[Samba] warnings when running configure for samba3.0.2a on FreeBSD 5.2.1 Release

[Litel Wang]

Should I do anything to the following ?
And how to do it ?  Thanks .
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configure: WARNING: net/if.h: present but cannot be compiled
configure: WARNING: net/if.h: check for missing prerequisite headers?
configure: WARNING: net/if.h: proceeding with the preprocessor's result
configure: WARNING: rpcsvc/yp_prot.h: present but cannot be compiled
configure: WARNING: rpcsvc/yp_prot.h: check for missing prerequisite headers?
configure: WARNING: rpcsvc/yp_prot.h: proceeding with the preprocessor's result
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: netinet/ip.h: present but cannot be compiled
configure: WARNING: netinet/ip.h: check for missing prerequisite headers?
configure: WARNING: netinet/ip.h: proceeding with the preprocessor's result