At first, thx a lot for your interest...
But:
user@host:~/.../eggdrop1.6.9$ set LD_LIBRARY_PATH=/..../lib/libtcl8.3.so
user@host:~/.../eggdrop1.6.9$ echo $LD_LIBRARY_PATH
/.../lib/libtcl8.3.so
user@host:~/.../lib/eggdrop1.6.9$ make
(....)
Linking eggdrop...
gcc -pipe -o ../eggdrop bg.o botcmd.o botmsg.o botnet.o chanprog.o cmds.o dcc.o dccutil.o dns.o flags.o language.o main.o mem.o misc.o misc_file.o modules.o net.o rfc1459.o tcl.o tcldcc.o tclhash.o tclmisc.o tcluser.o userent.o userrec.o users.o -L/.../lib/lib -ltcl8.3 -lm -ldl -lnsl md5/md5c.o compat/*.o `cat mod/mod.xlibs`
strip ../eggdrop
Successful compile: eggdrop
./eggdrop: error while loading shared libraries: libtcl8.3.so: cannot open shared object file: No such file or directory
:(