[ruby-core:111714] [Ruby master Bug#19005] Ruby interpreter compiled XCode 14 cannot build some native gems on macOS

Issue #19005 has been updated by stanhu (Stan Hu).

Status changed from Discussion to Closed

Ok, I see this was reported in https://bugs.ruby-lang.org/issues/19082.

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Bug #19005: Ruby interpreter compiled XCode 14 cannot build some native gems on macOS
https://bugs.ruby-lang.org/issues/19005#change-101112

* Author: stanhu (Stan Hu)
* Status: Closed
* Priority: Normal
* ruby -v: ruby 2.7.6p219 (2022-04-12 revision 44c8bfa984) [arm64-darwin21]
* Backport: 2.7: DONE, 3.0: DONE, 3.1: DONE
----------------------------------------
This seems related to https://bugs.ruby-lang.org/issues/18912 and https://bugs.ruby-lang.org/issues/18981 .

Steps to reproduce:

1. Upgrade to XCode 14.
2. Compile a new Ruby interpreter. I used the version provided in https://github.com/ruby/ruby/pull/6297 with `./configure --prefix=/tmp/ruby --with-openssl-dir=$(brew --prefix openssl@1.1) --with-readline-dir=$(brew --prefix readline) --enable-shared`.
3. Confirm that `-Wl,-undefined,dynamic_lookup` is no longer available:

```
irb(main):001:0> RbConfig::CONFIG['DLDFLAGS']
=> "-Wl,-multiply_defined,suppress"
```

4. Ran `gem install pg_query` (`gem install ffi-yajl` will also fail).

Error:

```
linking shared-object pg_query/pg_query.bundle
Undefined symbols for architecture arm64:
  "Init_pg_query", referenced from:
     -exported_symbol[s_list] command line option
     (maybe you meant: _Init_pg_query)
ld: symbol(s) not found for architecture arm64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
```

I can workaround the problem by doing:

```
gem install pg_query -- --with-ldflags="-Wl,-undefined,dynamic_lookup"
```







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