Re: cmake

[Loic Dachary <loic@dachary.org>]

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Hi,

On 16/12/2015 18:33, Sage Weil wrote:
> The work to transition to cmake has stalled somewhat.  I've tried to use 
> it a few times but keep running into issues that make it unusable for me.  
> Not having make check is a big one, but I think the hackery required to 
> get that going points to the underlying problem(s).
> 
> I seems like the main problem is that automake puts all build targets in 
> src/ and cmake spreads them all over build/*.  This makes that you can't 
> just add ./ to anything that would normally be in your path (or, 
> PATH=.:$PATH, and then run, say, ../qa/workunits/cephtool/test.sh).  
> There's a bunch of kludges in vstart.sh to make it work that I think 
> mostly point to this issue (and the .libs things).  Is there simply an 
> option we can give cmake to make it put built binaries directly in build/?
> 
> Stepping back a bit, it seems like the goals should be
> 
> 1. Be able to completely replace autotools.  I don't fancy maintaining 
> both in parallel.
> 
> 2. Be able to run vstart etc from the build dir.
> 
> 3. Be able to run ./ceph[-anything] from the build dir, or put the build 
> dir in the path.  (I suppose we could rely in a make install step, but 
> that seems like more hassle... hopefully it's not neceesary?)
> 
> 4. make check has to work
> 
> 5. Use make-dist.sh to generate a release tarball (not make dist)
> 
> 6. gitbuilders use make-dist.sh and cmake to build packages
> 
> 7. release process uses make-dist.sh and cmake to build a relelase
> 
> I'm probably missing something?
> 
> Should we set a target of doing the 10.0.2 or .3 with cmake?

An intermediate step could be to switch from using make check to using make distcheck. Once this works, all issues related to out-of-tree build and make check will be resolved. And deprecating autotools in favor of cmake will be just about that.

My 2cts

> 
> sage
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-- 
Loïc Dachary, Artisan Logiciel Libre


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