Re: bison: new module

[Bruno Haible]

Hi Akim,

> I was suggesting that the macro _itself_ could just
> run bison on a file with the %require.

This sounds better than the existing code that runs '--version'.

What about users who have non-released versions installed?
I think the %require solution will be on par with the --version
solution, right?

What about competing programs (like e.g. clang claims compatibility
with gcc)? Do competing programs for bison exist and need to be
worried about?

At configure time, both solutions are nearly on par: the time to
create a temporary file is negligible. And both will fail the same
way for a 'bison' program that references missing shared libraries.

Patch welcome!

Bruno