diff --git a/lib/mkmf.rb b/lib/mkmf.rb
index 04b5f26a5e..f4dc191d76 100644
--- a/lib/mkmf.rb
+++ b/lib/mkmf.rb
@@ -1089,7 +1089,12 @@ def find_library(lib, func, *paths, &b)
   #
   def have_func(func, headers = nil, opt = "", &b)
     checking_for checking_message(func.funcall_style, headers, opt) do
-      if try_func(func, $libs, headers, opt, &b)
+      if func.start_with?('rb_') && !RbConfig::CONFIG["LIBRUBYARG"].include?('-lruby')
+        # HACK: Assume calling to check for methods that are already defined.
+        #       Cannot test as there is no libruby to link against.
+        $defs << "-DHAVE_#{func.sans_arguments.tr_cpp}"
+        true
+      elsif try_func(func, $libs, headers, opt, &b)
         $defs << "-DHAVE_#{func.sans_arguments.tr_cpp}"
         true
       else
diff --git a/tool/mkconfig.rb b/tool/mkconfig.rb
index 6db60724e9..297fd690fa 100755
--- a/tool/mkconfig.rb
+++ b/tool/mkconfig.rb
@@ -30,6 +30,7 @@
 install_name = nil
 so_name = nil
 platform = nil
+disable_install_static_library = nil
 File.foreach "config.status" do |line|
   next if /^#/ =~ line
   name = nil
@@ -110,6 +111,9 @@
     eq = win32 && vars[name] ? '<< "\n"' : '='
     vars[name] = val
     if name == "configure_args"
+      if val.include?('--disable-install-static-library')
+        disable_install_static_library = true
+      end
       val.gsub!(/--with-out-ext/, "--without-ext")
     end
     val = val.gsub(/\$(?:\$|\{?(\w+)\}?)/) {$1 ? "$(#{$1})" : $&}.dump
@@ -126,6 +130,10 @@
       end
     when /^includedir$/
       val = '"$(SDKROOT)"'+val if /darwin/ =~ arch
+    when /^LIBRUBYARG_STATIC$/
+      if disable_install_static_library
+        val.sub!('-l$(RUBY_SO_NAME)-static ', '')
+      end
     end
     v = "  CONFIG[\"#{name}\"] #{eq} #{val}\n"
     if fast[name]