How to connect to Mariadb using C language in Windows 10? - c

Question

Windows version - 10
gcc version - 6.3.0
MariaDB version - 10.9
Also, I have installed the c\c++ extension in visual code.
I am using Visual Code to run the below C code but facing the error maybe they are a problem with the linker. I am not sure what I am doing wrong.
#include <stdlib.h>
#include <windows.h>
#include "C:\Program Files\MariaDB 10.9\include\mysql\server\mysql.h"
int main(int argc, char** argv)
{
MYSQL* con = mysql_init(NULL);
if (con == NULL)
{
fprintf(stderr, "%s\n", mysql_error(con));
exit(1);
}
if (mysql_real_connect(con, "localhost", "USERNAME", "PASSWD",
NULL, 0, NULL, 0) == NULL)
{
fprintf(stderr, "%s\n", mysql_error(con));
mysql_close(con);
exit(1);
}
if (mysql_query(con, "CREATE DATABASE testdb"))
{
fprintf(stderr, "%s\n", mysql_error(con));
mysql_close(con);
exit(1);
}
mysql_close(con);
exit(0);
}
Command
gcc .\mysqlcon.c -o mysqlcon -L"C:\Program Files\MariaDB 10.9\lib\" -l"libmariadb.lib"
Error
PS C:\Users\Pan\Desktop\Mysqlcon> gcc .\mysqlcon.c -o mysqlcon -L"C:\Program Files\MariaDB 10.9\lib\" -l"libmariadb.lib"
C:\Users\Pan\AppData\Local\Temp\ccYX5KZT.o:mysqlcon.c:(.text+0x1e): undefined reference to `mysql_init#4'
C:\Users\Pan\AppData\Local\Temp\ccYX5KZT.o:mysqlcon.c:(.text+0x35): undefined reference to `mysql_error#4'
C:\Users\Pan\AppData\Local\Temp\ccYX5KZT.o:mysqlcon.c:(.text+0xa3): undefined reference to `mysql_real_connect#32'
C:\Users\Pan\AppData\Local\Temp\ccYX5KZT.o:mysqlcon.c:(.text+0xb5): undefined reference to `mysql_error#4'
C:\Users\Pan\AppData\Local\Temp\ccYX5KZT.o:mysqlcon.c:(.text+0xdf): undefined reference to `mysql_close#4'
C:\Users\Pan\AppData\Local\Temp\ccYX5KZT.o:mysqlcon.c:(.text+0x101): undefined reference to `mysql_query#8'
C:\Users\Pan\AppData\Local\Temp\ccYX5KZT.o:mysqlcon.c:(.text+0x113): undefined reference to `mysql_error#4'
C:\Users\Pan\AppData\Local\Temp\ccYX5KZT.o:mysqlcon.c:(.text+0x13d): undefined reference to `mysql_close#4'
C:\Users\Pan\AppData\Local\Temp\ccYX5KZT.o:mysqlcon.c:(.text+0x157): undefined reference to `mysql_close#4'
collect2.exe: error: ld returned 1 exit status

Answer 1

Include file:
#include "C:\Program Files\MariaDB 10.9\include\mysql\server\mysql.h"
This should generate a compilation error, since by default the MSI installer installs mysql.h in directory C:\Program Files\MariaDB 10.9\include\mysql.
Preferable you should include only mysql.h and specify the include directory instead.
Client library
The libraries shipped with MariaDB Server (and MariaDB Connector/C) are intended to use with VisualStudio compiler, not for MinGW.
If you want to build with msys/gcc, you have to install the MariaDB client libraries via pacman.