>> graphics/netpbm package cannot be built under Interix 3.5 using
 >> pkgsrc-2006Q3 and HEAD. Complete log is here
 >> http://home.duh.org/interix-pkgstat/20061110.1257/graphics/netpbm/.broken.html

 >> 
 >> It is not pkgsrc bug -- this is why I mark this PR as change-request.
 >> Because of graphics/netpbm >800 packages cannot be built -- this why I mark it critical.

>  What does upstream they about this? I think it is reasonable, but it
>  might be better to talk with the authors first. Infact, doing a real
>  configure check would be a better idea.
If I were upstream, I could tell "our software is correct, talk to microsoft",
but this is loooong way. I'll notify png upstream maintainers anyway.

-- 
Best regards, Aleksey Cheusov.