References:
  <http://debbugs.gnu.org/cgi/bugreport.cgi?bug=11146>
  <http://lists.gnu.org/archive/html/bug-bison/2012-04/msg00002.html>

On 04/01/2012 03:11 PM, Stefano Lattarini wrote:
> On 04/01/2012 02:30 PM, Stefano Lattarini wrote:
>>
>> Most importantly, is the '--tidy' option supported by all recently-ish
>> Texinfo releases, or has it been introduced too recently to mandate its
>> use in Automake-generated recipes?
>>
> I'll answer myself on this, by quoting the Texinfo NEWS file:
> 
>   4.9 (29 June 2007)
>   * GPLv3.
>   * texi2dvi:
>     . new mode --build=tidy which supports compilation in a separate
>       directory, where intermediate files are preserved.
> 
> So the option is almost five years old, and thus old enough to be
> required in Automake 1.12.
>
On a second thought, bumping the requirement is something better done
for Automake 1.13, after having given proper warnings in the NEWS file.
For Automake 1.12, we might simply explicitly add the '--clean' option
to the texi2dvi invocation.

I'll thus apply to two attached patches to master in a couple of days
if there is no objection.

Regards,
  Stefano