<div dir="ltr">Hi,<br><br>I am trying to set a prerequisite pass.<br><br><br>void PassName::getAnalysisUsage(AnalysisUsage &AU) const <br>    {<br>        AU.setPreservesAll();<br>        AU.addRequired<LiveVariables>();<br>
    } <br><br>But when i am running the pass with the opt i get this error:<br>undefined symbol: _ZN4llvm13LiveVariables2IDE<br><br>If you need more information ...<br><br>Thank you.<br></div>