Avoid CMake name clash for Boost.Thread library #1272
Merged
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FindBoost uses
Boost_THREAD_LIBRARY
to denote the library filename tolink when using Boost.Thread.
HPX_SetupBoost.cmake used
BOOST_THREAD_LIBRARY
as the target to detectthe underlying platform threading library used by Boost.Thread. As
find_library avoids the search if the cache variable exists, this search
was always a no-op.
The temporary name is now instead
BOOST_UNDERLYING_THREAD_LIBRARY
.