[Numpy-discussion] [numscons] Would having two mandatory scons script per package be acceptable ?

[Robert Kern]

On Thu, Jun 12, 2008 at 00:08, David Cournapeau
<david at ar.media.kyoto-u.ac.jp> wrote:
> Robert Kern wrote:
>>
>> Can you give me a longer story? What are the three lines? Why are they
>> necessary in a separate, boilerplate file?
>
> Sure: scons builds everything from the sources in the source directory,
> and build everything in the build directory.  By default, both
> directories are the same as the directory where the scons script is.
>
> Now, this is of course unacceptable to use with distutils, and scons has
> this notion of build directory to change this: depending on where the
> scons script is called in the tree, I change the source and build
> directories accordingly. But for this to work, you have to change how to
> refer to source and targets in builders (scons objects to build things
> like object code and libraries). Again, unacceptable, so I did remove
> most of those in the scons scripts using severals 'tricks' in numscons.
> But the more I did those tricks, the more I realized it was fragile, and
> could break in obscure cases.
>
> The recommended way to do it in scons is to use a second scons script:
> http://www.scons.org/wiki/UnderstandingBuildDir. The 'problem' is also
> linked to the fact that instead of building everything with one scons
> project, I have one scons project per package (because that's how
> distutils worked, in particular, and for other reasons I can develop if
> you want). I asked about doing the same thing as scons does without two
> files, but this seems difficult (I was told it is 'magic').
>
> http://scons.tigris.org/servlets/ReadMsg?list=users&msgNo=13642

Works for me.

-- 
Robert Kern

"I have come to believe that the whole world is an enigma, a harmless
enigma that is made terrible by our own mad attempt to interpret it as
though it had an underlying truth."
 -- Umberto Eco