macOS linker warnings in macOS ventura

Turns out ld shipped with Xcode 14+ emits a warning when using -undefined dynamic_lookup.`

ld: warning: -undefined dynamic_lookup may not work with chained fixups

Some investigation reveals that in fact -undefined dynamic_lookup doesn't work when:

• Link a shared library with the option
• Link it with a program that uses the chained-fixup introduced from macOS 12 and iOS 15

This is because -undefined dynamic_lookup uses lazy-bindings and they won't be bound while dyld fixes-up by traversing chained-fixup info.

However, we build extension modules with as bundles (-bundle) and they are loaded only through
dlopen, so it's safe to use -undefined dynamic_lookup in theory. So the warning produced by ld64 is
likely to be a false-positive.

ld64 also provides the -bundle_loader <executable> option, which allows resolving symbols defined in the executable symbol table while linking. It behaves almost the same with -undefined dynamic_lookup, but it makes the following changes:

• Require that unresolved symbols among input objects must be defined in the executable.
• Lazy symbol binding will lookup only the symbol table of the bundle loader executable. (-undefined dynamic_lookup lookups all symbol tables as flat namespace)

See "New Features" subsection under "Linking" section for chained fixup
developer.apple.com/documentation/xcode-release-notes/xcode-13-release-notes for more information.

Also, check the same problem in ruby where most of this information is taken from.

Không có tệp, bài kiểm thử hoặc điểm vào nào được nêu tên. Hãy bắt đầu bằng cách xác định cấu hình trình liên kết của CPython cho các mô-đun mở rộng macOS và các chỗ sử dụng -undefined dynamic_lookup; so sánh hành vi hiện tại với tùy chọn -bundle_loader của ld64. Công việc được xem là hoàn tất khi cảnh báo Ventura/Xcode 14+ đã được xử lý mà không làm hỏng việc tải mô-đun mở rộng.