fix: fix broken static builds

[braindigitalis]

Fixes unix-like static builds (NOT windows)
NOTE: Does not static link libm. This is impossible on glibc without linking the rest of glibc, and macos seems happy enough to not static link libm too:
https://bugzilla.redhat.com/show_bug.cgi?id=1433347
https://stackoverflow.com/questions/56415996/linking-error-selective-static-linking-of-libm-a-in-gcc

Code change checklist

• I have ensured that all methods and functions are fully documented using doxygen style comments.
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• I tested that my change works before raising the PR.
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• I have not built my pull request using AI, a static analysis tool or similar without any human oversight.

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