Can't find yyreset in bison 2.4.1 for linux

[Li, Li-Wei]

Hi
 
Could someone please tell me where I can find the yyreset definition ?
 
I downloaded and build bison 2.4.1 to my redhat 3.6 box, but yyreset is
not there.
 
Many thanks in advance.
 
/li-wei


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