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.