std::cbrt not a member of std

[kas1e]

Topic says it all. Test case:

#include <iostream>
#include <cmath>
#include <limits>

int main()
{
    // normal use
    std::cout << "cbrt(729) = " << std::cbrt(729) << '\n'
}

[kas1e]

from newlib's side everything about "not a member of std::" was fixed in the new beta of newlib 53.69 and adtools recompiled with new newlib's headers.