Re: Creating a top level definition if none so far exists, on the fly.

[Mike Gran]

> From: Richard Shann <address@hidden>
>>  > From: Richard Shann <address@hidden>
>>  > 
>>  > I have just started using GNU/Denemo under the guile 2.x and the
>>  > following construct no longer works:
>>  > 
>>  > (if (not (defined? 'ToggleFiguredBassMode::Active))
>>  >     (define ToggleFiguredBassMode::Active #f))
>> 
>>  I remember Andy once suggested on this list that
>>   
>>  (define-once ...) 
> 
> Thank you! that works perfectly. Now there is the question of
> supporting both guile 2.0 and 1.8 users. I seem to remember this came
> up in another context, but unfortunately upgrading to Debian Wheezy has
> lost me any easy access to my old emails.
> I'll have a delve around to see if it can be done, but if anyone just
> knows off the top of their head please say.

Try looking at the various responses to this thread

http://lists.gnu.org/archive/html/guile-user/2013-02/msg00173.html

-Mike