Samba 4 build system (was: Re: Samba3 build farm can't execute smbtorture4 anymore)

[Jelmer Vernooij]

Am Mittwoch, den 26.12.2007, 14:30 +0100 schrieb Jelmer Vernooij:
> > But while I can use our build system, the closest I've got to working on
> > it is the auto-generation of .mk files from the asn.1 sources. 
> > 
> > > The build system looks like a good example of Not-Invented-Here.
> > > However, about a year ago, I did an inquiry into the various
> > > alternatives that were available at the time and didn't come up with
> > > anything better. Most alternatives either require installing another
> > > application and are too big to include in Samba or don't care about
> > > working on platforms like AIX, Solaris, etc.
> > Has this changed now that Python is a reasonable dependency to require?
> > (Given the move to python for our internal scripting)
> I quite liked scons (written in Python) and it'd probably be small
> enough to include. It's not perfect, but easy to understand, portable
> and flexible. 
> 
> One of the advantages of scons is also that it also uses checksums
> rather than just timestamps to determine whether a file is out-of-date.
> That means it should be possible to support automatic dependencies and
> parallel builds because changing a prototype header doesn't cause
> everything to be rebuilt if you didn't change any function signatures.
> 
> The main two problems with scons when I looked at it back then were the
> fact it was written in Python and the speed. The first would no longer
> be a problem. The second has improved, but I'm not sure if it's improved
> enough. 
> 
> So that's certainly something to have a look at again as well. I wonder
> though whether we shouldn't go back to something we know works before we
> consider switching to something experimental again. OTOH, it would be a
> waste of effort to switch build systems twice in a short period of time.
I looked into SCons a bit more again and tried to convert
tdb/talloc/ldb. That was quite easy, and intuitive. However, propagating
paths and flags is still not easy and it also doesn't support sonames
out of the box. 

Cheers,

Jelmer
-- 
Jelmer Vernooij <jelmer at samba.org> - http://samba.org/~jelmer/
Jabber: jelmer at jabber.fsfe.org
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