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I recently attended an embedded Linux course that stated that uClibc does not support the use of pthreads and that it only supports linuxthreads. Furthermore, the course instructor implied that linuxthreads were next to useless. However, when reading a number of online articles, the implication is that they are in fact supported. Furthermore, when building a root file system and kernel image for a target embedded device using buildroot, I can see that I have libpthread-0.9.33.2.so and libpthread.so.0 files in the /lib directory of my target root file system. I am really confused about the nature of the conflicting information I have received and would be very grateful if anyone could actually clarify the situation for me.

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Look at the project's website? It is open source, after all... –  vonbrand Jan 21 '13 at 23:51

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Starting with version 0.9.32 (released 8 june 2011), uClibc is supporting NPTL for the following architectures: arm, i386, mips, powerpc, sh, sh64, x86_64.

Actually, both are an implementation of pthreads and will provide libpthread.so.

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