#include <stdio.h> extern int __thread xx1; extern int __thread xx2; extern int __thread xxa[]; int __thread a[10] = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 }; extern int xxyy(); int main(int argc, char** argv) { printf("xx1=%d, xx2=%d, xxa[5]=%d, a[5]=%d, xxyy()=%d\n", xx1, xx2, xxa[5], a[5], xxyy()); }