mingw-w64-crt/math/log10f.c

/**
 * This file has no copyright assigned and is placed in the Public Domain.
 * This file is part of the mingw-w64 runtime package.
 * No warranty is given; refer to the file DISCLAIMER.PD within this package.
 */
#include <math.h>

float log10f(float _X)
{
  return ((float)log10((double)_X));
}