[Buildroot] [PATCH 11/12] grub2: prepare and install El Torito image

[Yann E. MORIN <yann.morin.1998@free.fr>]

Thomas, All,

On 2015-06-06 02:57 +0200, Thomas Petazzoni spake thusly:
> On Sat, 6 Jun 2015 01:09:11 +0200, Yann E. MORIN wrote:
> 
> > > diff --git a/boot/grub2/grub2.mk b/boot/grub2/grub2.mk
> > > index 697f0ad..dd04bb3 100644
> > > --- a/boot/grub2/grub2.mk
> > > +++ b/boot/grub2/grub2.mk
> > > @@ -76,6 +76,8 @@ define GRUB2_IMAGE_INSTALLATION
> > >  		-p "$(GRUB2_PREFIX)" \
> > >  		$(if $(GRUB2_BUILTIN_CONFIG),-c $(GRUB2_BUILTIN_CONFIG)) \
> > >  		$(GRUB2_BUILTIN_MODULES)
> > > +	cat $(HOST_DIR)/usr/lib/grub/$(GRUB2_TUPLE)/cdboot.img \
> > > +		$(GRUB2_IMAGE) > $(HOST_DIR)/usr/lib/grub/$(GRUB2_TUPLE)/grub-eltorito.img
> > 
> > In retrospect, I think you should install that in $(BINARIES_DIR), like
> > is done for $(GRUB2_IMAGE), not in $(HOST_DIR).
> 
> Well, I had a reason to install it in HOST_DIR rather than
> BINARIES_DIR. Since I'm producing this image unconditionally, even if
> the user is not interested in ISO9660, I didn't want to clutter
> BINARIES_DIR with this file, which would appear as soon as the user
> enables grub2. So I preferred to install it together with all the other
> "internal" Grub images in HOST_DIR, and pick it up from there in the
> iso9660.mk logic.
> 
> Now, if you think cluttering BINARIES_DIR with this file only useful
> for ISO booting as soon as Grub 2 is enabled is fine, then I'll happily
> change it.

Well, yes, I'd prefer that's what we do, for these reasons:

  - first, that file is really small,

  - second, we already do that for other bootloaders (like
    rpi-firmware),

  - finally, we never said we only installed only the strictly
    minimum set of files,

  - if the user really does not want it, there's still the
    post-build scripts to remove that extra file.

> Thanks for the review!

My pleasure! :-)

Regards,
Yann E. MORIN.

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