3dnow and 3dnowext have not existed on approximately half of all systems, and even on AMD systems since ~2010. mmxext exists on even fewer systems. These flags should not be enabled by default. Reproducible: Always
given they add negligible compile time and binary size felt more sensible leave them on for the time being. 3dnow is being phased out soon even upstream when the sse version provide a decent alternative. I'd make them disabled on the next major revision. Thanks for reporting.
