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Tests fail to find Python.h · Issue #272 · xtensor-stack/xtensor-python · GitHub
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Tests fail to find Python.h #272

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@yurivict

First it failed like this:

In file included from /usr/local/include/pybind11/pytypes.h:12:
/usr/local/include/pybind11/detail/common.h:186:10: fatal error: 'Python.h' file not found
#include <Python.h>
         ^~~~~~~~~~

then it failed like this:

In file included from /usr/local/include/xtensor-python/pytensor.hpp:22:
/usr/local/include/xtensor-python/pycontainer.hpp:30:10: fatal error: 'numpy/arrayobject.h' file not found
#include "numpy/arrayobject.h"
         ^~~~~~~~~~~~~~~~~~~~~

I had to add these arguments to fix these failures:

CXXFLAGS=-I${PYTHON_INCLUDEDIR} -I${PYTHON_SITELIBDIR}/numpy/core/include

It should find relevant headers by itself.

Activity

  1. SylvainCorlay commented on Nov 27, 2021

    @SylvainCorlay
    Member

    When things are not found, the right definition to add is PYTHON_EXECUTABLE. We have found that more aggressive search strategies often ended up finding other python installs and linking with the wrong version.

  2. yurivict commented on Nov 27, 2021

    @yurivict
    Author

    cmake finds the python executable fine:

    -- Found PythonInterp: /usr/local/bin/python3.8 (found version "3.8.12") 
    -- Found PythonLibs: /usr/local/lib/libpython3.8.so
    

    It can't find the headers.
    Based on docs the same command that finds the python executable, FindPython, outputs the headers' location.

  3. SylvainCorlay commented on Nov 27, 2021

    @SylvainCorlay
    Member

    Thanks. Is this happening on a distribution a patched cpython distribution? We rely on the same approach as pybind11 for this ...

  4. yurivict commented on Nov 27, 2021

    @yurivict
    Author

    This is happening in the FreeBSD port.

  5. SylvainCorlay commented on Nov 27, 2021

    @SylvainCorlay
    Member

    Okay. I don't know if the freebsd port patches cpython. We had some serious headaches in the past with Debian patching it to split between dist-packages and site-packages.
    In any case we should address the freebsd case.

  6. tdegeus commented on Mar 2, 2023

    @tdegeus
    Member
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