--- ext/raindrops/extconf.rb.orig	Wed Feb 22 13:17:45 2017
+++ ext/raindrops/extconf.rb	Wed Feb 22 13:18:16 2017
@@ -31,18 +31,6 @@ SRC
   if try_link(src)
     $defs.push(format("-DHAVE_GCC_ATOMIC_BUILTINS"))
     true
-  else
-    # some compilers still target 386 by default, but we need at least 486
-    # to run atomic builtins.
-    prev_cflags = $CFLAGS
-    $CFLAGS += " -march=i486 "
-    if try_link(src)
-      $defs.push(format("-DHAVE_GCC_ATOMIC_BUILTINS"))
-      true
-    else
-      prev_cflags = $CFLAGS
-      false
-    end
   end
 end or have_header('atomic_ops.h') or abort <<-SRC