Merge pull request #250587 from stephank/fix/couchdb

couchdb3: fix jiffy NIF on darwin

pkgs/servers/http/couchdb/3.nix

···
     substituteInPlace src/couch/rebar.config.script --replace '/usr/include/mozjs-91' "${spidermonkey_91.dev}/include/mozjs-91"
     substituteInPlace configure --replace '/usr/include/''${SM_HEADERS}' "${spidermonkey_91.dev}/include/mozjs-91"
     patchShebangs bin/rebar
+  '' + lib.optionalString stdenv.isDarwin ''
+    # LTO with Clang produces LLVM bitcode, which causes linking to fail quietly.
+    # (There are warnings, but no hard errors, and it produces an empty dylib.)
+    substituteInPlace src/jiffy/rebar.config.script --replace '"-flto"' '""'
   '';
 
   nativeBuildInputs = [