[CentOS] Cannot find Tcl library(Sort of OT)

> I ran this:
> 
> ./configure --with-tcl-libs=/usr/lib --with-tcl-inc=/usr/include 
> --with-tcl-lib-name=tcl.h
 
 None of these options are probably required. Test it.

> configure:2805: checking for tcl.h library
> configure:2815: gcc -o conftest    conftest.c   -lSM -lICE  -lX11 -lXi 
> -lXext -lXmu -lXt   -ldl -lm -L/usr/lib -ltcl.h 1>&5
> /usr/bin/ld: cannot find -lXmu

 You need to install libXmu and libXmu-devel.