Fix build, and also make protocol a bit more consistent and flexible (only in docs though, to be implemented)
#include <check.h>
#include <stdlib.h>
#include "check_check.h"
int main(void)
{
int number_failed;
Suite *s1 = system_suite();
Suite *s2 = misc_suite();
Suite *s3 = sysutils_suite();
Suite *s4 = fileio_suite();
SRunner *sr = srunner_create(s1);
srunner_add_suite(sr, s2);
srunner_add_suite(sr, s3);
srunner_add_suite(sr, s4);
srunner_run_all(sr, CK_NORMAL);
number_failed = srunner_ntests_failed(sr);
srunner_free(sr);
return (number_failed == 0) ? EXIT_SUCCESS : EXIT_FAILURE;
}