HAVE_CLOCK_MONOTONIC

ifdef HAVE_CLOCK_MONOTONIC
CPPSRCS += TimeStamp_posix.cpp
else ifeq ($(OS_ARCH),Darwin)
CPPSRCS += TimeStamp_darwin.cpp
else ifeq ($(OS_ARCH),WINNT)
CPPSRCS += TimeStamp_windows.cpp
else
CPPSRCS += TimeStamp_posix.cpp
endif