Re: Bug on sizeof(void) == 1, must be undefined or negative, == -100000.

[Andrew Pinski <pinskia at physics dot uc dot edu>]

On Jun 17, 2005, at 4:33 PM, jc-nospam@jr-pizarro.jazztel.es wrote:

> Please, to run this script of 5 lines:
>
> #!/bin/sh
> cat > bug_void.c <<EOF
> int main() { printf("sizeof(void) = %d\n",sizeof(void)); return 0; }

This is invalid code and a GNU extension to take the sizeof(void).  The 
reason
why GCC defines it as 1 is because you can do the following:
void *a;
a++;

If you want to error out on GNU extensions, use -pedantic-errors.

Thanks,
Andrew Pinski