Error while compiling bro

[kerberos kkk]

The bro version i am using is bro-0.7a48 and platform is
OpenBSD park 2.8 GENERIC#399 i386

I am getting the following error while trying to compile bro:
Any pointers will be helpful.

thanks a lot

>>make
c++ -o bro main.o net_util.o parse.o scan.o re-parse.o re-scan.o util.o  
Attr.o BackDoor.o BroString.o CCL.o CompHash.o Conn.o DFA.o Desc.o  Dict.o 
Discard.o DNS.o EquivClass.o Event.o Expr.o File.o Finger.o  Frag.o Frame.o 
FTP.o Func.o Hash.o HTTP.o ICMP.o ID.o Ident.o  InterConn.o List.o Logger.o 
Login.o NFA.o NVT.o Net.o NetVar.o  Obj.o OtherTCP.o PktSrc.o Portmap.o 
PriorityQueue.o Queue.o Reassem.o  Rlogin.o RE.o RPC.o Scope.o Sessions.o 
SteppingStone.o Stmt.o  TCP.o Telnet.o Timer.o Type.o UDP.o Val.o Var.o 
XDR.o  cq.o nb_dns.o setsignal.o version.o  -Lbind8/lib -lbind 
../libpcap-0.4/libpcap.a  -lm
setsignal.o: Undefined symbol `_sigset' referenced from text segment
collect2: ld returned 1 exit status
*** Error code 1



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