Re: how do I use two versions of cygwin on one machine?

[Christopher Faylor <cgf-rcm at cygwin dot com>]

On Tue, Oct 14, 2003 at 02:23:24PM -0400, Igor Pechtchanski wrote:
>On Tue, 14 Oct 2003, Max Bowsher wrote:
>>Jim Perkins wrote:
>>>I looked in the FAQ, I searched the archives, and I searched on
>>>deja.com with no luck.  I have been using cygwin for quite a while and
>>>I'm dependent on it.  Recently I started working with a new single
>>>board computer.  The compile environment is an older version of cygwin.
>>>More recent versions of cygwin don't work properly for this compiling
>>>task.  I don't mind using an older version but the one the manufacturer
>>>sent is very stripped down and is basically only good for running
>>>"make".  So, I figured I could just have two versions of cygwin on my
>>>machine and only use one at a time.  So far I have not been able to do
>>>it.  Any suggestions?
>>
>>Short answer: You can't.
>>
>>Long answer: There are ways, but they are *very* inelegant.
>>Essentially, you would have to manually switch the data stored in the
>>registry to that for the appropriate version of Cygwin.  Naturally,
>>close all cygwin processes whilst doing so.  If you have the Cygwin bin
>>directory in PATH, you will have to change that too, every time.
>>
>>If you do take this route, be very aware that list explicitly does not
>>support modified installs of Cygwin like the above.
>
>If you install the two versions as two different users and are willing
>to switch users whenever you want to switch the versions, you may not
>have to do the above as long as the user mounts are set up correctly.
>Just make sure you don't have the two versions of cygwin1.dll loaded at
>the same time (e.g., don't run any services).

I have a more generic question.  Newer cygwin DLLs are supposed to work
with older applications.  What specific problem are you having with the
older app?  You only say that it doesn't "work properly".

We want to fix cygwin so that this doesn't happen.

What is your specific problem?

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