1 #include <stdio.h> 2 main(void)3 int main(void) { 4 const char *fn = DEPFILE; 5 FILE *f = fopen(fn, "r"); 6 if (!f) { 7 printf("could not open %s", fn); 8 return 1; 9 } 10 else { 11 printf("successfully opened %s", fn); 12 } 13 14 return 0; 15 } 16