[En-Nut-Discussion] log10f not suportet?

[Kim Madsen]

Is the math.h not surported.
I got error from the linker.
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 float logEx,dew_point;
 logEx=0.66077+7.5*t/(237.3+t)+(log10(h)-2);
 dew_point = (logEx - 0.66077)*237.3/(0.66077+7.5-logEx);
 return dew_point;

the error is at log10