Re: aligned-malloc, rmdir-errno: Sanitize configuration test result

[Paul Eggert]

On 2023-06-14 23:46, Bruno Haible wrote:
> -              fprintf (fp, "%u\n", (unsigned int) (((bits ^ (bits - 1)) + 1) 
> >> 1));
> +              fprintf (fp, "%u", (unsigned int) (((bits ^ (bits - 1)) + 1) >> 
> 1));

This sort of change relies on undefined behavior in POSIX. In the POSIX 
shell, a command like A=$(B) requires B to output text, and a nonempty 
text file must end in a newline.

To avoid this issue the program could use 'fopen (..., "wb")'.

We could just leave things alone, as I don't know of any POSIXish 
systems that would mishandle files lacking trailing newlines in this 
situation. However, the "wb" approach" is a bit cleaner.