# Link error

**URL:** https://community.zeek.org/t/link-error/193
**Category:** Zeek
**Created:** [September 27, 2001, 2:01am UTC](https://community.zeek.org/t/link-error/193 "2001-09-27T02:01:34Z")
**Posts on this page:** 3
**Page:** 1

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### Author: ![Vern](https://yyz1.discourse-cdn.com/flex011/user_avatar/community.zeek.org/vern/32/630_2.png) [@Vern](https://community.zeek.org/u/Vern)
#### Post date: [September 27, 2001, 2:01am UTC](https://community.zeek.org/t/link-error/193/1 "2001-09-27T02:01:34Z")

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> parse.o: Definition of symbol `\_yylhs' (multiply defined)  
> ../libpcap-0.6.2/libpcap.a(grammar.o): Definition of symbol `\_yylhs'

Looks like Bro got built using a version of yacc that doesn't support -p,  
while presumably the other version of Bro was built with a version of  
yacc that does.

&nbsp;&nbsp;&nbsp;&nbsp;Vern

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### Author: ![Ashley\_Thomas1](https://avatars.discourse-cdn.com/v4/letter/a/13edae/32.png) [@Ashley\_Thomas1](https://community.zeek.org/u/Ashley_Thomas1)
#### Post date: [September 30, 2001, 6:24am UTC](https://community.zeek.org/t/link-error/193/2 "2001-09-30T06:24:15Z")

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Hi ,

Could you suggest a freely available tool to generate traffic on the network  
for  
measuring IDS's behaviour. It would be great if the tool can generate a  
variety of  
traffic and bursty/continuous behaviour.

thanks  
Ashley

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### Author: ![system](https://canada1.discourse-cdn.com/flex011/uploads/zeek/original/1X/f09d732bc2cc7c7cc7e35db67cf4e1d5233ce7a7.png) [@system](https://community.zeek.org/u/system)
#### Post date: [May 6, 2022, 3:36pm UTC](https://community.zeek.org/t/link-error/193/3 "2022-05-06T15:36:23Z")

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