compiler can't tell int from function? nmh-1.0.4

[Dieter]

> > ../h/prototypes.h:73: warning: function declaration isn't a prototype
> > context_read.c:12: warning: function declaration isn't a prototype
> >=20
>       09  #include <errno.h>
> >     10  #include <pwd.h>
> >     11
> >     12  extern int errno;    <-- doesn't look like a function to me?
> 
> See errno(2), errno is redefined like this
> #define errno           (* __error())
> in /usr/include/errno.h

Oh!  Someone changed errno from an int to a function, breaking massive
amounts of code.  Bizzare.

Anyway, commenting out line 12 fixed the warning.

Thank you.