martin@mvath.de Martin Väth martin@mvath.de Martin Väth mailto:martin@mvath.de vaeth/chessproblem Build with upstream's CXXFLAGS/LDFLAGS for debugging support; not recommended for normal use. Install multithreading version Accept upstream's choices for CXXFLAGS/LDFLAGS for optimization. Absense of this USE flag does not strip user's *FLAGS Use signal propagation for thread pruning. Requires more memory; it is faster in some cases, but slower in others Adds several more agressive CXXFLAGS/LDFLAGS for optimization like graphite (if available). May cause trouble with some buggy compiler versions. Absense of this USE flag does not strip user's *FLAGS Do not limit number of threads by hardware_concurrency. Useful only for debugging