The libxml2 library can be downloaded at http://xmlsoft.org† .
When building libxml version 2 2.6.22, you can get unresolved symbols to pthreads symbols such as:
Verified as of the libxml2 2.6.22 package, the configure script determines how to link in the pthread library, but for Linux* it assumes the compiler is the GNU gcc compiler and so assumes libpthread is linked in automatically.
If you upgrade to a more recent version of libxml2, it will avoid this problem. Version 2.6.27 of libxml2 is known to resolve this problem.
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