[U-Boot] [PATCH] arm: Make gcc 6.0 or later a hard requirement now.

[Peter Robinson]

On Tue, Dec 5, 2017 at 6:53 AM, Heiko Schocher <hs at denx.de> wrote:
> Hello Tom,
>
> Am 04.12.2017 um 20:09 schrieb Tom Rini:
>>
>> On Mon, Dec 04, 2017 at 12:02:20PM -0700, Stephen Warren wrote:
>>>
>>> On 12/02/2017 06:12 PM, Tom Rini wrote:
>>>>
>>>> Move the warning to an error as we have been promising would happen in
>>>> this release.
>>>
>>>
>>> Oh. This has broken my U-Boot build/test system. I guess it's entirely my
>>> fault for interpreting the "2018.01" warning as "you'll need to fix this
>>> in
>>> Jan 2018", not "you'll need to fix this as soon as development starts for
>>> 2018.01":-(
>>
>>
>> I'm tagging v2018.01-rc1 later today, so I think this is about the time
>> to enforce the warning.
>>
>>> Is there a reason for requiring such an extremely new gcc, as opposed to
>>> simply something not ancient? For example, no LTS version of Ubuntu
>>> packages
>>> a compiler that's new enough to build U-Boot now:-(
>>
>>
>> There's always the Free Electrons toolchains, as well as Linaro.  And
>> yes, we've been having size problems and having to play various games to
>
>
> Yes, I have the AT91 based smartweb board, for which the SPL have to fit
> into 4k sram (is in my weekly tbot builds).
>
>> allow for older gcc versions to still fit things in.  GCC-6 is where
>> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=54303 was resolved and we
>> get a lot of space saved, and a number of platforms simply won't work
>> with older.
>
>
> Just looked at:
>
> http://toolchains.free-electrons.com/
>
> for example the stable toolchains for arm are gcc 5.4.0 based.
>
> Ok, there is the "bleeding-edge" ... gcc 7.2.0 based...
>
> Hmm.. linaro has 7.2.0 in its latest release ... so, currently only
> linaro toolchain can be used for compiling U-Boot ?

I've been using gcc 7.x in Fedora since the beginning of the year to
build u-boot