Fix rcS crash caused by floating point arithmetic to enable slower than real-time simulation #12401
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Fixes issue #12400 where floating point lockstep realtime speed factors such as
PX4_SIM_SPEED_FACTOR=0.5
would cause thercS
script to crash. This PR allows floating point (and therefore slower than real-time) lockstep simulation.Preferred solution: use
bc
instead of built-in shell math to support both integer and floating point arithmetic.An extensive list of possible alternative solutions can be found here: https://unix.stackexchange.com/a/40787.