Collecting the following updates: - Fixed the RPM dependency set up by FindHDF5.cmake, not to be confused by the HDF5 version that we may build ourselves; - Updated FindBoost.cmake to use Threads::Threads instead of CMAKE_THREAD_LIBS_INIT for setting up the pthread dependency for the Boost libraries; - Updated all projects to instruct CMake's FindThreads.cmake module to prefer the -pthread compiler flag instead of the -lpthread linker option.