T
13. März 2021, 18:21
I used Visual Studio 2019 to program c ++ to a Linux server. I would like to use the library mysqlConnector. I compensate under
Project properties -> Configuration properties -> VC ++ directories -> Include directories
my path belongs to the folder with the header belonging. In my case this is: /home/system/mysqlConnector/include/jdbc
Then I have under
Project Properties -> Configurations-Properties -> VC ++ Directories -> Library Properties
my path belongs to the .so file. In my case this is: /home/system/mysqlConnector/lib64
In the end I have under
Project Properties -> Configurations-Properties -> Linker -> Settings -> Library Permissions
heard the name of the library. In my case this is mysqlcppconn.
To test that I look at source code:
#include <cstdio>
#include <stdlib.h>
#include <iostream>
#include <mysql_connection.h>
#include <cppconn/driver.h>
#include <cppconn/exception.h>
#include <cppconn/resultset.h>
#include <cppconn/statement.h>
int main()
{
std::cout << "Test" << std::endl;
try {
sql::Driver* driver;
sql::Connection* con;
sql::Statement* stmt;
//Create a connection
driver = get_driver_instance();
con = driver->connect("tcp://192.168.178.57:3306", "root", "test");
///Connect to the MySQL test database
con->setSchema("test");
stmt = con->createStatement();
std::cout << "connected" << std::endl;
sql::ResultSet* res(stmt->executeQuery("SELECT * FROM Test.t"));
std::cout << "getAnswer" << std::endl;
while (res->next()) {
std::cout << res->getString(1) << std::endl;
}
delete res;
delete stmt;
delete con;
}
catch (sql::SQLException& e) {
std::cout << "# ERR: SQLException in " << __FILE__;
std::cout << "(" << __FUNCTION__ << ") on line "
<< __LINE__ << std::endl;
std::cout << "# ERR: " << e.what();
std::cout << " (MySQL error code: " << e.getErrorCode();
std::cout << ", SQLState: " << e.getSQLState() << " )" << std::endl;
}
std::cout << std::endl;
while (true);
return EXIT_SUCCESS;
}
When I compile the project now, there are error messages every time:
/home/system/projects/mysqlTest1/obj/x64/Debug/main.o: in function `check_lib()': mysqlTest1 D:\usr\bin\ld line 1
ld returned 1 exit status mysqlTest1 D:\Tamino\Freizeit\Entwicklung\visual Studio\Workspaces\Tests\mysqlTest1\mysqlTest1\collect2 line 1
undefined reference to `check(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)' mysqlTest1 D:\home\system\mysqlConnector\include\jdbc\cppconn\driver.h line 77
/home/system/mysqlConnector/include/jdbc/cppconn/driver.h:78: undefined reference to `check(std::map<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::less<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<std::pair<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > > > const&)' mysqlTest1 D:\usr\bin\ld line 1
Here it is also clearly recognizable that the /home and /usr pathes come from Linux and D:/ comes from Windows.
Can someone tell me what was I doing wrong?
