MySQL C ++连接器:未定义的引用`get_driver_instance' [英] MySQL C++ Connector: undefined reference to `get_driver_instance'
问题描述
我一直在努力让MySQL连接器工作我已经安装了连接器和mysql客户端库,但我仍然得到这个错误:
I've been trying to get the MySQL connector working I've installed both the connector and the mysql client library but I am still getting this error:
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:
Using Ubuntu 10.04 And my makefile is as follows:
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
$ b b
代码
The Code
// 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);
}
我可以如何解决这个问题?
What can I do to fix this ?
推荐答案
最后,我可以成功地编译一个程序与C ++连接器在Ubuntu 10.10。
Finally I could successfully compile a program with C++ connector in Ubuntu 10.10.
最初,我遇到了与未定义的引用`get_driver_instance'相同的问题来解决这个问题我声明我的驱动程序实例变量MySQL_Driver类型。为了准备参考,此类型在mysql_driver.h文件中定义。这里是我在我的程序中使用的代码片段。
Initially I faced the same problem with "undefined reference to `get_driver_instance' " to solve this I declare my driver instance variable of MySQL_Driver type. For ready reference this type is defined in mysql_driver.h file. Here is the code snippet I used in my program.
sql::mysql::MySQL_Driver *driver;
try {
driver = sql::mysql::get_driver_instance();
}
我使用-l mysqlcppconn链接器选项编译程序
and I compiled the program with -l mysqlcppconn linker option
这篇关于MySQL C ++连接器:未定义的引用`get_driver_instance'的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!