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From:	Ken Brown <kbrown AT cornell DOT edu>
Subject:	Re: [ANNOUNCEMENT] TeX Live 2018
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On 4/29/2018 9:33 AM, Marco Atzeri wrote:
> On 4/29/2018 11:25 AM, Lemures Lemniscati wrote:
>> Thank you, Marco!
> ..
>> On each systems, there appeared a dialog telling something like that:
>>
>>    The procedure entry point 'glBegin' could not be located in the
>>    dynamic link library 'cygOSMesa-8.dll'
>>
>> Regards,
>>
> 
> I would say that libOSMesa8 had a modification in the list of
> exported symbols in the last version.
> 
> 
> [TXT]    libOSMesa8-17.3.5-1    21-Feb-2018 09:50     267
> [TXT]    libOSMesa8-17.3.8-1    05-Apr-2018 12:44     267
> [TXT]    libOSMesa8-18.0.1-1    23-Apr-2018 07:35     267
> 
> I do not see  glBegin in the last cygOSMesa-8.dll of 18.0.1-1
> So it seems there is an issue on the last libOSMesa8 package

Thanks for tracking this down, Marco.  So the workaround is to downgrade 
to the previous version of libOSMesa8.

I noticed that for the latest mesa, Yaakov switched from an autotools 
build to a meson build.  I wonder if the problem with cygOSMesa-8.dll is 
an unintended side effect of that switch.  I tried building mesa-18.0.1 
using autotools instead of meson (taking the configure arguments from 
the cygport file used for mesa-17.3.8), and the resulting 
cygOSMesa-8.dll does export glBegin.

Ken

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