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Subject: Re: [boost] [1.41] mpi + python + multiple variants
From: Vladimir Prus (vladimir_at_[hidden])
Date: 2009-11-18 15:02:33

Vladimir Prus wrote:

> There was a report on IRC that 1.41 beta fails to build with the following command:
> ./bjam threading=single,multi --with-python --with-mpi --layout=versioned
> because Boost.Build reports target name clash on stage/lib/ And sure it does.
> The mpi Jamfiles specify that a Python extension called 'mpi' should be built if
> Python is available. However, nothing adjusts the name of python extension, so
> ST and MT variants get the same name, and clash.
> For all I know, this problem was there all the time, so holding 1.41 for it is not
> necessary. But still would be nice to fix, and for that, I need an opinion from
> either MPI or Python experts here.
> 1. Shall the name of extension module be adjusted? If so, how? I doublt that
> Python users will jump with joy if asked to do 'import mpi-mt-gd-gcc34'.
> 2. Shall a specific variant be pinned?
> 3. Anything else?

Upon further discussion on IRC, it seems that the best way is to force threading=multi
for the extension. Given that Python is pretty much guaranteed to support threading,
this is the most useful variant.

Any objections before I hack the code accordingly?

- Volodya

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