[LLVMdev] [RFC] Raise minimum required CMake version to 3.0

[Chris Bieneman]

It was a user on Debian wheezy that reverted my patch to update to 2.8.12.2.

-Chris

> On Mar 10, 2015, at 3:31 PM, Benjamin Kramer <benny.kra at gmail.com> wrote:
> 
> 
>> On 10.03.2015, at 22:59, Chris Bieneman <beanz at apple.com> wrote:
>> 
>> 
>>> On Mar 10, 2015, at 2:53 PM, Renato Golin <renato.golin at linaro.org> wrote:
>>> 
>>> On 10 March 2015 at 21:30, Chandler Carruth <chandlerc at google.com> wrote:
>>>> In the absence of specific features which would make our use of CMake
>>>> significantly better, I'm inclined to stick roughly to the version of CMake
>>>> in the latest LTS release of ubuntu (I don't know the stable releases of
>>>> debian well enough to cite it, but likely the same applies).
>>> 
>>> 2.8.12.2 seems to be the common minimum version.
>> 
>> Not if you include Debian stable, which is 2.8.9.
> 
> I don't think Debian wheezy should be an important target for us now. It looks like the next stable version 'jessie' is coming out in April and comes with CMake 3.0.2. That gives people enough time to upgrade in time for LLVM 3.7 :)
> 
> - Ben
> 
>> 
>>> 
>>> Another thing to consider is the impact of CMake changes on buildbots.
>>> It may not be possible to migrate all buildbots to newer versions, for
>>> instance, Ubuntu is still stuck with 2.8.12.2 I think, but Debian
>>> Jesse is already on 3.0.2 and Arch Linux on 3.1.3.
>>> 
>>> The "advanced" features I want from CMake are:
>>> * use pool = console (available in 3.0) to get rid of our ugly hack
>>> due to short timeouts
>>> * specify -DCMAKE_NINJA_LINK_POOL=2 so we can build on
>>> multi-core/low-mem environments (or distcc).
>>> 
>>> I don't think the second is even on the drawing board, though I
>>> remember having suggested it a few years back.
>>> 
>>> None of them would make the life of a new developer easier, though... :)
>> 
>> Unless we have new developers who enjoy cross compilation.
>> 
>>> 
>>> cheers,
>>> --renato
>> 
>> 
>> _______________________________________________
>> LLVM Developers mailing list
>> LLVMdev at cs.uiuc.edu         http://llvm.cs.uiuc.edu
>> http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev
>