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X-HELO:	treacle.ucs.ed.ac.uk
To:	cygwin AT cygwin DOT com
Subject:	Re: False negative from cygcheck python27.dll (Windows)
References:	<f5b4m5z20ya DOT fsf AT troutbeck DOT inf DOT ed DOT ac DOT uk> <20160901144346 DOT GB2201 AT calimero DOT vinschen DOT de>
From:	ht AT inf DOT ed DOT ac DOT uk (Henry S. Thompson)
Date:	Thu, 01 Sep 2016 15:53:17 +0100
In-Reply-To:	<20160901144346.GB2201@calimero.vinschen.de> (Corinna Vinschen's message of "Thu\, 1 Sep 2016 16\:43\:46 +0200")
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Corinna Vinschen writes:

> On Sep  1 14:39, Henry S. Thompson wrote:
>> This is not new, I don't think, but I thought I'd check if it's a known
>> problem.
>> 
>> Running Cygwin 2.5.2 on Windows 10 (which just forced the Anniversary
>> update on me, various minor irritations to be overcome),
>
> Be glad, be *really* glad, you don't run W10 Enterprise and use a
> WSUS server for updates...

Heh.

>> I see the
>> following:
>> 
>>    > cygcheck python27.dll
>>   Found: C:\WINDOWS\system32\python27.dll
>>   ...     
>>   cygcheck: track_down: could not find MSVCR90.dll
>> 
>> But not surprisingly /c/Python27/python runs just fine, and both strace
>> and depends [1] report that the MSVCR90 dependency is satisfied from
>> 
>>   C:\Windows\WinSxS\amd64_microsoft.vc90.crt_1fc8b3b9a1e18e3b_9.0.30729.9247_none_08e394a1a83e212f\msvcr90.dll
>> 
>> Just a minor irritation, but I'm curious if there's an underlying
>> reason, or it's a bug.
>
> There's a reason and it's that WinSxS stuff.  It works with invisible
> redirections so the path itself is not in the usual DLL search path.
> We could add the WinSXS dir and all subdirs, but is it worth it?

Hmm, maybe on request (i.e. another flag) -- given that there may be
multiple subdirectories of WinSxS, knowing which one is getting used can
be of real value in tricky situations...

ht
-- 
       Henry S. Thompson, School of Informatics, University of Edinburgh
      10 Crichton Street, Edinburgh EH8 9AB, SCOTLAND -- (44) 131 650-4440
                Fax: (44) 131 650-4587, e-mail: ht AT inf DOT ed DOT ac DOT uk
                       URL: http://www.ltg.ed.ac.uk/~ht/
 [mail from me _always_ has a .sig like this -- mail without it is forged spam]

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