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Subject: Re: [PHP-DEV] BISON files are gone?
From: sebastian@php.net (Sebastian Bergmann)

Am 06.05.2014 10:50, schrieb Derick Rethans:
> Neither automake (the .am extension in Makefile.am) or bison are used. 
> The automake depency was removed (I think) close to a decade ago, and 
> bison's .y got replaced with re2c files (.re). I think somebody forgot 
> to remove that Zend/Makefile.am file.

 Correct me if I'm wrong, but bison is a parser generator and re2c
 is a scanner generator. We replaced flex with re2c but never got
 around to replace bison with lemon AFAIK.