Need help in installing tcl8.4 in free bsd 7.1

[syenumula]

I am getting the below error while installing the tcl 8.4 in freebsd version 7.1

TCL_SHLIB_EXT=\".so\" /home/spirent/tcl8.4.20/unix/../unix/tclAppInit.c
gcc -O -pipe -DTCL_DBGX= tclAppInit.o -L/home/spirent/tcl8.4.20/unix -ltcl84 -lm -Wl,-rpath,/usr/bin/lib -o tclsh
/usr/bin/ld: cannot find -ltcl84
*** Error code 1

Please help it's a little bit urgent .

Regards,
-Syenumula