diff --git a/config/config.constant-string-class.m b/config/config.constant-string-class.m
new file mode 100644
index 000000000..4f2474cd0
--- /dev/null
+++ b/config/config.constant-string-class.m
@@ -0,0 +1,61 @@
+/* Test that the compiler supports the -fconstant-string-class option
+   Copyright (C) 2001 Free Software Foundation, Inc.
+
+   Written by: Nicola Pero <nicola@brainstorm.co.uk>
+   Created: June 2001
+   
+   This file is part of the GNUstep Base Library.
+   
+   This program is free software; you can redistribute it and/or
+   modify it under the terms of the GNU General Public License
+   as published by the Free Software Foundation; either version 2
+   of the License, or (at your option) any later version.
+*/
+#ifdef NeXT_RUNTIME
+/* ignore this test with the NeXT runtime - never use
+   -fconstant-string-class */
+int main (int argc, char **argv)
+{
+  abort ();
+  return 1;
+}
+#else /* GNU RUNTIME - the real test */
+
+/* must be compiled compile using -fconstant-string-class=NSConstantString
+   as an option to gcc.  If it doesn't work, it means your gcc doesn't
+   support this option. */
+
+#include <objc/objc.h>
+#include <objc/Object.h>
+
+/* Define our custom constant string class */
+@interface NSConstantString : Object
+{
+   char *c_string;
+   unsigned int len;
+}
+- (char *) customString;
+@end
+  
+@implementation NSConstantString
+- (char *) customString
+{
+    return c_string;
+}
+@end
+  
+
+int main (int argc, char **argv)
+{
+   /* Create a test constant string */
+   NSConstantString *string = @"Antonio Valente";
+   
+   /* Check that it really works */
+   if (strcmp ([string customString], "Antonio Valente"))
+     {
+       abort ();
+     }
+   
+   return 0;
+}
+#endif /* GNU RUNTIME */