For you guys that can't get it to work. Open up the script and find this line below. Edit Accordingly. I don't have my c drive mounted in cygwin so i just deleted the /cygdrive/c/progra~1/ portion of path. I just created a folder named TivoGcc in cygwin folder and ran the script from there.

export PREFIX=/cygdrive/c/progra~1/TivoGcc