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Date: Fri, 8 Aug 2008 20:29:48 +0800
From: "Henry Hu" <henry.hu.sh@gmail.com>
To: "Andriy Gapon" <avg@icyb.net.ua>
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Cc: freebsd-multimedia@freebsd.org
Subject: Re: transcode: 1.0.5_3 => 1.0.6_1 fails at configure(gnome-config)
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In my config.log, I found that there is -pthread in the arguments.
It comes from $LIBAVCODEC_EXTRA_LIBS, which comes from `pkg-config --libs
libavcodec`

$ pkg-config --libs libavcodec
-pthread -L/usr/local/lib -lavcodec -lz -la52 -lfaac -lfaad -lmp3lame -lx264
-lxvidcore -ltheora -lvorbisenc -lavutil -lvorbis -lm -logg

So it is present when libavcodec(ffmpeg) is installed.
So why is it missing in your libavcodec's pkgconfig file?