I also received this error during compile with the 679 release.
Code:
clientlist.cpp:229: error: sort was not declared in this scope
clientlist.cpp:231: error: unique was not declared in this scope
clientlist.cpp: In member function void Client::SendChannelMessage(std::string):
clientlist.cpp:1284: warning: suggest explicit braces to avoid ambiguous else
clientlist.cpp: In member function void Client::ChannelModerate(std::string):
clientlist.cpp:1797: warning: suggest explicit braces to avoid ambiguous else
make[1]: *** [clientlist.o] Error 1
make[1]: Leaving directory `/home/eqemu/source/trunk/EQEmuServer/ucs'
make: *** [all] Error 2