Sorry, I did miss that the variables were the accuracy outputs. These should indeed be available/active in BSEC, but the bsec_integration.c sample code does not pass these values to the 'callback' function (output_ready), therefore the variables are really not used and thus the compilation warning.
I think the confusion came from the fact that basic_config_state.ino and checkIaqSensorStatus() are both from the BSEC Arduino library (i.e. library to use BSEC in Arduino IDE sketches), while the 4 variables listed seem to be found in bsec_integration.c (generic C-code sample code), that have small differences in their interfaces.
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