pidgin-2.5.9 cannot find -lsilcclient

[x11r6 at go2.pl]

How to fix an error listed below?

make[5]: Entering directory 
`/tmp/src/pidgin-2.5.9/libpurple/protocols/silc'
/bin/sh ../../../libtool --silent --tag=CC   
--mode=link /usr/bin/ccache /usr/bin/gcc  -g -O2 -march=i686 -mcpu=i686 
-pipe -fomit-frame-pointer -module -avoid-version -L/usr/lib -o 
libsilcpurple.la -rpath /usr/lib/purple-2 libsilcpurple_la-buddy.lo 
libsilcpurple_la-chat.lo libsilcpurple_la-ft.lo libsilcpurple_la-ops.lo 
libsilcpurple_la-pk.lo libsilcpurple_la-silc.lo libsilcpurple_la-util.lo 
libsilcpurple_la-wb.lo -Wl,--export-dynamic -pthread -lgobject-2.0 
-lgmodule-2.0 -ldl -lgthread-2.0 -lglib-2.0   -L/usr/local/lib 
-lsilcclient -lsilc -ldl -lpthread   -lutil -lpthread -lnsl -lresolv
/usr/lib/gcc-lib/i486-slackware-linux/3.3.6/../../../../i486-slackware-linux/bin/ld: 
cannot find -lsilcclient
collect2: ld returned 1 exit status
make[5]: *** [libsilcpurple.la] Error 1
make[5]: Leaving directory 
`/tmp/src/pidgin-2.5.9/libpurple/protocols/silc'
make[4]: *** [all-recursive] Error 1
make[4]: Leaving directory `/tmp/src/pidgin-2.5.9/libpurple/protocols'
make[3]: *** [all-recursive] Error 1
make[3]: Leaving directory `/tmp/src/pidgin-2.5.9/libpurple'
make[2]: *** [all] Error 2
make[2]: Leaving directory `/tmp/src/pidgin-2.5.9/libpurple'
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory `/tmp/src/pidgin-2.5.9'
make: *** [all] Error 2