my_global.h:560: warning: function declaration isn’t a prototype

[Nulik Nol]

Hi,
I always get a warning '/usr/include/mysql/my_global.h:560: warning: function declaration isn’t a prototype' when I compile code with mysql library. How can I get rid of it?

The gcc command is this:

gcc -ggdb -Wmissing-prototypes -Wmissing-declarations -Wbad-function-cast -Wunused -Winline -Wno-format -Wstrict-prototypes -Wimplicit-function-declaration -I/usr/include/mysql -I./ -L/usr/lib/mysql -L/usr/local/lib -c agent.c
In file included from agent.c:1:
/usr/include/mysql/my_global.h:560: warning: function declaration isn’t a prototype
agent.c: In function ‘main’:

My .c file uses this headers (in this order):
#include <my_global.h>
#include <mysql.h>


Will appriciate any suggestions
Regards