= note: ld: warning: ignoring file /Users/dmcclanahan/tools/p1/src/rust/engine/target/debug/build/engine_cffi-0cfc0b2057922e53/out/libnative_engine_ffi.a, building for macOS-x86_64 but attempting to link with file built for unknown-unsupported file format ( 0x21 0x3C 0x61 0x72 0x63 0x68 0x3E 0x0A 0x2F 0x20 0x20 0x20 0x20 0x20 0x20 0x20 )
          Undefined symbols for architecture x86_64:
            "_wrapped_PyInit_native_engine", referenced from:
                _PyInit_native_engine in engine_cffi.2e9skz2skowhnlv2.rcgu.o
            "_wrapped_initnative_engine", referenced from:
                _initnative_engine in engine_cffi.2e9skz2skowhnlv2.rcgu.o
          ld: symbol(s) not found for architecture x86_64
          clang: error: linker command failed with exit code 1 (use -v to see invocation)

does anyone know when this might happen? for what it's worth,

libnative_engine_ffi.a

is a normal

ar

archive, and it contains

native_engine.so

, which is definitely a mach-o x86_64 file:

X> file /Users/dmcclanahan/tools/p1/src/rust/engine/target/debug/build/engine_cffi-0cfc0b2057922e53/out/src/cffi/native_engine.o

/Users/dmcclanahan/tools/p1/src/rust/engine/target/debug/build/engine_cffi-0cfc0b2057922e53/out/src/cffi/native_engine.o: Mach-O 64-bit object x86_64

not sure if this is possibly due to missing

macosx-version-min

value? investigating