Installing blt2.4f on Red Hat 6.2

Has anyone installed blt2.4f on Red Hat Linux. I downloaded the
tcl_tk_blt.tar.gz and installed tcl and tk (had to edit tclPosixStr.c to get
the first two installed using build_tcltk.sh). The install gave out when it
hit blt error looked something like this:

> make[1]: Leaving directory `/usr/temp/blt2.1/src'
> making BLT demo "bltwish"...
> rm -f bltwish
> gcc -O3 -fno-strength-reduce -Wwrite-strings -Wshadow -Wtraditional
> -fwritable-strings -Wall -I. -I/usr/include/tcl -I/usr/include/tcl
> -I/usr/X11R6/include
> -Wl,-rpath,/usr/local/blt/lib:/usr/lib:/usr/lib:/usr/X11R6/lib \
> ./tkAppInit.c -o bltwish ./src/libBLT.a -L/usr/X11R6/lib -lX11 -ldl
> -lm
> ./tkAppInit.c:29 warning: 'rcsid' defined but not used
> ld: cannot open -ldl: No such file or directory
> make: *** [bltwish] Error 1


I tried to edit tkAppInit.c to change according to some listserve, but it
seem the scripts are different.

Any suggestions?