On Wed, 18 Dec 2013, Hanspeter Niederstrasser wrote:

>
>> "Between 2.6.0-2 and 2.6.0-3 it was necessary to change
>> one of the dependancies of this package from labl to
>> lablgl-x11."
>> 
>> I don't know how to format an alternative Depends entry, but
>> I think it should be OK for lablgtk2 to depend on either
>> lablgl or labgl-x11.
>
> Alternative Depends use the following format:
>
> Depends: lablgl-x11 | lablgl
>
> The order is important in that Fink will ask you which one you wish to 
> install (assuming neither is currently installed already) in the order listed 
> in the .info, and since most people will just choose 1 (the default), it is 
> wise to put the more useful alternative (according to the maintainer) first 
> in the list (but it is not a requirement).  The .deb encodes both 
> alternatives into its control file, and once a pkg with this list is 
> installed, it should be possible to switch back and forth between the two 
> alternates without the Dependee pkg (lablgtk2 in this case) complaining.
>
> Hanspeter
>

Great, many thank, that will help me to test more 
effectively in future.  I have added this to my local copies 
of the info files.

-- Viv
________________________________________________
Dr Viv Kendon    http://quantum.leeds.ac.uk/~viv
tel: +44 113 343 4864      Physics and Astronomy
Quantum Information Group    University of Leeds


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