On Apr 27 2022, Andrea Monaco via Gcc wrote:
> This program
>
> #include <ctype.h>
>
> int main ()
> {
> char *s;
> isspace (s);
> }
>
> compiles with no warning in gcc 8.3.0, even though there's a type
> mistake; the correct call would be isspace (*s).
Try -Wsystem-headers.
> The ctype functions are implemented as macros in glibc, so you can't
> have type checking. But they are also provided as builtins by gcc, so I
> wonder why type checking is not performed in that case, either.
You need to suppress the macro to get the builtin.
--
Andreas Schwab, [email protected]
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