1 files changed, 1 insertions, 16 deletions
diff --git a/lib/rubygems/ext/cargo_builder.rb b/lib/rubygems/ext/cargo_builder.rb
index 86a0e73f28..09ad1407c2 100644
--- a/lib/rubygems/ext/cargo_builder.rb
+++ b/lib/rubygems/ext/cargo_builder.rb
@@ -184,6 +184,7 @@ class Gem::Ext::CargoBuilder < Gem::Ext::Builder
   end
 
   def cargo_dylib_path(dest_path, crate_name)
+    so_ext = RbConfig::CONFIG["SOEXT"]
     prefix = so_ext == "dll" ? "" : "lib"
     path_parts = [dest_path]
     path_parts << ENV["CARGO_BUILD_TARGET"] if ENV["CARGO_BUILD_TARGET"]
@@ -312,22 +313,6 @@ EOF
     deffile_path
   end
 
-  # We have to basically reimplement <code>RbConfig::CONFIG['SOEXT']</code> here to support
-  # Ruby < 2.5
-  #
-  # @see https://github.com/ruby/ruby/blob/c87c027f18c005460746a74c07cd80ee355b16e4/configure.ac#L3185
-  def so_ext
-    return RbConfig::CONFIG["SOEXT"] if RbConfig::CONFIG.key?("SOEXT")
-
-    if win_target?
-      "dll"
-    elsif darwin_target?
-      "dylib"
-    else
-      "so"
-    end
-  end
-
   # Corresponds to $(LIBPATH) in mkmf
   def mkmf_libpath
     ["-L", "native=#{makefile_config("libdir")}"]