[llvm-dev] [cfe-dev] Fwd: Raising CMake minimum version to 3.4.3

[Rowan, Jim via llvm-dev]

+1
On May 3, 2016, at 2:29 PM, Chris Bieneman via llvm-dev <llvm-dev at lists.llvm.org> wrote:

> Renato,
> 
> This approach sounds great to me.
> 
> Chris M let me know separately that GreenDragon is on CMake 3.5.
> 
> I belive Galina and Takumi maintain the largest chunk of remaining public bots. Do either of you have any thoughts on this?
> 
> Thanks,
> -Chris
> 
>> On May 3, 2016, at 11:19 AM, Renato Golin <renato.golin at linaro.org> wrote:
>> 
>> On 3 May 2016 at 17:07, Chris Bieneman via cfe-dev
>> <cfe-dev at lists.llvm.org> wrote:
>>> Since there seems to be no strong objections remaining I’d like to propose the following timeline and process:
>>> 
>>> 4/23 - I will send another follow-up email reminding everyone of this change and timeline
>>> 4/30 - I will send a final notice an hour before making the change to the LLVM, Clang, Compiler-RT, Clang-Tools-Extra, LibCXX, LibCXXABI and Test-Suite repos
>>> 
>>> During the week of 4/30 I will revert as necessary if bots fail. Hopefully having the change permanently landed by the middle of the week.
>>> 
>>> Does this sound agreeable to everyone?
>> 
>> I'd like to propose a different approach. How about we do this the
>> other way around? Maybe we should try the "move first, fix later",
>> than the "break first, despair later".
>> 
>> This week we (Linaro) have finished our buildbot migration, all of
>> them running on CMake 3.4.3. I'd like to see if other bot maintainers
>> could take the same effort before a certain date.
>> 
>> So, we can still have the same dates (in May, of course), but with
>> different "labels":
>> 
>> Soon, you send an announcement:
>> * Saying the consensus is to move to CMake 3.4.3 as well as a
>> compiled CMake for all platforms,
>> * That the technical reason is strong enough to do so, even if it
>> incurs more work to some people,
>> * That *ALL* bot owners should migrate as soon as possible (no later
>> than 30th).
>> 
>> On 23rd, you send a reminder to the list informing all bot owners that
>> time is running out.
>> * If they can't do it, who could help them
>> * If they need push in the CMake community, or a new stable release,
>> it's better to have it now than then
>> 
>> On 30th, you do the migration as you proposed.
>> 
>> It's all the same, but with the difference that we're involving all
>> bot owners, and hopefully not having to revert too many times such a
>> troublesome change (CMake changes always mess up the bots anyway).
>> 
>> Anyway, for ARM/AArch64, we're good to go.
>> 
>> cheers,
>> --renato
> 
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Jim Rowan
jmr at codeaurora.org
Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by the Linux Foundation