import numpy error

ipython
Python 3.8.0 (default, Dec  5 2019, 10:23:28)
Type 'copyright', 'credits' or 'license' for more information
IPython 7.12.0 -- An enhanced Interactive Python. Type '?' for help.

In [1]: import numpy
WARNING: linker: /data/data/com.termux/files/usr/lib/python3.8/site-packages/numpy/core/_multiarray_umath.cpython-38.so: unused DT entry: type 0x6ffffef5 arg 0x18d0
WARNING: linker: /data/data/com.termux/files/usr/lib/python3.8/site-packages/numpy/core/_multiarray_tests.cpython-38.so: unused DT entry: type 0x6ffffef5 arg 0xd38
---------------------------------------------------------------------------
ImportError                               Traceback (most recent call last)
<ipython-input-1-d4cdadb62aa7> in <module>
----> 1 import numpy

/data/data/com.termux/files/usr/lib/python3.8/site-packages/numpy/__init__.py in <module>
    140     from . import _distributor_init
    141
--> 142     from . import core
    143     from .core import *
    144     from . import compat

/data/data/com.termux/files/usr/lib/python3.8/site-packages/numpy/core/__init__.py in <module>
    102 # do this after everything else, to minimize the chance of this misleadingly
    103 # appearing in an import-time traceback
--> 104 from . import _add_newdocs
    105 # add these for module-freeze analysis (like PyInstaller)
    106 from . import _dtype_ctypes

/data/data/com.termux/files/usr/lib/python3.8/site-packages/numpy/core/_add_newdocs.py in <module>
   4439
   4440
-> 4441 add_newdoc('numpy.core._multiarray_tests', 'format_float_OSprintf_g',
   4442     """
   4443     format_float_OSprintf_g(val, precision)

/data/data/com.termux/files/usr/lib/python3.8/site-packages/numpy/core/function_base.py in add_newdoc(place, obj, doc, warn_on_python)
    504     If possible it should be avoided.
    505     """
--> 506     new = getattr(__import__(place, globals(), {}, [obj]), obj)
    507     if isinstance(doc, str):
    508         _add_docstring(new, doc.strip(), warn_on_python)

ImportError: dlopen failed: cannot locate symbol "tanh" referenced by "/data/data/com.termux/files/usr/lib/python3.8/site-packages/numpy/core/_multiarray_tests.cpython-38.so"...

[sbroberg]

@rgommers

Thanks for the prompt reply. I can have a very reproducible case for you within a week

If you open a new issue, please try and make it reproducible. Also, cross-compiling is generally problematic, distutils doesn’t really support it. I also have no idea what crossenv is. My recommendation would to avoid cross-compiling if at all possible. There are ARM64 wheels in the making, and conda-forge has ARM64 already.

Believe me, nothing would please me more than to not have to do build this stuff myself. FYI, crossenv is a python module that facilitates cross-compiling other python modules.

You’ll have to forgive me, because python is not my domain, and I’ve been tasked with being able to run our test suite (written in python) on this qualcomm arm64 android board. From your suggestion above, I looked briefly at the conda-forge intro page and it presumes I have conda installed. Does this mean I have to cross compile conda? The system I’m on has no apt, or even a c compiler.

I’ve made some progress switching to using Termux and starting an ssh server so I can connect to our Android board (this has apt and allowed me to install numpy successfly via pip), but I’m stuck on getting opencv (with python bindings) to build. I realize this isn’t your job, but I’d appreciate it if you can point me at a resource that sets me in the right direction, as there seem to be a million different ways of supposedly skinning this cat.

[rgommers]

Ah, missed that. Then contributing on the conda-forge feedstock would be my recommendation.