[RFC DTC PATCH] dtc: add symlink (-L) output to dtbs

[Jason Cooper]

On Tue, Nov 12, 2013 at 08:40:09PM +0100, Andrew Lunn wrote:
> > 2) right now: distributions are creating utilities, such a flash-kernel
> > in Debian, that pick from a slew of dtbs, append it to the zImage, and
> > create the uImage.  The bootloaders in these installs don't have support
> > for fdt.
> > 
> > Our problem (as I see it) is that #2 is creating an ABI out of something
> > we never realized would become an ABI, the filenames created by 'make
> > dtbs'.
> 
> Well, flash-kernel could be taught how to parse .dtb files to get the
> compatibility strings out of them, rather than use filenames.
> 
> It might still be early enough to give distributions some guidelines
> about what DT folks consider ABI and what is not. How they should find
> a fitting .dtb file and how they should not.

True, but this isn't a 'search /boot/config-X for CONFIG_Y so we can
configure for Z' *cough* *grub* *cough*.  flash-kernel currently doesn't
have any more correct way to select dtbs than by filename.

It's normal to look for arch/<arch>/boot/zImage after a build.  Module
names are not 1-1 with object files or source files, they are unique,
and static.  Our failure was not providing a similar ABI for the dtbs.
imho, we messed up, so we should fix it.

thx,

Jason.