[ruby-core:115896] [Ruby master Bug#19831] warning message of linker with macOS Sonoma beta

Issue #19831 has been updated by hsbt (Hiroshi SHIBATA).

Status changed from Closed to Open

This is still happend with latest version of Xcode.

```
linking ruby
ld: warning: ignoring duplicate libraries: '-ldl', '-lobjc', '-lpthread'
ruby: replacing existing signature
```

----------------------------------------
Bug #19831: warning message of linker with macOS Sonoma beta
https://bugs.ruby-lang.org/issues/19831#change-105852

* Author: hsbt (Hiroshi SHIBATA)
* Status: Open
* Priority: Normal
* Backport: 3.0: UNKNOWN, 3.1: UNKNOWN, 3.2: UNKNOWN
----------------------------------------
Xcode 15 beta and macOS Sonoma beta show the following warnings with `make`

```
(snip)
linking miniruby
ld: warning: ignoring duplicate library '-lpthread'
miniruby: replacing existing signature
exe/ruby: replacing existing signature
builtin_binary.inc updated
compiling builtin.c
linking static-library libruby.3.3-static.a
linking ruby
ld: warning: ignoring duplicate library '-lgmp'
ld: warning: ignoring duplicate library '-ldl'
ld: warning: ignoring duplicate library '-lobjc'
ld: warning: ignoring duplicate library '-lpthread'
ld: warning: ignoring duplicate library '-lpthread'
(snip)
```

I'm not investigate that yet. It may be caused by `ld-prime` that is new linker of macOS platform.


```
$ pkgutil --pkg-info=com.apple.pkg.CLTools_Executables
package-id: com.apple.pkg.CLTools_Executables
version: 15.0.0.0.1.1690355577
volume: /
location: /
install-time: 1690967267
```





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