wget: command not found error

["Chang M. Kang via Gcc-help" <gcc-help@xxxxxxxxxxx>]

I encountered the following error message trying to build gcc.

EBT@EBT_MCNP /cygdrive/d/gcc/gcc-4.8.5
$ ./contrib/download_prerequisites
./contrib/download_prerequisites: line 26: wget: command not found

CM Kang
---------------------------------
Script of /contrib/download_prerequisites

MPFR=mpfr-2.4.2
GMP=gmp-4.3.2
MPC=mpc-0.8.1

line26: wget ftp://gcc.gnu.org/pub/gcc/infrastructure/$MPFR.tar.bz2 || exit
1