[Numpy-discussion] Waf or scons/numscons for a C/Fortran/Cython/Python project -- what's your recommendation?

josef.pktd at gmail.com josef.pktd at gmail.com
Sat Jan 16 18:36:02 EST 2010

On Sat, Jan 16, 2010 at 4:43 PM, Dag Sverre Seljebotn
<dagss at student.matnat.uio.no> wrote:
> Kurt Smith wrote:
>> On Sat, Jan 16, 2010 at 2:38 PM, Dag Sverre Seljebotn
>> <dagss at student.matnat.uio.no> wrote:
>>> Not that I really know anything about it, but note that one of the
>>> purposes of David's toydist is to handle the install stage independently
>>> of the build system used. That is, it is able to create e.g. Python eggs
>>> without using setuptools.
>>> The thing is, installing Python software is something of a mess, and
>>> every system would want this done differently (making an Ubuntu package,
>>> creating a DMG, or creating a Python egg are all different things). So I
>>> think it makes sense to decouple this from the build in the tools that
>>> are used.
>> Yep.  Good points.  I expect once I get the configure/build stages in
>> a working state, I'll have most of what people need.  The install
>> stage is less crucial, at least for the first version.  Seems like
>> people would like the system to just create a .so file in the current
>> directory, and leave it at that.  If I can get that working on all
>> platforms I'll be very happy :-)
>>> Of course, toydist is beta, and I dare say you have enough beta
>>> dependencies for fwrap already :-)
>> :-)
>> Hopefully that can be remedied that in the coming months, at least
>> from the fparser and memoryview-support-in-Cython side of things.
> Obviously I didn't get around to that yet...
> As for the build systems, some things to consider (I have no clue myself
> as to waf vs. scons):
>  - There's already primitive scons support for Cython, but I'm sure it
> wouldn't be hard to add to waf
>  - Whatever you pick is likely to become the best supported build system
> for Cython code in the future, I think, due to our interest in working on it
>  - Does waf have infrastructure for parsing files and finding
> dependencies? I know that in Scons one can plug in a "Cython parser",
> which checks the dependencies (which pxds are used, basically), so that
> pyx files are rebuilt automatically when pxds they depend on change. I'm
> sure waf supports something similar, if not I'd say it disqualifies it.
> My own hunch is that waf looks better, but scons has a larger mind share
> and Cython support right now in scientific Python, and that both must be
> supported eventually, so why not do scons first... *shrug*
> But like you I'm anxious to hear from more non-Cython devs as well on
> this matter.
> Dag Sverre
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>From a very brief look at the waf book, I don't really understand what
the cross-platform capabilities of waf are

http://freehackers.org/~tnagy/wafbook/single.html :
"Installing Waf on a system is unnecessary and discouraged: "

"Operating systems: Waf cannot be installed on Windows (yet)"


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