Re: [PATCH] Fix error: array subscript has type 'char'

[Jan Beulich <jbeulich@xxxxxxxx>]

On 12.01.2021 19:12, Manuel Bouyer wrote:
> From: Manuel Bouyer <bouyer@xxxxxxxxxx>
> 
> Use unsigned char variable, or cast to (unsigned char), for
> tolower()/islower() and friends. Fix compiler error
> array subscript has type 'char' [-Werror=char-subscripts]

Isn't this something that wants changing in your ctype.h instead?
the functions (or macros), as per the C standard, ought to accept
plain char aiui, and if they use the input as an array subscript,
it should be their implementation suitably converting type first.

Jan