header-related bug - reporting as autoconf requests

Hi,
Running a autoconf 2.57 generated configure script under freeBSD
4.7-STABLE we get the following output:

configure: WARNING: resolv.h: present but cannot be compiled
configure: WARNING: resolv.h: check for missing prerequisite headers?
configure: WARNING: resolv.h: proceeding with the preprocessor's result
configure: WARNING: ## ------------------------------------ ##
configure: WARNING: ## Report this to bug-autoconf@gnu.org. ##
configure: WARNING: ## ------------------------------------ ##
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 bug-autoconf@gnu.org. ##
configure: WARNING: ## ------------------------------------ ##

So: we are reporting as requested.

We have a bug open on this:
http://www.squid-cache.org/bugs/show_bug.cgi?id=627

but just copy me in (I'm no subscrubed to bug-autoconf) and I'll supply
any details you may need to help rectify this.

Cheers,
Rob

-- 
GPG key available at: <http://users.bigpond.net.au/robertc/keys.txt>.