when codegening external procedure declarations, check for existing declarations.
when codegening external procedure declarations, check for existing declarations.

iamrekcah/clay,mario-campos/clay,aep/clay,mario-campos/clay,mario-campos/clay,aep/clay,mario-campos/clay,iamrekcah/clay,jckarter/clay,mario-campos/clay,aep/clay,iamrekcah/clay,aep/clay,jckarter/clay,jckarter/clay,iamrekcah/clay,aep/clay,iamrekcah/clay,aep/clay,jckarter/clay,jckarter/clay,jckarter/clay