Repository: rust
Issue: Apple arm64e targets fail to link with newer Xcode 15
Labels: O-macos,O-ios,T-compiler,C-bug,O-AArch64

See tracking issue for these targets in https://github.com/rust-lang/rust/issues/73628.

Building a project using the `arm64e-apple-ios` target fails to link when using Xcode 15.4. Using Xcode 14.3.1 works.

This might also be the case for `arm64e-apple-darwin`, but I can't test that due to https://github.com/rust-lang/cc-rs/issues/1205.

```console
$ cargo new foo && cd foo && cargo +nightly build --target=arm64e-apple-ios -Zbuild-std
// Or
$ ./x test --target=arm64e-apple-ios
```

The exact error is:

```
  = note: ld: warning: search path '$HOME/.rustup/toolchains/nightly-2024-01-15-aarch64-apple-darwin/lib/rustlib/arm64e-apple-ios/lib' not found
          ld: warning: search path '$HOME/.rustup/toolchains/nightly-2024-01-15-aarch64-apple-darwin/lib/rustlib/arm64e-apple-ios/lib' not found
          ld: warning: ignoring file '/private/var/folders/0j/tk3sfgz540712zgqd1hrry0m0000gn/T/rustcMbh3OI/symbols.o': found architecture 'arm64e.old', required architecture 'arm64e'
          ld: warning: ignoring file '$PROJECT/target/arm64e-apple-ios/debug/deps/foo-fd00ad1dff52af6b.26sqj2knsb351po8.rcgu.o': found architecture 'arm64e.old', required architecture 'arm64e'
          ld: warning: ignoring file '$PROJECT/target/arm64e-apple-ios/debug/deps/foo-fd00ad1dff52af6b.3mx9ar89kmsx5j1l.rcgu.o': found architecture 'arm64e.old', required architecture 'arm64e'
          ld: warning: ignoring file '$PROJECT/target/arm64e-apple-ios/debug/deps/foo-fd00ad1dff52af6b.45hdsivk0rjaalqm.rcgu.o': found architecture 'arm64e.old', required architecture 'arm64e'
          ld: warning: ignoring file '$PROJECT/target/arm64e-apple-ios/debug/deps/foo-fd00ad1dff52af6b.44zwmgr66v8ihk0u.rcgu.o': found architecture 'arm64e.old', required architecture 'arm64e'
          ld: warning: ignoring file '$PROJECT/target/arm64e-apple-ios/debug/deps/libpanic_unwind-f79c716b594cd87d.rlib[3](panic_unwind-f79c716b594cd87d.panic_unwind.b0d5fa77f79efb86-cgu.0.rcgu.o)': found architecture 'arm64e.old', required architecture 'arm64e'
          ld: warning: ignoring file '$PROJECT/target/arm64e-apple-ios/debug/deps/libpanic_unwind-f79c716b594cd87d.rlib[2](lib.rmeta)': found architecture 'arm64e.old', required architecture 'arm64e'
          ld: warning: ignoring file '$PROJECT/target/arm64e-apple-ios/debug/deps/foo-fd00ad1dff52af6b.5dkwtrczm5qjphu6.rcgu.o': found architecture 'arm64e.old', required architecture 'arm64e'
          ld: warning: ignoring file '$PROJECT/target/arm64e-apple-ios/debug/deps/foo-fd00ad1dff52af6b.42cln6of8os0f9gy.rcgu.o': found architecture 'arm64e.old', required architecture 'arm64e'
          ld: warning: ignoring file '$PROJECT/target/arm64e-apple-ios/debug/deps/foo-fd00ad1dff52af6b.3d02ymmiyeu3vpo7.rcgu.o': found architecture 'arm64e.old', required architecture 'arm64e'
          ld: warning: ignoring file '$PROJECT/target/arm64e-apple-ios/debug/deps/libaddr2line-fb1df4cdd978991d.rlib[3](addr2line-fb1df4cdd978991d.addr2line.b32b3d1578f40f68-cgu.0.rcgu.o)': found architecture 'arm64e.old', required architecture 'arm64e'
          ld: warning: ignoring file '$PROJECT/target/arm64e-apple-ios/debug/deps/libaddr2line-fb1df4cdd978991d.rlib[2](lib.rmeta)': found architecture 'arm64e.old', required architecture 'arm64e'
          ld: warning: ignoring file '$PROJECT/target/arm64e-apple-ios/debug/deps/librustc_demangle-070595bb373ffce1.rlib[4](rustc_demangle-070595bb373ffce1.rustc_demangle.319f1cf397a9ecca-cgu.1.rcgu.o)': found architecture 'arm64e.old', required architecture 'arm64e'
          ld: warning: ignoring file '$PROJECT/target/arm64e-apple-ios/debug/deps/librustc_demangle-070595bb373ffce1.rlib[3](rustc_demangle-070595bb373ffce1.rustc_demangle.319f1cf397a9ecca-cgu.0.rcgu.o)': found architecture 'arm64e.old', required architecture 'arm64e'
          ld: warning: ignoring file '$PROJECT/target/arm64e-apple-ios/debug/deps/libstd_detect-72eccc55aeb6dc6e.rlib[3](std_detect-72eccc55aeb6dc6e.std_detect.b917a1edde698b77-cgu.0.rcgu.o)': found architecture 'arm64e.old', required architecture 'arm64e'
          ld: warning: ignoring file '$PROJECT/target/arm64e-apple-ios/debug/deps/foo-fd00ad1dff52af6b.529zhzjdbavai3fn.rcgu.o': found architecture 'arm64e.old', required architecture 'arm64e'
          ld: warning: ignoring file '$PROJECT/target/arm64e-apple-ios/debug/deps/libadler-2503ee2f726d439b.rlib[3](adler-2503ee2f726d439b.adler.9aa407738f930ee2-cgu.0.rcgu.o)': found architecture 'arm64e.old', required architecture 'arm64e'
          ld: warning: ignoring file '$PROJECT/target/arm64e-apple-ios/debug/deps/libminiz_oxide-d07b686f8d54a430.rlib[2](lib.rmeta)': found architecture 'arm64e.old', required architecture 'arm64e'
          ld: warning: ignoring file '$PROJECT/target/arm64e-apple-ios/debug/deps/libmemchr-075960409c25bbb9.rlib[3](memchr-075960409c25bbb9.memchr.adf4ce8aa7930ef2-cgu.0.rcgu.o)': found architecture 'arm64e.old', required architecture 'arm64e'
          ld: warning: ignoring file '$PROJECT/target/arm64e-apple-ios/debug/deps/librustc_demangle-070595bb373ffce1.rlib[2](lib.rmeta)': found architecture 'arm64e.old', required architecture 'arm64e'
          ld: warning: ignoring file '$PROJECT/target/arm64e-apple-ios/debug/deps/librustc_std_workspace_alloc-d4a4490e1effb483.rlib[3](rustc_std_workspace_alloc-d4a4490e1effb483.rustc_std_workspace_alloc.2e3ab25734ed68d6-cgu.0.rcgu.o)': found architecture 'arm64e.old', required architecture 'arm64e'
          ld: warning: ignoring file '$PROJECT/target/arm64e-apple-ios/debug/deps/libadler-2503ee2f726d439b.rlib[2](lib.rmeta)': found architecture 'arm64e.old', required architecture 'arm64e'
          ld: warning: ignoring file '$PROJECT/target/arm64e-apple-ios/debug/deps/libhashbrown-e6b966447a347358.rlib[2](lib.rmeta)': found architecture 'arm64e.old', required architecture 'arm64e'
          ld: warning: ignoring file '$PROJECT/target/arm64e-apple-ios/debug/deps/libminiz_oxide-d07b686f8d54a430.rlib[3](miniz_oxide-d07b686f8d54a430.miniz_oxide.c3e4f4e376ceb04b-cgu.0.rcgu.o)': found architecture 'arm64e.old', required architecture 'arm64e'
          ld: warning: ignoring file '$PROJECT/target/arm64e-apple-ios/debug/deps/librustc_std_workspace_alloc-d4a4490e1effb483.rlib[2](lib.rmeta)': found architecture 'arm64e.old', required architecture 'arm64e'
          ld: warning: ignoring file '$PROJECT/target/arm64e-apple-ios/debug/deps/libunwind-8017996f774c6593.rlib[2](lib.rmeta)': found architecture 'arm64e.old', required architecture 'arm64e'
          ld: warning: ignoring file '$PROJECT/target/arm64e-apple-ios/debug/deps/libunwind-8017996f774c6593.rlib[3](unwind-8017996f774c6593.unwind.e4507e56c8db69a9-cgu.0.rcgu.o)': found architecture 'arm64e.old', required architecture 'arm64e'
          ld: warning: ignoring file '$PROJECT/target/arm64e-apple-ios/debug/deps/libhashbrown-e6b966447a347358.rlib[3](hashbrown-e6b966447a347358.hashbrown.2979a5dc0df80385-cgu.0.rcgu.o)': found architecture 'arm64e.old', required architecture 'arm64e'
          ld: warning: ignoring file '$PROJECT/target/arm64e-apple-ios/debug/deps/libmemchr-075960409c25bbb9.rlib[2](lib.rmeta)': found architecture 'arm64e.old', required architecture 'arm64e'
          ld: warning: ignoring file '$PROJECT/target/arm64e-apple-ios/debug/deps/libgimli-9049beec931fd184.rlib[7](gimli-9049beec931fd184.gimli.291f80e1c06160d3-cgu.4.rcgu.o)': found architecture 'arm64e.old', required architecture 'arm64e'
          ld: warning: ignoring file '$PROJECT/target/arm64e-apple-ios/debug/deps/libgimli-9049beec931fd184.rlib[6](gimli-9049beec931fd184.gimli.291f80e1c06160d3-cgu.3.rcgu.o)': found architecture 'arm64e.old', required architecture 'arm64e'
          ld: warning: ignoring file '$PROJECT/target/arm64e-apple-ios/debug/deps/libstd_detect-72eccc55aeb6dc6e.rlib[2](lib.rmeta)': found architecture 'arm64e.old', required architecture 'arm64e'
          ld: warning: ignoring file '$PROJECT/target/arm64e-apple-ios/debug/deps/librustc_std_workspace_core-57c9b9461bb0a02d.rlib[3](rustc_std_workspace_core-57c9b9461bb0a02d.rustc_std_workspace_core.2cc70b459bc5d55b-cgu.0.rcgu.o)': found architecture 'arm64e.old', required architecture 'arm64e'
          ld: warning: ignoring file '$PROJECT/target/arm64e-apple-ios/debug/deps/libcfg_if-ab04255e62dd4d18.rlib[3](cfg_if-ab04255e62dd4d18.cfg_if.9512f2fb5bcdd678-cgu.0.rcgu.o)': found architecture 'arm64e.old', required architecture 'arm64e'
          ld: warning: ignoring file '$PROJECT/target/arm64e-apple-ios/debug/deps/libobject-8770e67c8539abe4.rlib[5](object-8770e67c8539abe4.object.58425892dede8931-cgu.2.rcgu.o)': found architecture 'arm64e.old', required architecture 'arm64e'
          ld: warning: ignoring file '$PROJECT/target/arm64e-apple-ios/debug/deps/liblibc-e3f8a8bc867e7d2f.rlib[3](libc-e3f8a8bc867e7d2f.libc.565c562bf8166800-cgu.0.rcgu.o)': found architecture 'arm64e.old', required architecture 'arm64e'
          ld: warning: ignoring file '$PROJECT/target/arm64e-apple-ios/debug/deps/liblibc-e3f8a8bc867e7d2f.rlib[2](lib.rmeta)': found architecture 'arm64e.old', required architecture 'arm64e'
          ld: warning: ignoring file '$PROJECT/target/arm64e-apple-ios/debug/deps/libgimli-9049beec931fd184.rlib[5](gimli-9049beec931fd184.gimli.291f80e1c06160d3-cgu.2.rcgu.o)': found architecture 'arm64e.old', required architecture 'arm64e'
          ld: warning: ignoring file '$PROJECT/target/arm64e-apple-ios/debug/deps/libcompiler_builtins-ce1cb3c3fce0a16d.rlib[5](compiler_builtins-ce1cb3c3fce0a16d.compiler_builtins.6948197a790d2fa7-cgu.2.rcgu.o)': found architecture 'arm64e.old', required architecture 'arm64e'
          ld: warning: ignoring file '$PROJECT/target/arm64e-apple-ios/debug/deps/libcfg_if-ab04255e62dd4d18.rlib[2](lib.rmeta)': found architecture 'arm64e.old', required architecture 'arm64e'
          ld: warning: ignoring file '$PROJECT/target/arm64e-apple-ios/debug/deps/libgimli-9049beec931fd184.rlib[4](gimli-9049beec931fd184.gimli.291f80e1c06160d3-cgu.1.rcgu.o)': found architecture 'arm64e.old', required architecture 'arm64e'
          ld: warning: ignoring file '$PROJECT/target/arm64e-apple-ios/debug/deps/libgimli-9049beec931fd184.rlib[3](gimli-9049beec931fd184.gimli.291f80e1c06160d3-cgu.0.rcgu.o)': found architecture 'arm64e.old', required architecture 'arm64e'
          ld: warning: ignoring file '$PROJECT/target/arm64e-apple-ios/debug/deps/liballoc-85c3b697c47ff844.rlib[6](alloc-85c3b697c47ff844.alloc.2bb4af1538dd142e-cgu.3.rcgu.o)': found architecture 'arm64e.old', required architecture 'arm64e'
          ld: warning: ignoring file '$PROJECT/target/arm64e-apple-ios/debug/deps/libstd-e730827ac25e8eb8.rlib[18](std-e730827ac25e8eb8.std.390e242b97fa85e2-cgu.15.rcgu.o)': found architecture 'arm64e.old', required architecture 'arm64e'
          ld: warning: ignoring file '$PROJECT/target/arm64e-apple-ios/debug/deps/libobject-8770e67c8539abe4.rlib[4](object-8770e67c8539abe4.object.58425892dede8931-cgu.1.rcgu.o)': found architecture 'arm64e.old', required architecture 'arm64e'
          ld: warning: ignoring file '$PROJECT/target/arm64e-apple-ios/debug/deps/libstd-e730827ac25e8eb8.rlib[17](std-e730827ac25e8eb8.std.390e242b97fa85e2-cgu.14.rcgu.o)': found architecture 'arm64e.old', required architecture 'arm64e'
          ld: warning: ignoring file '$PROJECT/target/arm64e-apple-ios/debug/deps/libcompiler_builtins-ce1cb3c3fce0a16d.rlib[4](compiler_builtins-ce1cb3c3fce0a16d.compiler_builtins.6948197a790d2fa7-cgu.1.rcgu.o)': found architecture 'arm64e.old', required architecture 'arm64e'
          ld: warning: ignoring file '$PROJECT/target/arm64e-apple-ios/debug/deps/libcompiler_builtins-ce1cb3c3fce0a16d.rlib[3](compiler_builtins-ce1cb3c3fce0a16d.compiler_builtins.6948197a790d2fa7-cgu.0.rcgu.o)': found architecture 'arm64e.old', required architecture 'arm64e'
          ld: warning: ignoring file '$PROJECT/target/arm64e-apple-ios/debug/deps/libobject-8770e67c8539abe4.rlib[3](object-8770e67c8539abe4.object.58425892dede8931-cgu.0.rcgu.o)': found architecture 'arm64e.old', required architecture 'arm64e'
          ld: warning: ignoring file '$PROJECT/target/arm64e-apple-ios/debug/deps/libstd-e730827ac25e8eb8.rlib[16](std-e730827ac25e8eb8.std.390e242b97fa85e2-cgu.13.rcgu.o)': found architecture 'arm64e.old', required architecture 'arm64e'
          ld: warning: ignoring file '$PROJECT/target/arm64e-apple-ios/debug/deps/libcompiler_builtins-ce1cb3c3fce0a16d.rlib[2](lib.rmeta)': found architecture 'arm64e.old', required architecture 'arm64e'
          ld: warning: ignoring file '$PROJECT/target/arm64e-apple-ios/debug/deps/libobject-8770e67c8539abe4.rlib[2](lib.rmeta)': found architecture 'arm64e.old', required architecture 'arm64e'
          ld: warning: ignoring file '$PROJECT/target/arm64e-apple-ios/debug/deps/libgimli-9049beec931fd184.rlib[2](lib.rmeta)': found architecture 'arm64e.old', required architecture 'arm64e'
          ld: warning: ignoring file '$PROJECT/target/arm64e-apple-ios/debug/deps/librustc_std_workspace_core-57c9b9461bb0a02d.rlib[2](lib.rmeta)': found architecture 'arm64e.old', required architecture 'arm64e'
          ld: warning: ignoring file '$PROJECT/target/arm64e-apple-ios/debug/deps/libstd-e730827ac25e8eb8.rlib[15](std-e730827ac25e8eb8.std.390e242b97fa85e2-cgu.12.rcgu.o)': found architecture 'arm64e.old', required architecture 'arm64e'
          ld: warning: ignoring file '$PROJECT/target/arm64e-apple-ios/debug/deps/libstd-e730827ac25e8eb8.rlib[14](std-e730827ac25e8eb8.std.390e242b97fa85e2-cgu.11.rcgu.o)': found architecture 'arm64e.old', required architecture 'arm64e'
          ld: warning: ignoring file '$PROJECT/target/arm64e-apple-ios/debug/deps/libstd-e730827ac25e8eb8.rlib[13](std-e730827ac25e8eb8.std.390e242b97fa85e2-cgu.10.rcgu.o)': found architecture 'arm64e.old', required architecture 'arm64e'
          ld: warning: ignoring file '$PROJECT/target/arm64e-apple-ios/debug/deps/libstd-e730827ac25e8eb8.rlib[12](std-e730827ac25e8eb8.std.390e242b97fa85e2-cgu.09.rcgu.o)': found architecture 'arm64e.old', required architecture 'arm64e'
          ld: warning: ignoring file '$PROJECT/target/arm64e-apple-ios/debug/deps/libstd-e730827ac25e8eb8.rlib[11](std-e730827ac25e8eb8.std.390e242b97fa85e2-cgu.08.rcgu.o)': found architecture 'arm64e.old', required architecture 'arm64e'
          ld: warning: ignoring file '$PROJECT/target/arm64e-apple-ios/debug/deps/libstd-e730827ac25e8eb8.rlib[10](std-e730827ac25e8eb8.std.390e242b97fa85e2-cgu.07.rcgu.o)': found architecture 'arm64e.old', required architecture 'arm64e'
          ld: warning: ignoring file '$PROJECT/target/arm64e-apple-ios/debug/deps/libstd-e730827ac25e8eb8.rlib[9](std-e730827ac25e8eb8.std.390e242b97fa85e2-cgu.06.rcgu.o)': found architecture 'arm64e.old', required architecture 'arm64e'
          ld: warning: ignoring file '$PROJECT/target/arm64e-apple-ios/debug/deps/libstd-e730827ac25e8eb8.rlib[8](std-e730827ac25e8eb8.std.390e242b97fa85e2-cgu.05.rcgu.o)': found architecture 'arm64e.old', required architecture 'arm64e'
          ld: warning: ignoring file '$PROJECT/target/arm64e-apple-ios/debug/deps/libstd-e730827ac25e8eb8.rlib[7](std-e730827ac25e8eb8.std.390e242b97fa85e2-cgu.04.rcgu.o)': found architecture 'arm64e.old', required architecture 'arm64e'
          ld: warning: ignoring file '$PROJECT/target/arm64e-apple-ios/debug/deps/libstd-e730827ac25e8eb8.rlib[6](std-e730827ac25e8eb8.std.390e242b97fa85e2-cgu.03.rcgu.o)': found architecture 'arm64e.old', required architecture 'arm64e'
          ld: warning: ignoring file '$PROJECT/target/arm64e-apple-ios/debug/deps/libstd-e730827ac25e8eb8.rlib[5](std-e730827ac25e8eb8.std.390e242b97fa85e2-cgu.02.rcgu.o)': found architecture 'arm64e.old', required architecture 'arm64e'
          ld: warning: ignoring file '$PROJECT/target/arm64e-apple-ios/debug/deps/libstd-e730827ac25e8eb8.rlib[4](std-e730827ac25e8eb8.std.390e242b97fa85e2-cgu.01.rcgu.o)': found architecture 'arm64e.old', required architecture 'arm64e'
          ld: warning: ignoring file '$PROJECT/target/arm64e-apple-ios/debug/deps/libstd-e730827ac25e8eb8.rlib[3](std-e730827ac25e8eb8.std.390e242b97fa85e2-cgu.00.rcgu.o)': found architecture 'arm64e.old', required architecture 'arm64e'
          ld: warning: ignoring file '$PROJECT/target/arm64e-apple-ios/debug/deps/libstd-e730827ac25e8eb8.rlib[2](lib.rmeta)': found architecture 'arm64e.old', required architecture 'arm64e'
          ld: warning: ignoring file '$PROJECT/target/arm64e-apple-ios/debug/deps/liballoc-85c3b697c47ff844.rlib[5](alloc-85c3b697c47ff844.alloc.2bb4af1538dd142e-cgu.2.rcgu.o)': found architecture 'arm64e.old', required architecture 'arm64e'
          ld: warning: ignoring file '$PROJECT/target/arm64e-apple-ios/debug/deps/liballoc-85c3b697c47ff844.rlib[4](alloc-85c3b697c47ff844.alloc.2bb4af1538dd142e-cgu.1.rcgu.o)': found architecture 'arm64e.old', required architecture 'arm64e'
          ld: warning: ignoring file '$PROJECT/target/arm64e-apple-ios/debug/deps/liballoc-85c3b697c47ff844.rlib[3](alloc-85c3b697c47ff844.alloc.2bb4af1538dd142e-cgu.0.rcgu.o)': found architecture 'arm64e.old', required architecture 'arm64e'
          ld: warning: ignoring file '$PROJECT/target/arm64e-apple-ios/debug/deps/liballoc-85c3b697c47ff844.rlib[2](lib.rmeta)': found architecture 'arm64e.old', required architecture 'arm64e'
          ld: warning: ignoring file '$PROJECT/target/arm64e-apple-ios/debug/deps/libcore-8349edf93c8d5e6a.rlib[18](core-8349edf93c8d5e6a.core.b68d8c8fce132d46-cgu.15.rcgu.o)': found architecture 'arm64e.old', required architecture 'arm64e'
          ld: warning: ignoring file '$PROJECT/target/arm64e-apple-ios/debug/deps/libcore-8349edf93c8d5e6a.rlib[17](core-8349edf93c8d5e6a.core.b68d8c8fce132d46-cgu.14.rcgu.o)': found architecture 'arm64e.old', required architecture 'arm64e'
          ld: warning: ignoring file '$PROJECT/target/arm64e-apple-ios/debug/deps/libcore-8349edf93c8d5e6a.rlib[16](core-8349edf93c8d5e6a.core.b68d8c8fce132d46-cgu.13.rcgu.o)': found architecture 'arm64e.old', required architecture 'arm64e'
          ld: warning: ignoring file '$PROJECT/target/arm64e-apple-ios/debug/deps/libcore-8349edf93c8d5e6a.rlib[15](core-8349edf93c8d5e6a.core.b68d8c8fce132d46-cgu.12.rcgu.o)': found architecture 'arm64e.old', required architecture 'arm64e'
          ld: warning: ignoring file '$PROJECT/target/arm64e-apple-ios/debug/deps/libcore-8349edf93c8d5e6a.rlib[14](core-8349edf93c8d5e6a.core.b68d8c8fce132d46-cgu.11.rcgu.o)': found architecture 'arm64e.old', required architecture 'arm64e'
          ld: warning: ignoring file '$PROJECT/target/arm64e-apple-ios/debug/deps/libcore-8349edf93c8d5e6a.rlib[13](core-8349edf93c8d5e6a.core.b68d8c8fce132d46-cgu.10.rcgu.o)': found architecture 'arm64e.old', required architecture 'arm64e'
          ld: warning: ignoring file '$PROJECT/target/arm64e-apple-ios/debug/deps/libcore-8349edf93c8d5e6a.rlib[12](core-8349edf93c8d5e6a.core.b68d8c8fce132d46-cgu.09.rcgu.o)': found architecture 'arm64e.old', required architecture 'arm64e'
          ld: warning: ignoring file '$PROJECT/target/arm64e-apple-ios/debug/deps/libcore-8349edf93c8d5e6a.rlib[11](core-8349edf93c8d5e6a.core.b68d8c8fce132d46-cgu.08.rcgu.o)': found architecture 'arm64e.old', required architecture 'arm64e'
          ld: warning: ignoring file '$PROJECT/target/arm64e-apple-ios/debug/deps/libcore-8349edf93c8d5e6a.rlib[10](core-8349edf93c8d5e6a.core.b68d8c8fce132d46-cgu.07.rcgu.o)': found architecture 'arm64e.old', required architecture 'arm64e'
          ld: warning: ignoring file '$PROJECT/target/arm64e-apple-ios/debug/deps/libcore-8349edf93c8d5e6a.rlib[9](core-8349edf93c8d5e6a.core.b68d8c8fce132d46-cgu.06.rcgu.o)': found architecture 'arm64e.old', required architecture 'arm64e'
          ld: warning: ignoring file '$PROJECT/target/arm64e-apple-ios/debug/deps/libcore-8349edf93c8d5e6a.rlib[8](core-8349edf93c8d5e6a.core.b68d8c8fce132d46-cgu.05.rcgu.o)': found architecture 'arm64e.old', required architecture 'arm64e'
          ld: warning: ignoring file '$PROJECT/target/arm64e-apple-ios/debug/deps/libcore-8349edf93c8d5e6a.rlib[7](core-8349edf93c8d5e6a.core.b68d8c8fce132d46-cgu.04.rcgu.o)': found architecture 'arm64e.old', required architecture 'arm64e'
          ld: warning: ignoring file '$PROJECT/target/arm64e-apple-ios/debug/deps/libcore-8349edf93c8d5e6a.rlib[6](core-8349edf93c8d5e6a.core.b68d8c8fce132d46-cgu.03.rcgu.o)': found architecture 'arm64e.old', required architecture 'arm64e'
          ld: warning: ignoring file '$PROJECT/target/arm64e-apple-ios/debug/deps/libcore-8349edf93c8d5e6a.rlib[5](core-8349edf93c8d5e6a.core.b68d8c8fce132d46-cgu.02.rcgu.o)': found architecture 'arm64e.old', required architecture 'arm64e'
          ld: warning: ignoring file '$PROJECT/target/arm64e-apple-ios/debug/deps/libcore-8349edf93c8d5e6a.rlib[4](core-8349edf93c8d5e6a.core.b68d8c8fce132d46-cgu.01.rcgu.o)': found architecture 'arm64e.old', required architecture 'arm64e'
          ld: warning: ignoring file '$PROJECT/target/arm64e-apple-ios/debug/deps/libcore-8349edf93c8d5e6a.rlib[3](core-8349edf93c8d5e6a.core.b68d8c8fce132d46-cgu.00.rcgu.o)': found architecture 'arm64e.old', required architecture 'arm64e'
          ld: warning: ignoring file '$PROJECT/target/arm64e-apple-ios/debug/deps/libcore-8349edf93c8d5e6a.rlib[2](lib.rmeta)': found architecture 'arm64e.old', required architecture 'arm64e'
          Undefined symbols for architecture arm64e:
            "_main", referenced from:
                <initial-undefines>
          ld: symbol(s) not found for architecture arm64e
          clang: error: linker command failed with exit code 1 (use -v to see invocation)
```

I feel fairly confident that we're passing the right arguments to the linker nowadays (this happens even with https://github.com/rust-lang/rust/pull/129369), so I suspect it's the object files that we generate that's the problem somehow, but I may be mistaken?

### Meta

`rustc +nightly --version --verbose`:
```
rustc 1.83.0-nightly (26b5599e4 2024-09-06)
binary: rustc
commit-hash: 26b5599e4d6ed2b45152c60493c1788c0a27533d
commit-date: 2024-09-06
host: aarch64-apple-darwin
release: 1.83.0-nightly
LLVM version: 19.1.0
```

Happens as far back as `+nightly-2023-11-22`, the day after [the PR introducing these](https://github.com/rust-lang/rust/pull/115526) merged, so it's definitely due to changes in Xcode, not because of a regression in `rustc`.

@rustbot label O-ios O-macos O-AArch64

CC target maintainer @arttet.