Android-specific graphical/gameplay glitches

[CometHunter92]

There are graphical/gameplay glitches on the Android version of the core, that I don't have on Windows. My device is powerful enough, with fast-forward it goes well beyond 90fps, so it isn't something related to performances. I tried different Retroarch options, the issue seems to be intrinsic to the core. The most obvious one happens in Daytona USA (USA), on the second track (Dinosaur canyon) when you exit the tunnel the game freezes for a brief moment and enemy cars are instantaneously scattered. Sometimes your car is thrown in the air like if you crash on an invisible wall. More often the camera glitches out after exiting the tunnel, rotating around the car without a reason. I tried to compile my own core with different optimization flags, but it doesn't change anything.

[CometHunter92]

Uhm, forcing the -O1 flag seems to solve the issues...