wip/py-numpy + blas

[Thomas Klausner <wiz%NetBSD.org@localhost>]

Hi!

py-numpy switched its build system (when using the Python
infrastructure) from setuptools/wheel to meson via python. I've
started a package in wip/py-numpy.

Configure detects blas:

Run-time dependency scipy-openblas found: NO (tried pkgconfig and cmake)
Run-time dependency mkl found: NO (tried pkgconfig and system)
Run-time dependency mkl found: NO (tried pkgconfig and system)
Run-time dependency accelerate found: NO (tried system)
Run-time dependency openblas found: NO (tried pkgconfig, pkgconfig, pkgconfig, system and cmake)
Run-time dependency flexiblas found: NO (tried pkgconfig and cmake)
Run-time dependency blis found: NO (tried pkgconfig and cmake)
Run-time dependency blas found: YES 3.11.0
Message: BLAS symbol suffix:
Run-time dependency mkl found: NO (tried pkgconfig and system)
Run-time dependency accelerate found: NO (tried system)
Run-time dependency openblas found: NO (tried pkgconfig, pkgconfig, pkgconfig, system and cmake)
Run-time dependency flexiblas found: NO (tried pkgconfig and cmake)
Run-time dependency lapack found: YES 3.11.0

The build works but the self-tests fail because:

Original error was: /scratch/wip/py-numpy/work/.destdir/usr/pkg/lib/python3.11/site-packages/numpy/core/_multiarray_umath.so: Undefined PLT symbol "cblas_cdotc_sub" (symnum = 19)

Which is not surprising since it's not linked against cblas:

# ldd /scratch/wip/py-numpy/work/.destdir/usr/pkg/lib/python3.11/site-packages/numpy/core/_multiarray_umath.so
/scratch/wip/py-numpy/work/.destdir/usr/pkg/lib/python3.11/site-packages/numpy/core/_multiarray_umath.so:
        -lm.0 => /usr/lib/libm.so.0
        -lc.12 => /usr/lib/libc.so.12
        -lgcc_s.1 => /usr/lib/libgcc_s.so.1


The current package already has its own make_env.mk file for handling
the blas dependency.

Can someone please adapt the blas handling for the new build system?

Thanks,
Thomas