A value-like macro binding that isn't constant should not be a static readonly field, it should be a static readonly property

[Happypig375]

This macro (source)

#define B3_HUGE ( 1.0e9f * b3GetLengthUnitsPerMeter() )

generates

    [NativeTypeName("#define B3_HUGE ( 1.0e5f * b3GetLengthUnitsPerMeter() )")]
    public static readonly float B3_HUGE = (1.0e5f * b3GetLengthUnitsPerMeter());

but b3GetLengthUnitsPerMeter() can change during runtime.