[U-Boot] Makefile: Update minimum dtc version to 1.4.3

[Heinrich Schuchardt]

On 09/23/2017 07:53 PM, Tom Rini wrote:
> On Sat, Sep 23, 2017 at 07:43:09PM +0200, Marek Vasut wrote:
>> On 09/23/2017 07:37 PM, Tom Rini wrote:
>>> On Sat, Sep 23, 2017 at 07:33:44PM +0200, Marek Vasut wrote:
>>>> On 09/23/2017 07:05 PM, Tom Rini wrote:
>>>>> On Sat, Sep 23, 2017 at 08:56:08AM -0400, Tom Rini wrote:
>>>>>> On Sat, Sep 23, 2017 at 12:39:44PM +0200, Marek Vasut wrote:
>>>>>>> On 09/22/2017 04:20 PM, Tom Rini wrote:
>>>>>>>> On Fri, Sep 15, 2017 at 01:15:25PM -0400, Tom Rini wrote:
>>>>>>>>
>>>>>>>>> With support for overlays and calling the -@ flag to dtc we need to have
>>>>>>>>> at least 1.4.3 available now.
>>>>>>>>>
>>>>>>>>> Cc: Simon Glass <sjg at chromium.org>
>>>>>>>>> Reported-by: Stephen Warren <swarren at wwwdotorg.org>
>>>>>>>>> Signed-off-by: Tom Rini <trini at konsulko.com>
>>>>>>>>
>>>>>>>> Applied to u-boot/master, thanks!
>>>>>>>
>>>>>>> Debian still only has 1.4.2 even in unstable, so u-boot/master no longer
>>>>>>> builds on any debian system.
>>>>>>
>>>>>> Then perhaps we need to mirror the kernel and provide / build dtc, but
>>>>>> allow for people to override it.
>>>>>
>>>>> This isn't too hard and I'm pushing that through Jenkins now to confirm
>>>>> I've got all the logic correct.  I think this will be the least error
>>>>> prone method long term.
>>>>
>>>> NAK, this is the same thing which chromium does and what Debian is
>>>> trying to stop -- vendoring. We will end up with patched custom DTC out
>>>> of sync with upstream.
>>>
>>> Shrug, it's what Linux does, and what QEMU does, and probably what other
>>> projects do as well since apparently even Debian/Unstable is 2 releases
>>> and nearly a year behind (or, 9 months if you don't want to exaggerate).
>>
>> And it will likely stay that way for debian stable. I am really
>> disappointed in the "Shrug" reaction to such massive breakage.
> 
> Nope and nor will it catch old-stable breaking in January when gcc-6.x
> or newer is required.
> 

Above you have been discussing code duplication. This is not the right
way to work with git.

The git way is to add
https://git.kernel.org/pub/scm/utils/dtc/dtc.git
as git submodule (https://git-scm.com/docs/git-submodule).

In our make file we can then use git submodule init, git submodule
update, git verify-tag before we build a dtc with the appropriate version.

This way we can build dtc from sources but stay in sync with the upstream.

Regards

Heinrich