PROPOSAL: Use Cmake as the build system for Samba

[Jelmer Vernooij]

Hi Simo,

On Thu, 2010-02-18 at 08:39 -0500, simo wrote:
> On Thu, 2010-02-18 at 17:44 +1100, tridge at samba.org wrote:
> > I had an interesting discussion with Brad Hards today, who has some
> > experience with the conversion of KDE to cmake.
> > 
> > Brad's overall impression of cmake is very positive. It has worked
> > very well for KDE.
> > 
> > The interesting thing is that the problem I raised with cmake versions
> > and fixes has happened with KDE, but for KDE it isn't a major
> > problem. For Samba I think it might be a much bigger problem.
> > 
> > Every now and again KDE switches version of cmake. Everyone who
> > develops KDE then needs to build and install the new version of
> > cmake. For KDE, that means just the developers, as end-users building
> > their own version of KDE is extremely unusual (unless its via a system
> > like the one in Gentoo). It is also basically unheard of for someone
> > to try and build the current version of KDE for something like RHEL3.
> > 
> > For Samba it's quite different. It isn't just the Samba developers who
> > build and install Samba, it's also anyone who wants Samba on their
> > system and their OS doesn't have the latest version. That means many
> > of our end users will have to build and install the right version of
> > cmake, and when we switch versions then they will also have to
> > switch. It gets even harder when people have ancient Linux or Unix
> > versions. Yes, cmake may build on Irix, but does it build on all the
> > older versions of Irix? What about old versions of RHEL or SLES?
> 
> Well for sure anything based on a modern version of python will never
> let you build Samba on old versions of RHEL.
> 
> RHEL3 has python 2.2
> RHEL4 has python 2.3
> 
> Certainly rebuilding the whole of python is never going to fly. And at
> the same time I am certain we are not going to have the time or
> resources to keep something python-based to build on anything older than
> a few years. And I am not even considering modules ...
Why is building python from source "not going to fly" ? It's just a
matter of: 

wget http://python.org/ftp/python/2.6.4/Python-2.6.4.tar.bz2
cd Python-2.6.4
./configure && make && make install

There are no prerequisites other than libc.

Cheers,

Jelmer
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