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When compiling libcxx 19, I noticed that libcalls to
__divsc3et al were emitted. These follow the C calling convention by default. I have provided a basic C implementation of these complex floating point routines so users will not get a linker error.The code also works on ez80-clang 15.0.0 so these can be back-ported if needed.
https://godbolt.org/z/daT41YeKP