undefined reference for some functions (no replies)

Dear friends,

The following functios are declared in the mysql.h header file that is well included in the example source code. And it´s path well seted.

But the compiler says:

undefined reference to 'mysql_real_connect'
undefined reference to 'mysql_query'
undefined reference to 'mysql_store_result'
undefined reference to 'mysql_num_rows'
undefined reference to 'mysql_fetch_row'
undefined reference to 'mysql_close'

Could you helpe me please?

Thanks in advance.