experimental::filesystem linker error

I try to use the new c++1z features actually on the head of development within gcc 6.0.

If I try this little example:

#include <iostream>#include <experimental/filesystem>namespace fs = std::experimental::filesystem;int main(){    fs::path p1 = "/home/pete/checkit";    std::cout << "p1 = "<< p1 << std::endl;}

I got:

/opt/linux-gnu_6-20151011/bin/g++ --std=c++1z main.cpp -O2 -g -o go/tmp/ccaGzqFO.o: In function \`std::experimental::filesystem::v1::__cxx11::path::path(char const (&) [36])':/opt/linux-gnu_6-20151011/include/c++/6.0.0/experimental/bits/fs_path.h:167: undefined reference to `std::experimental::filesystem::v1::__cxx11::path::_M_split_cmpts()'collect2: error: ld returned 1 exit status

gcc version is the snapshot linux-gnu_6-20151011

Any hints how to link for the new c++1z features?