[cctbxbb] forcing building boost_python early in SConscript

[Nicholas Devenish]

Is there any real reason why we can't build boost earlier using their own
installers - e.g. as part of the base?

Baseless builds can install it the same way they install any other
dependencies. Conda can just install boost the same way it does any other
dependency.

I've always thought it strange the way we replicate the build process, It
would save a lot of time that we waste every time boost updates and having
to debug problems caused by not replicating the build properly (on linux
*and* windows).

Nick

On Fri, Nov 16, 2018 at 5:08 PM Robert Oeffner <rdo20 at cam.ac.uk> wrote:

> We are working on a newer version of Phaser. The new SConscript file for
> Phaser imports features from boost_python. Therefore it is currently not
> straightforward to build it since an empty build directory does not yet
> contain the boost_python module to be imported by SConscript (or
> python). So SCons crashes when it reads the new Phaser SCsonscript
> stating that boost_python cannot be imported. Currently our workaround
> is to first build CCTBX alone and then subsequently to build Phaser.
>
> My question is if it is possible to specify dependencies in
> cctbx_project/boost_adaptbx/SConscript to force building boost_python
> early on. On Windows boost_thread and a few other libraries are built
> before other SConscript files are read. So I have put some
> Depends(boost_thread,  boost_python) andDepends(boost_thread,
> boost_python_meta_ext)
> statements into cctbx_project/boost_adaptbx/SConscript. These do seem to
> force building the boost_python.lib and .dll files. But building the
> boost_python_meta_ext python module fails with the error:
> boost_adaptbx\meta_ext.cpp(14): fatal error C1083: Cannot open include
> file: 'boost_adaptbx/type_id_eq.h'
>
> It's possible that I'm not using SCons as it's supposed to be used. Let
> me know if anyone has a suggestion on how to force building boost_python
> before other SConscript are read.
>
>
> Many thanks,
>
>
> Rob
>
> --
> Robert Oeffner, Ph.D.
> Research Associate, The Read Group
> Department of Haematology,
> Cambridge Institute for Medical Research
> University of Cambridge
> Cambridge Biomedical Campus
> Wellcome Trust/MRC Building
> Hills Road
> Cambridge CB2 0XY
>
> www.cimr.cam.ac.uk/investigators/read/index.html
> tel: +44(0)1223 763234
>
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