Possible spurious warning for isdigit() under sparc-sun-solaris2.5.1 and egcs 110597?

[Daniel Eisenbud <eisenbud at cs dot swarthmore dot edu>]

The following macro in <ctype.h> (both in /usr/include, and egcs's fixed
version):

#define isdigit(c)      ((__ctype + 1)[c] & _N)   

makes egcs -Wall emit a warning that the subscript is a char every time
isdigit is used on a char.  First of all, perhaps this is a bug, not a
feature.  But it seems like making Wall warn on every use of ischar,
isdigit, etc, is bad.  Maybe fixincludes should add a cast?  (Excuse me
if this has already been discussed - I have been following the list, but
sometimes intermittently.

-Daniel Eisenbud

-- 
Daniel Eisenbud
eisenbud@cs.swarthmore.edu