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	Thu, 12 Nov 2020 02:42:18 -0800 (PST)
Subject:	Re: Commercial use of cygwin
To:	cygwin AT cygwin DOT com
References:	<CAKc5nKHCNj1uqPEHUDERSH_p+FJGLEG=fH7wiTEwzf9nkwQNBw AT mail DOT gmail DOT com>
Message-ID:	<34a5e2b9-5179-c0b6-e8b0-1245e7a4578f@gmail.com>
Date:	Thu, 12 Nov 2020 11:42:18 +0100
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From:	Marco Atzeri via Cygwin <cygwin AT cygwin DOT com>
Reply-To:	Marco Atzeri <marco DOT atzeri AT gmail DOT com>
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On 12.11.2020 09:42, Antonio Sidoti via Cygwin wrote:
> Hello,
> 
> I was looking into using Cygwin for commercial use, but I couldn't really
> understand if that was ok or not.
> 
>  From here <https://cygwin.com/licensing.html> and here
> <https://www.redhat.com/en/blog/cygwin-library-now-available-under-gnu-lesser-general-public-license>,
> it seems like the basic cygwin library is available under LGPL, so ok to be
> redistributed commercially if linked dynamically.
> 
> When I looked for all the different dlls though, I couldn't really find all
> the licenses. I looked at /usr/share/doc folder but could not find the
> licenses for several packages
> +cygblas-0.dll
> +cyggfortran-4.dll
> +cyggomp-1.dll
> +cyglapack-0.dll
> +cygncursesw-10.dll
> +cygquadmath-0.dll
> +cygreadline7.dll
> 
> Is there any way you could provide some guidance on the topic? Is it
> something you could help with?
> (Of course in exchange of compensation)
> 
> Thanks for your help.
> Antonio
> --

in general there is no restriction on usage.
License are located on:

for lapack and Blas:
$ cygcheck -l liblapack-devel
/usr/share/doc/Cygwin/lapack.README
/usr/share/doc/lapack/LICENSE
/usr/share/doc/lapack/README.md

for gcc/fortran and gomp

$ cygcheck -l gcc-core | grep COPYING
/usr/share/doc/gcc/COPYING
/usr/share/doc/gcc/COPYING.LIB

for ncurses

$ cygcheck -l ncurses | grep COPYING
/usr/share/doc/ncurses/COPYING

there are same restrictions if you plan to incorporate
the tools in your own software tif you are redistributing it.
(copy of source must also be distributed)


Regards
Marco

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