^C. This happened to be during the making of "compat," and it said 
"removing <something>.o." Now it always fails when it gets there, as 
indicated above.

Help!

-Avram