Something on musllinux is off, the string replacement function get_library() is not being called when generating the pkg-config file. Is this from the wheel itself or from the build step...

ld: cannot find -l{get_library()}

Hmm. The older wheels had an empty Libs: line when calling scipy-openblas.get_pkg_config() (on posix). Then the shared object is not built-in to NumPy, and the _distributor_init preloads the shared object into the For the case where we want to replace the tarball with the wheel #25505, we need that line to specify the shared object Libs: -L${libdir} -lscipy_openblas. So in this case I think I need an option to get_pkg_config() which would only be used in the #25505 case. Then the scipy-openblas.pc file would differ depending on the use case.

The chosen solution in the scipy-openblas wheels means that the call to get_pkg_config() in spin will need to become get_pkg_config(use_preloading=True), the ones in #25505 can stay with the default argument

CI is passing, and meson is using the scipy-openblas wheel-provided pkg-config script, for instance in muslinux and windows