(Copy pasted from FB17261080 that I submitted)
Hi:
Apple's SDK (libSystem.B.tbd) provides definition for multiple symbols(__unw_add_dynamic_fde / __unw_add_find_dynamic_unwind_sections ), but doesn't provide corresponding headers, available in LLVM upstream as libunwind_ext.h
We need such headers to write Exception-Enabled JIT Framework for macOS
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