[SciPy-Dev] Cross Compiling SciPy?

[Hickey, Joseph P. (GRC-LSS0)[ZIN TECHNOLOGIES INC]]

Hello all -- apologies if similar question(s) have been asked before, 
but I didn't see anything in the archives.

I'm trying to compile NumPy + SciPy for an embedded target -- PowerPC 
target CPU, x86-64 host machine.  The build system I'm using is based on 
Yocto/OpenEmbedded, basically a fairly standard cross compile setup.   
I'm using tagged versions from the git repositories, specifically 
v1.10.4 of NumPy and v0.17.1 for SciPy, and Python 2.7 as provided by 
the upstream "Poky" distribution.  So far, NumPy has been relatively 
painless, the "setup.py" script seems to obey the BUILD_SYS/HOST_SYS 
variables and successfully builds for the target architecture.

SciPy, on the other hand, is more problematic.  The provided "setup.py" 
script was not even getting started because it attempts this:

         from numpy.distutils.core import setup

But the "setup.py" script is actually running on the host machine in 
this case, so it is importing the setup from the host installation, NOT 
the target's numpy installation.  If I install numpy on the host machine 
as well, this import now works, but it creates a mixture of binaries -- 
the build fails later on when it attempts to link binaries built using 
the native gcc with other binaries built using the cross compiler.  I've 
also tried the previous release (v0.16.1 tag) with similar results.

Has anyone successfully cross compiled SciPy that could provide some 
guidance here?  Is there anything special I need to do with the NumPy 
cross installation such that the SciPy build can find it?

Thanks in advance
-Joe