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