# echo "_fputc" >> reexports.exp
# echo "void sym1(void){}" | xcrun clang --target=arm64-apple-macos11.0 -o flat-reexport -dynamiclib -Wl,-reexported_symbols_list,reexports.exp -Wl,-flat_namespace -x c -
# obj2yaml --raw-segment=data --raw-segment=linkedit flat-reexport > flat-reexport.yaml
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...