Re: [Boost-build] Building Boost with multiple python versions

Subject: Re: [Boost-build] Building Boost with multiple python versions
From: Rene Rivera (grafikrobot_at_[hidden])
Date: 2017-02-15 17:00:54

On Wed, Feb 15, 2017 at 10:50 AM, Stefan Seefeld <stefan_at_[hidden]>
wrote:

> On 15.02.2017 11:39, Rene Rivera wrote:
> >
> > You can specify multiple features in the command like to indicate the
> > collective requirement request of what you want to build. Hence if you
> > configure the python interpreter with conditions that match that build
> > request it should use that interpreter only. That's assuming it wasn't
> > broken though :-(
>
> OK. But all existing bugs in the implementation aside, I think this is
> more of a UI concern: If I understand correctly, the "python" feature
> expects values that express versions (so I can select a python config on
> the command line with "<python>2.7".
> my question is about what happens if the version alone isn't an
> unambiguous discriminator, i.e. if I need to distinguish between a
> 64-bit python and a 32-bit python, both using the same version 2.7 ? How
> can I express that, both on the command line as well as in my
> user-config.jam configuration with the `using` rule ?
>

Given Tom's example user-config you can:

b2 python=2.7 address-model=32
b2 python=2.7 address-model=64
b2 python=3.5 address-model=32
b2 python=3.5 address-model=64

To build them individually. And if you plan on installing you'd have to
install to different locations as address-model doesn't tag the built
products. You can also build multiple combinations in one go with:

b2 python=2.7,3.5 address-model=32
b2 python=2.7,3.5 address-model=64

Or all the combinations with:

b2 python=2.7,3.5 address-model=32,64

I believe the general build request option syntax is documented. But I
leave finding that doc as an exercise for the reader ;-)

-- 
-- Rene Rivera
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