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Subject:	Re: Trying to install older version (9.50) of ghostscript - still got
	9.52
To:	cygwin AT cygwin DOT com
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Message-ID:	<2df76811-27dd-fc4b-9898-115660ea4f00@jhmg.net>
Date:	Wed, 20 May 2020 12:30:57 -0700
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From:	Jim Garrison via Cygwin <cygwin AT cygwin DOT com>
Reply-To:	jhg AT acm DOT org
Cc:	Jim Garrison <jhg AT jhmg DOT net>
Errors-To:	cygwin-bounces AT cygwin DOT com
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On 5/20/2020 11:50 AM, Maarten Hoes via Cygwin wrote:
> Hi,
> 
> On Wed, May 20, 2020 at 2:36 AM Jim Garrison via Cygwin <cygwin AT cygwin DOT com>
> wrote:
> 
>> The current version of ghostscript is 9.52, but I need to install the
>> previous version, 9.50.  I asked setup_x64.exe to replace 9.52 with
>> 9.50, but after doing this gs --version still said 9.52.
>>
>> The problem seems to be that downgrading ghostscript from 9.52 to 9.50
>> does not also downgrade its dependency libgs9 back to 9.50.  Is this
>> something the setup system could handle, or is it just something
>> one must know to look for when downgrading packages?
>>
>> I also tried uninstalling ghostscript 9.52 and reinstalling, but
>> that didn't touch libgs9 either.
>>
>> --
>> Jim Garrison jhg AT acm DOT org
>>
> 
> 
> Hi,
> 
> I recently [1] had a similar question. Turns out you have to take care of
> dependencies/prerequisites yourself. It's a manual process that you have to
> take care of yourself; setup does not and cannot take care of this for you.
> You manually have to figure out what package version go together.
> 
> However, I did find this website [2] that archives Cygwin packages releases
> by date, so that in essence you can go back to a specific date on which
> DD-MM-YYYY all packages were current in the past. I guess you could use
> that to go back to the ghostscript release you want. But this does mean
> that:
> 
> [a]
> I'm guessing this is not a 'supported cygwin configuration'
> 
> [b]
> You will downgrade to *all* other packages that were 'current' at that date.
> 
> 
> Not sure if this helps, and hoping someone else has a better answer,
> 
> 
> - Maarten
> 
> 
> [1]
> https://cygwin.com/pipermail/cygwin/2020-May/244772.html
> 
> 
> [2]
> http://www.crouchingtigerhiddenfruitbat.org/Cygwin/timemachine.html

I didn't have to go back to a snapshot of the entire Cygwin
installation. I was able to get what I needed by downgrading
libgs9 as well.


-- 
Jim Garrison jhg AT acm DOT org
--
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