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Date: Tue, 24 Mar 2015 19:28:51 +0100
From: Tijl Coosemans <tijl@FreeBSD.org>
To: David Chisnall <theraven@FreeBSD.org>
Subject: Re: svn commit: r381955 - head/graphics/gdal
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Cc: Sunpoet Po-Chuan Hsieh <sunpoet@FreeBSD.org>, svn-ports-head@freebsd.org,
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On Mon, 23 Mar 2015 09:18:40 +0000 David Chisnall <theraven@FreeBSD.org> wrote:
> The -pthread flag was proposed for inclusion in UNIX98, but was never
> consistently or widely adopted.  It's basically dead now, though not
> actively harmful.  There is no particular reason to prefer one form to
> the other (-pthread is, in theory, more portable, though theory and
> practice can differ).

POSIX talks about libpthread and -lpthread so that's probably the most
portable now:
http://pubs.opengroup.org/onlinepubs/9699919799/utilities/c99.html