OSX prompt limit

[Adam D. Ruppe via Digitalmars-d-learn]

On Tuesday, 8 September 2015 at 06:24:12 UTC, Joel wrote:
> arsd/terminal.d(1268): Error: undefined identifier 'SIGWINCH'


There's a missing value in the signal header for OSX !

Could you run this little C program for me on your Mac and let me 
know the output?

---
#include<stdio.h>
#include<signal.h>

int main() {
	printf("%d\n", SIGWINCH);
}
---


I can't find the numeric value online either and I don't have a 
mac myself to check the headers :( ugh.