--- configure.old	2019-10-29 19:03:59.180923300 +0100
+++ configure	2019-06-13 23:36:49.711526900 +0200
@@ -28540,13 +28540,13 @@
 #ifdef __cplusplus
 extern "C"
 #endif
-char mng_create ();
 int
 main ()
 {
-return mng_create ();
-  ;
   return 0;
+
+
+
 }
 _ACEOF
 if ac_fn_c_try_link "$LINENO"; then :