Re: Variant tests failing on big endian machines

[Rafael dos Santos <rdossant redhat com>]

----- Original Message -----
> From: "Torsten Schoenfeld" <kaffeetisch gmx de>
> To: gtk-perl-list gnome org
> Sent: Friday, 26 June, 2015 3:34:48 PM
> Subject: Re: Variant tests failing on big endian machines
> > I found the culprit. On the GVariant.xs file, we have:
> >
> > const char * g_variant_classify (GVariant *value);
> >     PREINIT:
> >         GVariantClass vclass;
> >     CODE:
> >         vclass = g_variant_classify (value);
> >         RETVAL = (const char *) &vclass;
> >     OUTPUT:
> >         RETVAL
> >
> > The RETVAL value will be arch-dependent because of the way it's accessed.
> > I'm not familiar with .xs syntax, so what's the way to deal with
> > endianness on this type of files?
>
> Does this work?
>
> const char * g_variant_classify (GVariant *value);
>     PREINIT:
>         GVariantClass vclass;
>     CODE:
>         vclass = g_variant_classify (value);
>         RETVAL = (const char *) &((char) vclass);

GVariant.xs: In function ‘XS_Glib__Variant_classify’:
GVariant.xs:285:26: error: lvalue required as unary ‘&’ operand
  RETVAL = (const char *) &((char) vclass);
                          ^
Makefile:468: recipe for target 'GVariant.o' failed
make: *** [GVariant.o] Error 1

Unfortunately, casting it to char makes it an rvalue which doesn't have an address.

Is it possible to include <endian.h> and then make a conditional 

#if BYTE_ORDER == BIG_ENDIAN ?


Att
--
Rafael Fonseca