PCC compiled `main()` not returning zero when no return statement is given

[fuhsnn]

#include <stdio.h>

int main(void) {
  printf("hello\n");
} // program expected to exit with 0, got 6 instead (printf's return val?)

This is required since (I think) C99.

[ragge0]

Interesting! I have never encountered this, but as you write, C99 5.1.2.2.3 states that "reaching the } that terminates the
main function returns a value of 0.".