Re: Old generated parser code not working on recent system (Fedora Core 5)

[Hans Aberg]

On 2 Feb 2007, at 22:25, Christian Kreibich wrote:

> I'm having a bison-related problem that I'm hoping you can shed some
> light on. I co-maintain a software package that ships bison-generated
> parser code alongside the .y file, for setups that don't have bison
> installed.  The problem we're seeing is that on some recent platforms
> (Fedora Core 5, for example) the generated parser code is always
> failing. Removing the generated code and regenerating it with the  
> local
> bison (2.1, in the FC5 case) fixes the problem. In the particular
> release in question, the shipped parser code was generated with a  
> rather
> old bison (1.75).
>
> Since the diff between the generated parsers is 1500+ lines, it's not
> trivial to pinpoint what might be causing the problem. Do you have any
> idea why oldish bison output might start to fail on recent platforms?

The basic principle is that folks don't remember those old Bison  
versions, or what they might generate. :-) Formally, only the latest  
version is supported. In practice, it means that there have been a  
lot of development and bug-fixing taking place.

  Hans Aberg