I am trying to build a MySQL C++ connector application with Visual Studio 15 2017, using MySQL C++ connector as a static library. However, after carefully following the directions given at https://dev.mysql.com/doc/connector-cpp/en/connector-cpp-apps-windows-visual-studio.html, I get the LNK2001 error "unresolved external symbol _get_driver_instance".
The above pictures show the required library settings and other settings I set according to the above link.
The code I am trying to build is:
/* Standard C++ includes */
#include <stdlib.h>
#include <iostream>
/*
Include directly the different
headers from cppconn/ and mysql_driver.h + mysql_util.h
(and mysql_connection.h). This will reduce your build time!
*/
#include "mysql_connection.h"
#include <cppconn/driver.h>
#include <cppconn/exception.h>
#include <cppconn/resultset.h>
#include <cppconn/statement.h>
using namespace std;
int main(void)
{
try {
sql::Driver *driver;
sql::Connection *con;
sql::Statement *stmt;
sql::ResultSet *res;
/* Create a connection */
driver = get_driver_instance();
con = driver->connect("tcp://127.0.0.1:3306", "root", "root");
/* Connect to the MySQL test database */
con->setSchema("test");
stmt = con->createStatement();
res = stmt->executeQuery("SELECT 'Hello World!' AS _message");
while (res->next()) {
cout << "\t... MySQL replies: ";
/* Access column data by alias or column name */
cout << res->getString("_message") << endl;
cout << "\t... MySQL says it again: ";
/* Access column data by numeric offset, 1 is the first column */
cout << res->getString(1) << endl;
}
delete res;
delete stmt;
delete con;
}
catch (sql::SQLException &e) {
cout << "# ERR: SQLException in " << __FILE__;
cout << "(" << __FUNCTION__ << ") on line "
<< __LINE__ << endl;
cout << "# ERR: " << e.what();
cout << " (MySQL error code: " << e.getErrorCode();
cout << ", SQLState: " << e.getSQLState() << " )" << endl;
}
cout << endl;
return EXIT_SUCCESS;
}
which is from the MySQL example scripts.
Some things I have tried to fix the problem:
- Change the project platform from Win32 to x64 and solution platform from x86 to x64 (Caused error LNK2038 "mismatch detected for '_MSC_VER': value '1800' doesn't match value '1900'")
- Type full path name for library
- Build connector/C++ from source (did not work, but not sure if I did it correctly).
I have read most other posts on this topic but the solutions don't seem to work. Is there a solution for Windows?
