1#if defined(__linux__) || defined(__MINT__) 2# define _GNU_SOURCE /* strcasestr() */ 3#endif 4 5#include <string.h> 6 7int 8main(void) 9{ 10 const char *big = "BigString"; 11 char *cp = strcasestr(big, "Gst"); 12 return cp != big + 2; 13} 14