Thanks for investigating this issue @chigozienri! Regarding the OpenMP error, the issue is that as far as I understand scikit-image will try optionally build with OpenMP (here). In the context of pyodide this wouldn't work, because,

it would do a first compilation pass with gcc on the host system in which case OpenMP will work fine
then it would take the resulting log with compilations commands and run them with emscripten /emcc in which case those openmp includes will fail.

A temporary workaround could be to add a patch to put,

    class ConditionalOpenMP(build_ext):

        def can_compile_link(self):
             return False

in setup.py (see how patches are specified in other meta.yaml packages).

I'm not sure if there is anything we could do to avoid having to patch in the long term, maybe adding a specific env variable to scikit-image? Unfortunately adding conditions along the lines of,

        def can_compile_link(self):
             if sys.platform() == "emscripten":
                 return False

to setup.py also won't work as the first pass is with gcc, though maybe this is something that we should try to improve on the pyodide side.

Uh oh!

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