powl
long double powl(long double, long double);
r = powl(absa, x);
__weak_alias(powl, pow);
__weak_alias(powl,_powl)
powl(long double b, long double e)
long double x_pow13 = powl(x[i], 1.0L / 3.0L);
long double x_pow12 = powl(x[i], 1.0 / 2.0);
long double oob = powl(2.0L,