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Subject:	Re: Solved: R-3.3.3-1: unable to load stats.dll
To:	cygwin AT cygwin DOT com
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From:	cyg Simple <cygsimple AT gmail DOT com>
Message-ID:	<b631b447-b71a-c768-0c33-5646347fc03e@gmail.com>
Date:	Fri, 31 Mar 2017 15:32:15 -0400
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On 3/31/2017 12:57 PM, Marco Atzeri wrote:
> On 31/03/2017 15:35, cyg Simple wrote:
>> On 3/28/2017 3:17 PM, Oliver Schoett wrote:
>>> Achim Gratz wrote:
>>>> Try
>>>>
>>>> $ cygcheck /usr/lib/R/library/stats/libs/stats.dll
>>>>
>>>> instead.  On a hunch, check your PATH and make sure it contains
>>>> "/usr/lib/lapack".
>>>
>>> The cygcheck command ends with
>>>
>>>    cygcheck: track_down: could not find cyglapack-0.dll
>>>
>>> That library can be found in /usr/lib/lapack, and adding this directory
>>> to the PATH fixes the problem: Rscript now starts without error message.
>>>
>>
>> Which is why the packager should move the required .dll to the /usr/bin
>> directory.  Was there a stated change to this policy?
> 
> No.
> If you compare openblas and lapack you will find two cygblas-0.dll,
> that I can not make coexist in /usr/bin
> 

And so we add to PATH and still have a problem if the lapack and
openblas versions are different.  Adding to PATH doesn't fix the issue
and if I add the openblas version before lapack then lapack suffers and
vice-versa. This is the reason we've put DLL in the /usr/bin directory
because adding to PATH is meaningless.

Perhaps
https://msdn.microsoft.com/en-us/library/windows/desktop/hh310513(v=vs.85).aspx
should be used in the main function or a Cygwin API developed to do
that.  Or fix lapack to name it's library with a different version id.
If there are API/ABI differences, then -0 isn't correct since the two
cannot overlay each other.

-- 
cyg Simple

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