bug#13514: unintentional regression with AC_CONFIG_MACRO_DIR in 1.13.1

[Stefano Lattarini]

On 01/23/2013 12:04 PM, Pavel Raiskup wrote:
>> [..skip..]
>> Maybe the current error should be demoted to a warning, to allow us to
>> be more forward-compatible with such possible future scenarios?
> 
> I vote for this approach.
>
I'm starting to be convinced myself that it is the best one.

But then again, mulling over the issue a little longer, I've come to realize
that autoreconf takes care of re-executing aclocal after (and if) libtoolize
is run, which makes my previous concerns about the "wrong execution order"
mostly moot, and might give a valid use case for not having an error nor a
warning if the "primary" m4 macro dir doesn't exist.

So, what should we do in the end?

> It was also proposed some time ago (it is
> transitively hyper-linked from here already):
> 
>   http://lists.gnu.org/archive/html/automake-patches/2010-02/msg00030.html
> 
Thanks for the reference.

> It must be adopted to current revision & I would maybe switch the msg channel
> from 'unsupported' to 'portability' if I understand its purposes.
> 
I think the 'unsupported' category is fine (if we finally decide to go down
the "give a warning" road).

Regards,
  Stefano