The code: 
use Inline C => <<'END_C';
void print_2() {
    fprintf(stdout, "2\n");
}
END_C

print STDOUT "1";
print_2();
print STDOUT "\n";

[download]

prints:

2
1

[download]

It says, that perl has its own system of stream buffering.

In reply to Re: Flush all opened STDIO streams by dmitnin
in thread Flush all opened STDIO streams by dmitnin

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