From a346408e4e3e3f4e1163404b12fdf20bd321cde8 Mon Sep 17 00:00:00 2001
From: Patrick Gauvin <gauvin@hcs.ufl.edu>
Date: Sun, 26 Jun 2016 12:47:28 -0400
Subject: libdl: dlerror return NULL when no error

Updates #2747
---
 cpukit/libdl/dlfcn.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/cpukit/libdl/dlfcn.c b/cpukit/libdl/dlfcn.c
index 4277caf757..55ad97b753 100644
--- a/cpukit/libdl/dlfcn.c
+++ b/cpukit/libdl/dlfcn.c
@@ -132,6 +132,8 @@ dlerror (void)
   static char msg[64];
   rtems_rtl_get_error (msg, sizeof (msg));
   rtems_rtl_clear_error ();
+  if (msg[0] == '\0')
+    return NULL;
   return msg;
 }
 
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