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Subject: Re: gem broken ?
To: Brian Clifton <brian AT clifton DOT me>, "cygwin AT cygwin DOT com" <cygwin AT cygwin DOT com>
References: <5495062c-6126-609a-46e1-587a18cb8de2 AT gmail DOT com> <691bacce-80d7-1634-2959-4844fb3f4c50 AT gmail DOT com> <20160627151202 DOT GA8096 AT calimero DOT vinschen DOT de> <BL2PR03MB228B6D4E603319029769AB0DF210 AT BL2PR03MB228 DOT namprd03 DOT prod DOT outlook DOT com>
From: Marco Atzeri <marco DOT atzeri AT gmail DOT com>
Message-ID: <0de70a28-4205-1071-57a1-55e47d318fe0@gmail.com>
Date: Mon, 27 Jun 2016 18:31:29 +0200
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On 27/06/2016 18:18, Brian Clifton wrote:

>> On Jun 27 15:53, Marco Atzeri wrote:
>>> On 27/06/2016 15:19, Marco Atzeri wrote:
>>>> on both 32bit and 64 bit (W7 X86_64)
>>>>
>>>> $ cygcheck -c rubygems
>>>> Cygwin Package Information
>>>> Package              Version        Status
>>>> rubygems             2.4.8-1        OK
>>>>
>>>> $  gem list
>>>> ERROR:  Loading command: list (Fiddle::DLError)
>>>>         can't load kernel32
>>>> ERROR:  While executing gem ... (NoMethodError)
>>>>     undefined method `invoke_with_build_args' for nil:NilClass
>>>>
>>>>
>>>> First reported on
>>>> http://superuser.com/questions/1093954/gem-not-working-in-cygwin
>>>>
>>>> Regards
>>>> Marco
>>>
>>> it seems a consequence of cygwin 2.5.2
>>
>> Commit 8a31aa3 introduces the problem.  The patch disallows to dlopen
>> libs without specifying the file extension.  This was originally intended
>> by commit df958670 but only worked for paths, not simple filenames.
>>
>> AFAICS this is a more a ruby problem than a Cygwin problem.  It tries to
>> dlopen a DLL called "kernel32".  But dlopen is POSIX, so it should not
>> assume that an extension is added automatically, just as this isn't done
>> on Linux.
>>
>> Hmm, I'm undecided if this should be fixed in ruby or if we need a
>> Cygwin 2.5.3 reverting this patch...
>>
>>
>> Corinna
>
> I ran into this too on Saturday night- I ended up opening the Fiddle file in question and putting the full path (including the extension) to fix the issue. Wish I would have tried with just the extension
>
> The weird thing is- after upgrading, I tried reverting ruby and ruby-gems to older versions but had no luck. Corinna, where did a change occur that caused this to happen? You mention dlopen, which package is this a part of?
>
> Thanks
> Brian

revert cygwin from 2.5.2 to 2.5.1, dlopen is a system call provided
by cygwin1.dll


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