mp_power
const struct mp_power *powers = &_fpioconst_pow10[explog + 1];
const struct mp_power *powers = &_fpioconst_pow10[explog + 1];
const struct mp_power _fpioconst_pow10[LDBL_MAX_10_EXP_LOG + 1] =
extern const struct mp_power _fpioconst_pow10[LDBL_MAX_10_EXP_LOG + 1];
const struct mp_power *ttab = &_fpioconst_pow10[0];
const struct mp_power *ttab = &_fpioconst_pow10[0];