#
# Boost_USE_DEBUG_LIBS: When OFF, disables debug libraries.
# Boost_USE_RELEASE_LIBS: When OFF, disables release libraries.
+# Boost_USE_MULTITHREADED: When ON, uses multithreaded Boost libraries.
+# When OFF, uses single-threaded libraries.
+# The default is to use either.
# Boost_USE_STATIC_LIBS: When ON, uses static Boost libraries; when OFF,
# uses shared Boost libraries; when not set, uses
# static on Windows, shared otherwise.