environment: Slackware 12.1 upgraded via slackpkg with all updates

config: ./configure '--prefix=/usr' '--with-logfilebase=/usr/var' 
'--libdir=/usr/lib' '--with-configdir=/etc/samba'  
'--with-lockdir=/usr/var/locks' '--with-piddir=/usr/var/locks' 
'--with-privatedir=/usr/private' '--with-cifsumount'

Compile error:

Compiling client/client.c
Compiling client/clitar.c
Compiling client/dnsbrowse.c
Compiling lib/readline.c
Compiling ../libcli/security/display_sec.c
Linking bin/smbclient
/usr/lib/gcc/i486-slackware-linux/4.2.3/../../../libreadline.so: undefined reference to `PC'
/usr/lib/gcc/i486-slackware-linux/4.2.3/../../../libreadline.so: undefined reference to `tgetflag'
/usr/lib/gcc/i486-slackware-linux/4.2.3/../../../libreadline.so: undefined reference to `tgetent'
/usr/lib/gcc/i486-slackware-linux/4.2.3/../../../libreadline.so: undefined reference to `UP'
/usr/lib/gcc/i486-slackware-linux/4.2.3/../../../libreadline.so: undefined reference to `tputs'
/usr/lib/gcc/i486-slackware-linux/4.2.3/../../../libreadline.so: undefined reference to `tgoto'
/usr/lib/gcc/i486-slackware-linux/4.2.3/../../../libreadline.so: undefined reference to `tgetnum'
/usr/lib/gcc/i486-slackware-linux/4.2.3/../../../libreadline.so: undefined reference to `BC'
/usr/lib/gcc/i486-slackware-linux/4.2.3/../../../libreadline.so: undefined reference to `tgetstr'
collect2: ld returned 1 exit status
make: *** [bin/smbclient] Error 1