[installation on cygwin] copy_n undeclared in namespace `std'

Hi All,

I tried to compile gnucap on cygwin (I downloaded
the latest version.)

I am getting the following message at compilation time:

g++ -DUNIX -O2 -DNDEBUG -I.. -I. -fno-exceptions -W -c ../m_matrix.cc
../m_matrix.cc: In member function `BSMATRIX<T>& BSMATRIX<T>::fbsub(T*, const
   T*, T*) [with T = double]':
../m_matrix.cc:438:   instantiated from here
../m_matrix.cc:410: error: `copy_n' undeclared in namespace `std'
../m_matrix.cc: In member function `BSMATRIX<T>& BSMATRIX<T>::fbsub(T*, const
   T*, T*) [with T = COMPLEX]':
../m_matrix.cc:439:   instantiated from here
../m_matrix.cc:410: error: `copy_n' undeclared in namespace `std'
make[1]: *** [m_matrix.o] Error 1

Where is copy_n defined?

Thanks,

Laurent Lemaitre
Motorola - Geneva