On Fri, 4 Nov 2016 19:02:48 -0400, Rick Christian wrote:

 RC> doesn't seem like that option is supported by "make" per man file:

 RC> -b, -m
 RC>             These options are ignored for compatibility with other
 RC> versions of make.


 RC> So this is changed where??

It is not a make option.  It is a compiler option.

After you add it, wiill want to do a make cleanunix then make unix

---