configure problem

[Matthew Libhart]

Hello net-snmp-coders,   I really hope this isn't a stupid-user issue.  I downloaded 5.2.1 source and tried to run configure on a Solaris 8 box.  First and only thing it gave me is:   configure: error: cannot find sources (agent/mibgroup/ucd-snmp/extensible.c) in . or ..   extensible.c file is not there.   Thanks.