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

[Chris Bieneman]

> 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.

> 
> 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