question on installing gtk+

[June Hill <junehill ee uwa edu au>]

Dear gtk,
I wish to install gtk on RedHat 7.3.  I downloaded the gtk+-1.2.10-15
tar file and extracted it then ran configure. After a while I got the
following message:

checking for X... no
configure: error:
*** X libraries or include files not found. Check 'config.log' for
*** more details.

here are the last few lines of the config.log:

configure: In function `main':
configure:4683: warning: implicit declaration of function `XtMalloc'
/usr/bin/ld: cannot find -lXt
collect2: ld returned 1 exit status
configure: failed program was:
#line 4680 "configure"
#include "confdefs.h"

int main() {
XtMalloc()
; return 0; }


Can you advise me?
thank you,
June