mount.h error in configure for pure-ftpd on OpenBSD 3.3 ports

[Peter H. Coffin]

Building pure-ftpd from ports on an OpenBSD 3.3 system, and got the
following message during the ./configure phase:

configure: WARNING: sys/mount.h: present but cannot be compiled
configure: WARNING: sys/mount.h: check for missing prerequisite headers?
configure: WARNING: sys/mount.h: proceeding with the preprocessor's
result
configure: WARNING:     ## ------------------------------------ ##
configure: WARNING:     ## Report this to address@hidden ##
configure: WARNING:     ## ------------------------------------ ##

What other information should I collect?

-- 
77. If I have a fit of temporary insanity and decide to give the hero the 
    chance to reject a job as my trusted lieutentant, I will retain enough 
    sanity to wait until my current trusted lieutenant is out of earshot 
    before making the offer.  --Peter Anspach's Evil Overlord List