On Fri, 2021-06-04 at 08:13 +0000, David Laight wrote:
> From: Alex Elder
> > Sent: 03 June 2021 22:55
> ...
> > Not necessarily, sizeof(bool) is implementation defined.
> > And I thought you didn't think the size of the structure
> > was very important...
>
> It is 'implementation defined' but will be 32 bits on everything
> except an old 32bit ARM ABI.
Really? (x86-64)
$ gcc -x c -
#include <stdio.h>
#include <stdlib.h>
struct foo {
_Bool b;
};
int main(int argc, char **argv)
{
printf("sizeof _Bool: %zu\n", sizeof(_Bool));
printf("sizeof struct foo: %zu\n", sizeof(struct foo));
return 0;
}
$ ./a.out
sizeof _Bool: 1
sizeof struct foo: 1
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