Carlo Cabrera 1b12d74945

Pass -no_fixup_chains to linker when required ...

Invoking `ld` with `-undefined dynamic_lookup` emits a warning starting
Xcode 14:

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

Chained fixups is a linker optimisation that results in faster binary
load times, and is enabled by default starting Xcode 13 when the target
is macOS 12 or newer.

However, this interacts poorly with `-undefined dynamic_lookup`, and
Xcode will disable chained fixups when it is invoked with this flag
starting Xcode 14.3. Until then, we may be shipping binaries that are
broken in subtle ways, so let's disable chained fixups when necessary
instead.

I patterned the changes here after the handling of `-no_weak_imports`.
The only difference is that we need to check the flags that were passed
to the linker first to see if we do need to disable chained fixups.

For additional context, see:

https://developer.apple.com/documentation/xcode-release-notes/xcode-13-release-notes
https://www.wwdcnotes.com/notes/wwdc22/110362/
https://www.emergetools.com/blog/posts/iOS15LaunchTime
https://github.com/python/cpython/issues/97524
https://github.com/pybind/pybind11/pull/4301

2023-03-04 00:19:13 +08:00

..

shared.rb

extend/ENV/shared: use try.

2023-01-25 16:07:23 +00:00

shared.rbi

Add types for ENV extensions.

2020-11-23 02:06:37 +01:00

std.rb

brew style --fix

2023-01-02 19:18:51 +00:00

super.rb

Pass -no_fixup_chains to linker when required

2023-03-04 00:19:13 +08:00