c++ - MySQL C++连接器: undefined reference to `get_driver_instance'

我一直在尝试使MySQL连接器正常工作，同时安装了连接器和mysql客户端库，但仍然出现此错误:

obj/Database.obj: In function `Database::connect()':
/home/xeross/alpine/src/server/Database.cpp:13: undefined reference to `get_driver_instance'
collect2: ld returned 1 exit status
make[2]: *** [alpine-server] Error 1
make[1]: *** [.build-conf] Error 2
make: *** [.build-impl] Error 2

使用Ubuntu 10.04
我的makefile如下:

INCLUDES = -I./src -I./src/shared
OUTDIR = bin
INTDIR = obj
OPTIONS = -ggdb -g3 -Wall -O0

alpine-server : Shared.a AsyncServerSocket.obj PlayerHandler.obj PacketHandler.obj     Session.obj User.obj Database.obj init
    g++ $(INCLUDES) $(OPTIONS) -static \
    -pthread \
    -lmysqlcppconn-static \
            -o $(OUTDIR)/alpine-server src/server/main.cpp \
        $(INTDIR)/AsyncServerSocket.obj \
        $(INTDIR)/PacketHandler.obj \
        $(INTDIR)/Database.obj \
        $(INTDIR)/PlayerHandler.obj \
        $(INTDIR)/Session.obj \
        $(INTDIR)/User.obj \
        $(INTDIR)/Shared.a \
        -lboost_system \
        -lmysqlclient


AsyncServerSocket.obj : src/server/AsyncServerSocket.cpp init
g++ -c $(INCLUDES) $(OPTIONS) -o $(INTDIR)/AsyncServerSocket.obj src/server/AsyncServerSocket.cpp

PlayerHandler.obj : src/server/PlayerHandler.cpp init
g++ -c $(INCLUDES) $(OPTIONS) -o $(INTDIR)/PlayerHandler.obj src/server/PlayerHandler.cpp

PacketHandler.obj : src/server/PacketHandler.cpp init
g++ -c $(INCLUDES) $(OPTIONS) -o $(INTDIR)/PacketHandler.obj src/server/PacketHandler.cpp

Session.obj : src/server/Session.cpp init
    g++ -c $(INCLUDES) $(OPTIONS) -o $(INTDIR)/Session.obj src/server/Session.cpp

User.obj : src/server/User.cpp init
    g++ -c $(INCLUDES) $(OPTIONS) -o $(INTDIR)/User.obj src/server/User.cpp

Database.obj : src/server/Database.cpp init
    g++ -c $(INCLUDES) $(OPTIONS) -o $(INTDIR)/Database.obj src/server/Database.cpp

# Shared.a
Shared.a : Packet.obj Flags.obj AsyncSocket.obj Log.obj init
    ar -cvq $(INTDIR)/Shared.a \
        $(INTDIR)/Packet.obj \
        $(INTDIR)/Flags.obj \
        $(INTDIR)/AsyncSocket.obj \
        $(INTDIR)/Log.obj
    ranlib $(INTDIR)/Shared.a

Packet.obj : src/shared/packet.cpp init
    g++ -c $(INCLUDES) $(OPTIONS) -o $(INTDIR)/Packet.obj src/shared/packet.cpp

Flags.obj : src/shared/Flags.cpp init
    g++ -c $(INCLUDES) $(OPTIONS) -o $(INTDIR)/Flags.obj src/shared/Flags.cpp

AsyncSocket.obj : src/shared/AsyncSocket.cpp init
g++ -c $(INCLUDES) $(OPTIONS) -o $(INTDIR)/AsyncSocket.obj src/shared/AsyncSocket.cpp

Log.obj : src/shared/Log.cpp init
    g++ -c $(INCLUDES) $(OPTIONS) -o $(INTDIR)/Log.obj src/shared/Log.cpp

init:
    mkdir -p bin obj

clean:
    rm -f $(INTDIR)/*.obj $(INTDIR)/*.a

代码

// Excerpt from .hpp file
#include <cppconn/driver.h>
#include <cppconn/connection.h>
#include <cppconn/resultset.h>
#include <cppconn/statement.h>
// End excerpt

void Database::connect()
{
    std::stringstream connString;
    connString << "tcp://";
    connString << m_host;
    connString << ":";
    connString << m_port;

    m_driver = get_driver_instance(); // This guy is being a *****
    m_conn = m_driver->connect(connString.str(), m_user, m_password);
    m_conn->setSchema(m_database);
}

我该怎么做才能解决此问题？

最佳答案

最终，我可以在Ubuntu 10.10中成功编译具有C++连接器的程序。

最初，我遇到了“ undefined reference `get_driver_instance'的相同问题，以解决此问题，我声明了MySQL_Driver类型的驱动程序实例变量。为便于引用，此类型在mysql_driver.h文件中定义。这是我在程序中使用的代码段。

sql::mysql::MySQL_Driver *driver;
try {
    driver = sql::mysql::get_driver_instance();
}

我用-l mysqlcppconn链接器选项编译了程序