Re: Regression in 2.4 ??

[Joel E. Denny]

On Sun, 9 Nov 2008, Nelson Ferreira wrote:

> Attached is the .y file.
> This is a part of the SXEmacs source, where we had a report of a build failure
> with bison 2.4 which we tracked down to this behavior.
> The relevant files would be under modules/cl.
> You can get them from http://downloads.sxemacs.org
> 
> As far as defining manually the YYSTYPE I did it by adding on line 30:
> 
> typedef int YYSTYPE;

If YYSTYPE needs to default to an int, then it doesn't make sense to 
declare semantic types, which are fields of a union YYSTYPE.  For example, 
you have:

  %token <forkeys>

Bison 2.3 ignored this.  Bison 2.4 logically assumes you want a union when 
you use a <...> construct.  Moreover, POSIX requires the corrected 
behavior as discussed in the NEWS entry for Bison 2.3a.

I'm going to assume the other issues you mentioned are symptoms of this 
problem.  Let us know if this doesn't fix them.