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boost-1.34.1 building multiple library variants

It appears that the boost-1.34.1 package is building multiple library
variants; specifically, both thread-safe and non-thread-safe versions of
each library get built and installed.

This is a departure from the boost 1.33.1 package, where only the
thread-safe variants of the libraries were built and installed.

Is this change deliberate? Do we really need the non-thread-safe

This change has some unfortunate consequences. First of all, since there
is no non-thread-safe variant of libboost_thread, there is no more
libboost_thread.so. So someone trying to link with that library (which
existed in the boost 1.33.1 package) will fail. But this isn't the worst
of it. Someone linking with, for instance, -lboost_regex will now get a
variant of the library that *is not* thread-safe--where with
boost-1.33.1 the same -l flag links to a library that *is* thread-safe.

Braden McDaniel                           e-mail: <braden endoframe com>
<http://endoframe.com>                    Jabber: <braden jabber org>

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