Re: PPC detected as little endian (!)

Thanks Mat=EDas,

I've changed the test in svn.

Gerd

Am 27.09.2012 00:25:55 schrieb(en) Mat=EDas Giovannini:
> Hello,
> =

> after seeing ocamlnet 3.6 fail spectacularly on a Power Mac, I tried
> recompiling and watching closely the configuration options. Lo and  =

> behold,
> configure proudly proclaims:
> =

> Checking endianess... little
> =

> which is of course completely wrong. The problem is that pointer  =

> aliasing
> via unions is undefined behavior in C (barring packing pragmas and  =

> other
> compiler wizardry), and GCC/LLVM do whatever they want with that  =

> code. I've
> found that I can distinguish endianness reliably with the following  =

> check:
> =

> value check(value d) {
>   int i =3D 1;
>   char *s =3D (char*) &i;
>   return (s[0] =3D=3D 0 ? Val_true : Val_false);
> }
> =

> Regards,
> Mat=EDas.
> =


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