gcc -g -o client test.o -L/usr/local/lib/mysql -lmysqlclient -lsocket -lnsl Undefined first referenced symbol in file floor /usr/local/lib/mysql/libmysqlclient.a(password.o) ld: fatal: Symbol referencing errors. No output written to client
如果在你的系统上出现了该情况，必须在编译/链接行的末尾增加“-lm”，通过该方式包含数学库。