PROFILE		Builds a profiled version suitable for use with gprof
		This option is only usefull for developers.
		(On most systems, the profile libraries don't exist, so this
		 will fail)
UPROFILE	Generates data for profile-based optimizations.
		Can be used to generate heavily optimized builds... but is
		not trivial to use and does use extra disk space.  Expert
		users only.
GCOV		Generates data for usage by gcov.  Only usefull for developers.
USE_UPROFILE	Uses the UPROFILE generated data for more optimizations.