We can't rely on DISABLE_SHARED:

- When Ruby 3.1.7 gets picked up as the runtime ruby for creating fat
  gems, it will have the `ENABLE_SHARED=no`. That's because the
  ruby/ruby-builder repository didn't enable the `--enable-shared`
  flag during compilation.

  The issue is that because its set to "no", then we don't rewrite
  Makefiles, which causes issues because other Rubies that are getting
  compiled have the flag enabled.

Author: Edouard-chin

lib/easy_compile/compilation_tasks.rb

@@ -79,7 +79,7 @@ def define_task(path)
         ext.cross_compile = true
       end
 
-      disable_shared if darwin? && shared_enabled?
+      disable_shared if darwin?
     ensure
       self.binary_name = nil
     end
@@ -95,10 +95,6 @@ def darwin?
       Gem::Platform.local.os == "darwin"
     end
 
-    def shared_enabled?
-      RbConfig::CONFIG["ENABLE_SHARED"] == "yes"
-    end
-
     def disable_shared
       makefile_tasks = Rake::Task.tasks.select { |task| task.name =~ /Makefile/ }