xstr, mkstr

[Warner Losh]

> "As far as I can tell" needs to be a bit stronger,
>
> Agreed. But before doing work we should first make sure that the work
> will be productive.
>

Xstr and most are best thought of as a final pass of the old pcc compiler.
This functionality moved into gcc before the egcs split back in the 90s.
The compiler has done this work for two decades now. Nobody uses it, or
needs it today.

Unlike tip or cu, nobody at all uses these.

Warner

>