FTW Will not compile in Unix

Hello,
I know this is the linux thread but its the closest matching I could find.

I am writing a program on a SCO OpenServer 5.07 machine.

Problem is that even if I create a program that does nothing with ftw.h included the program failes to compile due to the following errors:
__p __f and __d are not declared

and some other parse errors inside of ftw.h

my main program looks like this

Code:

#include<ftw.h>
int main()
{
return 0;
}

I compile it with this syntax

g++ test.cpp

If anyone knows what the problem is it would be much appreciated...Thanks

nm I found the solution,

On UnixWare I had to decleare _EFTSAFE which I do not know what it means and why it needs declared