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Subject: Re: Solved: R-3.3.3-1: unable to load stats.dll
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To: cygwin AT cygwin DOT com
From: Brian Inglis <Brian DOT Inglis AT SystematicSw DOT ab DOT ca>
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Date: Fri, 31 Mar 2017 14:46:52 -0600
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On 2017-03-31 13:32, cyg Simple wrote:
> 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.

This is the situation alternatives(8) was designed 
for - to mediate names and functions.
If a package is dependent on one or the other, 
its location in /var/lib/pkg/ should be wired in.
My PATH seems to include /usr/lib/lapack, appended by 
/etc/profile.d/lapack0.sh.
Perhaps openblas could provide the same for its clients?

-- 
Take care. Thanks, Brian Inglis, Calgary, Alberta, Canada

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