numpy 2.0

[zhaoruiyang98]

Hi!

The pyclass building fails because of the recent numpy 2.0 update (pip will create an isolated virtual environment to build the package, so the latest numpy is always used). A workaround is to specify numpy<2 as the build time dependency in the pyproject.toml file.

A minimum example to reproduce this issue:

conda create -p ./env "python=3.10" "numpy<2" "cython"
conda activate ./env
python -m pip install git+https://github.com/adematti/pyclass

The error message appears like

      [1/1] Cythonizing pyclass/base/binding.pyx
      building 'pyclass.base.binding' extension
      creating build/temp.macosx-11.0-arm64-cpython-310/pyclass
      creating build/temp.macosx-11.0-arm64-cpython-310/pyclass/base
      /opt/homebrew/bin/gcc-14 -Wno-unused-result -Wsign-compare -Wunreachable-code -DNDEBUG -fwrapv -O2 -Wall -fPIC -O2 -isystem /Users/ruiyang/source/tmp/env/include -arch arm64 -fPIC -O2 -isystem /Users/ruiyang/source/tmp/env/include -arch arm64 -Ibuild/temp.macosx-11.0-arm64-cpython-310/base/external/RecfastCLASS -Ibuild/temp.macosx-11.0-arm64-cpython-310/base/external/HyRec2020 -Ibuild/temp.macosx-11.0-arm64-cpython-310/base/external/heating -Ibuild/temp.macosx-11.0-arm64-cpython-310/base/include -I/Users/ruiyang/source/tmp/env/include/python3.10 -I/private/var/folders/kv/0xt54_y90ps_mz6_k9b20xgc0000gn/T/pip-build-env-gsff01n2/overlay/lib/python3.10/site-packages/numpy/_core/include -c pyclass/base/binding.c -o build/temp.macosx-11.0-arm64-cpython-310/pyclass/base/binding.o
      In file included from /private/var/folders/kv/0xt54_y90ps_mz6_k9b20xgc0000gn/T/pip-build-env-gsff01n2/overlay/lib/python3.10/site-packages/numpy/_core/include/numpy/ndarraytypes.h:1909,
                       from /private/var/folders/kv/0xt54_y90ps_mz6_k9b20xgc0000gn/T/pip-build-env-gsff01n2/overlay/lib/python3.10/site-packages/numpy/_core/include/numpy/ndarrayobject.h:12,
                       from /private/var/folders/kv/0xt54_y90ps_mz6_k9b20xgc0000gn/T/pip-build-env-gsff01n2/overlay/lib/python3.10/site-packages/numpy/_core/include/numpy/arrayobject.h:5,
                       from pyclass/base/binding.c:1260:
      /private/var/folders/kv/0xt54_y90ps_mz6_k9b20xgc0000gn/T/pip-build-env-gsff01n2/overlay/lib/python3.10/site-packages/numpy/_core/include/numpy/npy_1_7_deprecated_api.h:17:2: warning: #warning "Using deprecated NumPy API, disable it with " "#define NPY_NO_DEPRECATED_API NPY_1_7_API_VERSION" [-Wcpp]
         17 | #warning "Using deprecated NumPy API, disable it with " \
            |  ^~~~~~~
      In file included from /private/var/folders/kv/0xt54_y90ps_mz6_k9b20xgc0000gn/T/pip-build-env-gsff01n2/overlay/lib/python3.10/site-packages/numpy/_core/include/numpy/npy_common.h:376,
                       from /private/var/folders/kv/0xt54_y90ps_mz6_k9b20xgc0000gn/T/pip-build-env-gsff01n2/overlay/lib/python3.10/site-packages/numpy/_core/include/numpy/ndarraytypes.h:4:
      build/temp.macosx-11.0-arm64-cpython-310/base/include/quadrature.h:19:10: error: expected identifier or '(' before '__extension__'
         19 |   double I;             /* Estimate of integral */
            |          ^
      build/temp.macosx-11.0-arm64-cpython-310/base/include/arrays.h:465:56: error: expected ')' before '__extension__'
        465 |                                  double * __restrict__ I,
            |                                                        ^
      In file included from build/temp.macosx-11.0-arm64-cpython-310/base/include/class.h:17,
                       from pyclass/base/binding.c:1267:
      build/temp.macosx-11.0-arm64-cpython-310/base/include/arrays.h:466:34: error: expected ';', ',' or ')' before 'ErrorMsg'
        466 |                                  ErrorMsg errmsg);
            |                                  ^~~~~~~~
      build/temp.macosx-11.0-arm64-cpython-310/base/include/arrays.h:472:59: error: expected ')' before '__extension__'
        472 |                                     double * __restrict__ I,
            |                                                           ^
      build/temp.macosx-11.0-arm64-cpython-310/base/include/arrays.h:473:37: error: expected ';', ',' or ')' before 'ErrorMsg'
        473 |                                     ErrorMsg errmsg);
            |                                     ^~~~~~~~
      error: command '/opt/homebrew/bin/gcc-14' failed with exit code 1
      [end of output]

  note: This error originates from a subprocess, and is likely not a problem with pip.
  ERROR: Failed building wheel for pyclass

[adematti]

Hi Ruiyang,

Thanks! Can you try with the last commit b322c901032018536418da537e0ce9c0785cb949?

[zhaoruiyang98]

Thanks Arnaud, it works now!