# link error while compiling
**URL:** https://community.zeek.org/t/link-error-while-compiling/163
**Category:** Zeek
**Created:** [June 25, 2001, 8:24pm UTC](https://community.zeek.org/t/link-error-while-compiling/163 "2001-06-25T20:24:47Z")
**Posts on this page:** 2
**Page:** 1
### Author:  [@thomas\_thomas](https://community.zeek.org/u/thomas_thomas)
#### Post date: [June 25, 2001, 8:24pm UTC](https://community.zeek.org/t/link-error-while-compiling/163/1 "2001-06-25T20:24:47Z")
Hi,
I am using bro version 0.7a62 and openBSD 2.8
I was using libpcap-0.4 and everything was compiling perfectly.
Now i moved to libpcap-0.6.2 and it give this link error while compiling.
I changed the libpcap and again it works perfectly.
regards
tom
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 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-0.6.2/libpcap.a -lm
parse.o: Definition of symbol `\_yylhs' (multiply defined)
parse.o: Definition of symbol `\_yylen' (multiply defined)
parse.o: Definition of symbol `\_yydefred' (multiply defined)
parse.o: Definition of symbol `\_yydgoto' (multiply defined)
parse.o: Definition of symbol `\_yysindex' (multiply defined)
parse.o: Definition of symbol `\_yyrindex' (multiply defined)
parse.o: Definition of symbol `\_yygindex' (multiply defined)
parse.o: Definition of symbol `\_yytable' (multiply defined)
parse.o: Definition of symbol `\_yycheck' (multiply defined)
../libpcap-0.6.2/libpcap.a(grammar.o): Definition of symbol `\_yylhs' (multiply defined)
../libpcap-0.6.2/libpcap.a(grammar.o): Definition of symbol `\_yylen' (multiply defined)
../libpcap-0.6.2/libpcap.a(grammar.o): Definition of symbol `\_yydefred' (multiply defined)
../libpcap-0.6.2/libpcap.a(grammar.o): Definition of symbol `\_yydgoto' (multiply defined)
../libpcap-0.6.2/libpcap.a(grammar.o): Definition of symbol `\_yysindex' (multiply defined)
../libpcap-0.6.2/libpcap.a(grammar.o): Definition of symbol `\_yyrindex' (multiply defined)
../libpcap-0.6.2/libpcap.a(grammar.o): Definition of symbol `\_yygindex' (multiply defined)
../libpcap-0.6.2/libpcap.a(grammar.o): Definition of symbol `\_yytable' (multiply defined)
../libpcap-0.6.2/libpcap.a(grammar.o): Definition of symbol `\_yycheck' (multiply defined)
collect2: ld returned 1 exit status
\*\*\* Error code 1
---
### Author:  [@system](https://community.zeek.org/u/system)
#### Post date: [May 6, 2022, 3:36pm UTC](https://community.zeek.org/t/link-error-while-compiling/163/2 "2022-05-06T15:36:20Z")