Fix signatures for function pointers passed through __Pyx_IsSameCFunction

[agriyakhetarpal]

Description

The rationale here is that in C code generated by Cython when compiling SciPy, __Pyx_IsSameCFunction usually carries void types for extension modules, but we need to cast to ints instead. As this phenomenon occurs during the code generation steps where the generated files are not addressable via patches or sed commands, we therefore handle it via scipy_fix_cfile() here.

Tip

This PR builds upon the changes made in #168, and it is the second PR in a series of PRs to build newer versions of SciPy; please review that PR first.

PR stack

Please review the following PRs in the order listed below:

• Ignore -headerpad_max_install_names and -dead_strip_dylibs for wasm-ld #168
• Fix signatures for function pointers passed through __Pyx_IsSameCFunction #213 ➡️ you are here
• Add pyodide-build repository as a submodule pyodide-recipes#140
• SciPy v1.16.0 pyodide-recipes#141

[ryanking13]

Thanks!

[agriyakhetarpal]

Thanks for the review!