curses编程问题

Question

#include <stdio.h>;
#include <curses.h>;
#include <unistd.h>;

int main(void)
{
        struct termios termold;
        tcgetattr(0,&termold);
}
在redhat下编译报"storage size of `termold' isn't known"的错,这是为什么?
谢谢