Re: m4_map_sep bug (introduced by 2005-06-06 Autoconf patch) breaks Bison

[Paul Eggert]

Stepan Kasal <address@hidden> writes:

> The empty list is represented by an empty string.

Yes, sorry, that's the point that I didn't get.

> 1) c.m4 and lalr1.cc contain:
>       m4_map([b4_symbol_actions], m4_defn([b4_symbol_destructors]))
>       m4_map([b4_symbol_actions], m4_defn([b4_symbol_printers]))
>
> Is it possible that there are no symbols?

No, there has to be at least a start symbol.  It would be nice if the
code worked even with no symbols, but it's not essential.

> To sum up, it seems that I'll come back with quite a huge bison cleanup
> patch, when I find some time.

That would be nice.  Thanks.  There is no rush, though obviously we'd
like to get Bison and Autoconf right.