I wrote about it in Bug 359329 Comment 2 which was "fixed" incorrectly but nobody took care of it. net-im/pidgin has the following dependency on net-libs/libgadu: gadu? ( || ( >=net-libs/libgadu-1.10.1[ssl,gnutls] <net-libs/libgadu-1.10.1[-ssl] ) ) ...so if you have new libgadu, you _have_ to set USE="ssl gnutls" for it. But Pidgin will compile and work just good with >=net-libs/libgadu-1.10.1[-ssl] (I tested it). So I suggest changing the dep like that: gadu? ( || ( >=net-libs/libgadu-1.10.1[ssl,gnutls] net-libs/libgadu[-ssl] ) )
Bartosz, sorry, sometimes comments in closed bugs get lost and this time I just forgot about this. Thank you for report! Fixed.