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From: Eli Zaretskii <eliz@gnu.org>
Newsgroups: gmane.emacs.devel
Subject: Re: [master b3cf281] Unbreak the MinGW build
Date: Sat, 17 Dec 2016 09:40:03 +0200
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Cc: eggert@cs.ucla.edu, emacs-devel@gnu.org
To: Stephen Leake <stephen_leake@stephe-leake.org>
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> From: Stephen Leake <stephen_leake@stephe-leake.org>
> Cc: Paul Eggert <eggert@cs.ucla.edu>,  emacs-devel@gnu.org
> Date: Fri, 16 Dec 2016 16:16:44 -0600
> 
> mingw has several "threads" libraries;
> 
> 
> mingw64/mingw-w64-x86_64-npth 1.2-2
>     New portable threads library (mingw-w64)
> mingw64/mingw-w64-x86_64-port-scanner 1.3-2
>     A multi threaded TCP port scanner from SecPoint.com (mingw-w64)
> mingw64/mingw-w64-x86_64-winpthreads-git 5.0.0.4573.628fdbf-1 (mingw-w64-x86_64-toolchain) [installed]
>     MinGW-w64 winpthreads library
> 
> which one should I use?

None.  On Windows we use the native OS threads, so no auxiliary
libraries are necessary.