Bug 2389647

Description of problem:
Package python-matplotlib fails to build from source in Fedora Rawhide/43 on ppc64le architecture.

Version-Release number of selected component (if applicable):
3.10.5-1.fc43

Steps to Reproduce:
koji build --scratch f44 python-matplotlib-3.10.5-1.fc43.src.rpm

Additional info:
This package is tracked by Koschei. See:
https://koschei.fedoraproject.org/package/python-matplotlib

Results:

_____________________________ test_rasterized[svg] _____________________________
[gw4] linux -- Python 3.14.0 /usr/bin/python3
ext = 'svg', request = <FixtureRequest for <Function test_rasterized[svg]>>
args = (), kwargs = {}, file_name = 'test_rasterized[svg]'
fig_test = <Figure size 640x480 with 1 Axes>
fig_ref = <Figure size 640x480 with 1 Axes>, figs = []
test_image_path = PosixPath('/builddir/build/BUILD/python-matplotlib-3.10.5-build/matplotlib-3.10.5/result_images/test_backend_svg/test_rasterized[svg].svg')
ref_image_path = PosixPath('/builddir/build/BUILD/python-matplotlib-3.10.5-build/matplotlib-3.10.5/result_images/test_backend_svg/test_rasterized[svg]-expected.svg')
    @pytest.mark.parametrize("ext", extensions)
    def wrapper(*args, ext, request, **kwargs):
        if 'ext' in old_sig.parameters:
            kwargs['ext'] = ext
        if 'request' in old_sig.parameters:
            kwargs['request'] = request
    
        file_name = "".join(c for c in request.node.name
                            if c in ALLOWED_CHARS)
        try:
            fig_test = plt.figure("test")
            fig_ref = plt.figure("reference")
            with _collect_new_figures() as figs:
                func(*args, fig_test=fig_test, fig_ref=fig_ref, **kwargs)
            if figs:
                raise RuntimeError('Number of open figures changed during '
                                   'test. Make sure you are plotting to '
                                   'fig_test or fig_ref, or if this is '
                                   'deliberate explicitly close the '
                                   'new figure(s) inside the test.')
            test_image_path = result_dir / (file_name + "." + ext)
            ref_image_path = result_dir / (file_name + "-expected." + ext)
            fig_test.savefig(test_image_path)
            fig_ref.savefig(ref_image_path)
>           _raise_on_image_difference(
                ref_image_path, test_image_path, tol=tol
            )
E           matplotlib.testing.exceptions.ImageComparisonFailure: images not close (RMS 147.627):
E           	result_images/test_backend_svg/test_rasterized[svg]_svg.png
E           	result_images/test_backend_svg/test_rasterized[svg]-expected_svg.png
E           	result_images/test_backend_svg/test_rasterized[svg]_svg-failed-diff.png