I got this error:

/netbsd: sd2 (atzsc0:6:0): medium error info = 347968 (decimal)

Does this mean that there is a physical error on the disk?  That's my 
guess.  Does NetBSD map these types of errors out?  Or has data been 
lost?  I was doing a write when this occured.  Is this anything to worry 
about?

During compilation of the /usr/src tree, I ran into a few errors: make 
does not know how to compile libl and rdist.  make doesn't seem to know 
how to compile libmain.c --> libmain.c is not in the same directory as 
libl.  I did find a libmain.c, which appears to be a file generated by 
lex in another part of the tree.  Is this the same libmain?  
Additonally, rdist seems to break down from lex related problems.  

I later got warnings during compile of tn3270 about mismatched 
declarations in the functions initTerminal and TransOut.  Is this 
anything to be worried about?  Is this problem related to the prior errors?

--
 o/ \o/  o  <o   o  o   o    She walks in  beauty, like the night
<|   |  /|\  |> <|><|> <|\       Of cloudless climes and starry skies;
/|  / \  /| / \ //  \\ / \   And all that's best of dark and bright
""""""""""""""""""""""""""""     Meet in her aspect and her eyes.  (Byron)