I am trying to follow the instructions listed above for installing HTK.   I am using a 32-bit system.  I get as far as running

$./configure --prefix=/home/yourusername/bin/htk-3.4

But when I try to run make all, I get about 800 errors. At the top of the list of errors, my terminal says,

"HGraf.c:73:77: error: X11/Xlib.h: No such file or directory
HGraf.c:74:23: error: X11/Xutil.h: No such file or directory
HGraf.c:75:21: error: X11/Xos.h: No such file or directory
HGraf.c:77:27: error: X11/keysymdef.h: No such file or directory"

and then it has several lines of stuff looking like,

"HGraf.c:87: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘*’ token"

 Does anyone know what's going on here/how I can fix this?

By the way, I coculd not find a module to make my version of GCC compatible with 3.4.  Instead, I simply downloaded GCC 3.4 and edited the Makefile so that it would run GCC 3.4 instead of my new version of GCC.

Thanks!