Mysql with C++ error: undefined reference to mysql_init

问题

#include <stdlib.h>
#include <mysql.h>

#include <my_global.h>


int main (int argc, char *argv[])
{

MYSQL *conn;
MYSQL_RES *res;
MYSQL_ROW row;

char *server = "127.0.0.1";
char *user = "root";
char *password = "1386";
char *database = "OurDB";

conn = mysql_init(NULL);

/* Connect to database */
if (!mysql_real_connect(conn, server,user, password, database, 0, NULL, 0))
{
    fprintf(stderr, "%s\n", mysql_error(conn));
    exit(0);
}

  return 0;
}

and i get linker error in codeblocks:

undefined reference to mysql_init

I used mysql_config --libs in linker option and mysql_config --cflags in compiler option.

I read somewhere i should add some libraries like libmysql.lib, but i cannot find this file on my PC (I am using Ubuntu 11.04 64bit).

回答1:

This is for Linux environments only:

In "Project build options" > "Linker settings" Tab > Under "Other linker options" add -lmysqlclient

You will also need to add mysql-connector-c-6.1.3-linux-glibc2.5-x86_64/include/ in "Search directories" > "Compiler"

You will also need to add mysql-connector-c-6.1.3-linux-glibc2.5-x86_64/lib/ in "Search directories" > "Linker"

For windows:

-lmysql

MySQL Connector library can be found here: http://dev.mysql.com/downloads/connector/c/

回答2:

compile your app with the command bellow

gcc -o test  -L/usr/lib/mysql -lmysqlclient test.c

回答3:

Setting -> Compiler and debugger -> Search directories -> Linker then Add and insert /usr/lib/mysql/

来源：https://stackoverflow.com/questions/9645844/mysql-with-c-error-undefined-reference-to-mysql-init

标签

c++

mysql

codeblocks