[jira] [Commented] (MESOS-898) Introduce CMake as an alternative build system.

["haosdent (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/MESOS-898?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14597899#comment-14597899 ] 

haosdent commented on MESOS-898:
--------------------------------

LLVM and KDE move to cmake several years ago. In fact, I try to use [am2cmake|http://www.cmake.org/Wiki/CMake#automake.2Fautotools.2Fautoconf] to convert current automake files one month ago. But the convert result is ugly, I think it's better to convert manually.

I think the largest advantage to use CMake is: CMake could help you [generate IDE project files|http://www.cmake.org/cmake/help/v3.0/manual/cmake-generators.7.html].
After add CMake support, we just need execute {code}cmake -G "Your IDE name"{code} IDE name could be visual studio, xcode, CodeBlocks, Eclipse, CodeLite, QtCreator or other support IDE here. And then it could be imported by you ide.

> Introduce CMake as an alternative build system.
> -----------------------------------------------
>
>                 Key: MESOS-898
>                 URL: https://issues.apache.org/jira/browse/MESOS-898
>             Project: Mesos
>          Issue Type: Epic
>          Components: build
>            Reporter: Timothy St. Clair
>            Assignee: Alex Clemmer
>              Labels: build
>
> This is a rather substantial undertaking, so I would want upstream debate+buy-in prior to full commitment.  The basic premise is: upstream rebundles several of its dependencies in part to tightly control its stack.  This is not out of the norm, but in order to be picked up by distribution channels it needs to built against system dependencies, and rebundling is strictly forbidden.  Given that the mesos primary target platform are data-center distributions such as RHEL/CENTOS/SL it makes sense to still have bundling support for those who do not have dependencies in their channels "yet".  This is where cmake can be win with it's uber macros (http://www.cmake.org/cmake/help/v2.8.8/cmake.html#module:ExternalProject).  I do not know of any equivalent in the autotools world, other then to brew your own solution.   I've done this type of work in the past, and completely transformed condor and would leverage a lot of the work that was done there. 
> I currently have a tracking branch where I've started this work, but before I go off into the woods, it makes sense to have a debate in public. 
> The primary benefits are: 
> 1. Enable downstream channels to easily distro without carrying a large patch sets. 
> 2. Still support existing "non-proper" distribution methods. 
> 3. Harden / future proof dependent interfaces. 
> Side Benefits: 
> Audit current build mechanics.  
>  - Presently the language specific binding are not installed.  (.py & .jar)
>  - make -jX currently fails 
>  - optionally look in arm support. 
> Costs:
> 1. Time
> 2. Potential temporary destabilization
> 3. Infrastructure around build+test may need to change.



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