Using mysql in c programming - mysql

Question

I installed ubuntu on a virtual machine. There, I installed mysql server sudo apt-get install mysql-server .This worked, because I could acces mysql-u root -p password
After that, I did : sudo apt-get install libmysqlclient-dev
#include <my_global.h>
#include <mysql.h>
int main(int argc, char **argv)
{
printf("MySQL client version: %s\n", mysql_get_client_info());
exit(0);
}
When I compile this with
gcc version.c -o version `mysql_config --cflags --libs`
it works.
But when I compile this one from below
gcc createdb.c -o createdb -std=c99 `mysql_config --cflags --libs`
I get some errors.
#include <my_global.h>
#include <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", "root", "root_pswd",
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);
}
Errors:
"Usage:: No such file or directory
[OPTIONS]: No such file or directory
Options:: No such file or directory
[-I/usr/include/mysql: No such file or directory
[-L/user/lib/x86_64-linux-gnu: No such file or directory
.
.
.
unrecognized command line option '--cflags'
unrecognized command line option '--libs'
.
.
unrecognized command line option '--socket'
unrecognized command line option '--port' "
Can someone explain me what I did wrong,and how to fix it?
I just want to get some data from tables in a C program.

Answer 1

I suspect you actually ran
gcc createdb.c -o createdb -std=c99 `mysql_config` --cflags --libs
rather than
gcc createdb.c -o createdb -std=c99 `mysql_config --cflags --libs`
That’s not going to work; mysql_config, if it doesn’t get any arguments, is going to print out a bunch of usage instructions, which will be passed to gcc, and then you’ll follow that with --cflags --libs, which gcc also doesn’t understand. gcc is severely confused and complains.
If you make sure those arguments get to mysql_config rather than gcc, everyone will be happy.