I want to install emacs on a cluster. The OS is turbo Linux. but they say :

[siap@ganode002 emacs-21.3]$ ./configure --prefix=/home/user/siap/emacs
loading cache ./config.cache
checking host system type... x86_64-unknown-linux-gnu
configure: error: Emacs hasn't been ported to `x86_64-unknown-linux-gnu' systems
.
Check `etc/MACHINES' for recognized configuration names.