Hello everyone: 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. how to fix it? or it is can not be fixed? thank you