[Boost-build] installing Boost.Python NumPy extension

Subject: [Boost-build] installing Boost.Python NumPy extension
From: Stefan Seefeld (stefan_at_[hidden])
Date: 2016-10-13 22:10:30

I have added some logic to my Boost.Python Jamfile to define a
'libboost_numpy' library (using `lib boost_numpy ...`), which builds fine.

I then added a call to `boost-install boost_numpy`, which results in the
obscure error

  $ ../../../b2 install --prefix=/usr/local/Boost
  error: No best alternative for ../../../libs/python/build/install
    next alternative: required properties: (empty)
        matched
    next alternative: required properties: (empty)
        matched
  ...found 1 target...

Can anyone help me understand what the error means, and what I may have
done wrong ? (The full changeset causing the error is here:

https://github.com/stefanseefeld/boost.python/commit/38a9031c3446382166a03a167f4b8de20be70a15

(Note that both building and testing works fine. The error only appears
during installing.)

Thanks,

        Stefan

-- 
      ...ich hab' noch einen Koffer in Berlin...