Issue #19005 has been updated by stanhu (Stan Hu). A possible fix is to squelch this warning via `-no_fixup_chains`: ```diff diff --git a/configure.ac b/configure.ac index a2a0c1e387..d653a13bb8 100644 --- a/configure.ac +++ b/configure.ac @@ -3104,7 +3104,7 @@ AS_IF([test "$rb_cv_dlopen" = yes], [ AC_SUBST(ADDITIONAL_DLDFLAGS, "") for flag in \ "-multiply_defined suppress" \ - "-undefined dynamic_lookup" \ + "-no_fixup_chains -undefined dynamic_lookup" \ ; do test "x${linker_flag}" = x || flag="${linker_flag}`echo ${flag} | tr ' ' ,`" RUBY_TRY_LDFLAGS([$flag], [], [flag=]) ``` I should note that bazel dropped `-undefined dynamic_lookup` entirely in https://github.com/bazelbuild/bazel/issues/16413, but that will break some gems that are not ready for this. ---------------------------------------- Bug #19005: Ruby interpreter compiled XCode 14 cannot build some native gems on macOS https://bugs.ruby-lang.org/issues/19005#change-101132 * Author: stanhu (Stan Hu) * Status: Discussion * 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" ``` -- https://bugs.ruby-lang.org/