Fail compilation with FFTW3 library with g++-6.4.0 under cygwin - c++11

Question

I have the following code from sigpack website
#include "sigpack.h"
using namespace arma;
using namespace sp;
int main()
{
int N = 45191; // Large prime number
FFTW ss(N,FFTW_ESTIMATE);
vec x(N);
cx_vec Sxx(N);
vec P(N);
clock_t tic;
for (int n = 1; n < 5; n++)
{
x.randn();
tic = clock();
Sxx = ss.fft(x);
cout << "FFTW Loop[" << n << "]. Time = " << (clock() - tic)/
double(CLOCKS_PER_SEC) << endl;
x.randn();
tic = clock();
Sxx = fft(x);
cout << " FFT Loop[" << n << "]. Time = " << (clock() - tic) /
double(CLOCKS_PER_SEC) << endl;
}
return 0;
}
I save it as exFFT1
when i build the file under cygwin with g++-6.4.0with command :
g++ -Wall -std=gnu++11 -I/home/budiarjo/sigpack-1.2.4/sigpack/ -I/usr/local/include/ -I/opt/OpenBLAS/include/ -L/opt/OpenBLAS/lib/ -L/usr/local/lib/ -DHAVE_FFTW -lblas -llapack -Dunix exFFT1.cpp -lfftw3 -o exFFT1
The following are the error messages :
/tmp/ccRsp1Bf.o:exFFT1.cpp:(.text.startup+0x1cc): undefined reference to `__emutls_v._ZN4arma23arma_rng_cxx11_instanceE'
/tmp/ccRsp1Bf.o:exFFT1.cpp:(.text.startup+0x242): undefined reference to `__emutls_v._ZN4arma23arma_rng_cxx11_instanceE'
/tmp/ccRsp1Bf.o:exFFT1.cpp:(.text.startup+0x6db): undefined reference to `__emutls_v._ZN4arma23arma_rng_cxx11_instanceE'
/tmp/ccRsp1Bf.o:exFFT1.cpp:(.text.startup+0x752): undefined reference to `__emutls_v._ZN4arma23arma_rng_cxx11_instanceE'
/tmp/ccRsp1Bf.o:exFFT1.cpp:(.text.startup+0x1662): undefined reference to `__emutls_v._ZN4arma23arma_rng_cxx11_instanceE'
/tmp/ccRsp1Bf.o:exFFT1.cpp:(.text.startup+0x16f9): more undefined references to `__emutls_v._ZN4arma23arma_rng_cxx11_instanceE' follow
collect2: error: ld returned 1 exit status
But in Raspberry Pi with g++-4.8, when i build the file with the command
sudo g++ -Wall -std=gnu++11 -I/home/pi/sigpack-1.2.4/sigpack/ -I/opt/OpenBLAS/include/ -L/opt/OpenBLAS/lib/ -DHAVE_FFTW -lopenblas -llapack -Dunix exFFT1.cpp -lfftw3 -o exFFT1
I could build successfully without any error messages.
What could be wrong with my cygwin setting?
Should I replace the g++-6.4.0 in cygwin with g++-4.80? How to downgrade it, since if I compile and do make, the g++-4.80 package, I would get error messages as well because of the usge of gcc/g++-6.40 during the process.