Re: [PATCH 12/12] efi: make const array 'apple' static

[Ingo Molnar <mingo@kernel.org>]

* Ard Biesheuvel <ard.biesheuvel@linaro.org> wrote:

> > Also, would it make sense to rename it to something more descriptive like
> > "apple_unicode_str[]" or so?
> >
> > Plus an unicode string literal initializer would be pretty descriptive as well,
> > instead of the weird looking character array, i.e. something like:
> >
> >   static efi_char16_t const apple_unicode_str[] = u"Apple";
> >
> > ... or so?
> >
> 
> is u"xxx" the same as L"xxx"?

So "L" literals map to wchar_t, which wide character type is implementation 
specific IIRC, could be 16-bit or 32-bit wide.

u"" literals OTOH are specified by the C11 spec to be char16_t, i.e. 16-bit wide 
characters - which I assume is the EFI type as well?

> In any case, this is for historical reasons: at some point (and I
> don't remember the exact details) we had a conflict at link time with
> objects using 4 byte wchar_t, so we started using this notation to be
> independent of the size of wchar_t. That issue no longer exists so we
> should be able to get rid of this.

Yes, my guess is that those problems were due to L"xyz" mapping to wchar_t and 
having a different type in the kernel build and the host build side - but u"xyz" 
should solve that.

Thanks,

	Ingo