From e2f13430be3c74fade1319b97f6d21641152c732 Mon Sep 17 00:00:00 2001
From: Chris Johns <chrisj@rtems.org>
Date: Sat, 2 Feb 2019 15:19:59 +1100
Subject: [PATCH] libdl: Fix dlerror non-conformance

Closes #3298
---
 cpukit/libdl/dlfcn.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/cpukit/libdl/dlfcn.c b/cpukit/libdl/dlfcn.c
index 1d7164539b..b97078cbaa 100644
--- a/cpukit/libdl/dlfcn.c
+++ b/cpukit/libdl/dlfcn.c
@@ -129,7 +129,10 @@ const char*
 dlerror (void)
 {
   static char msg[64];
-  rtems_rtl_get_error (msg, sizeof (msg));
+  int         eno;
+  eno = rtems_rtl_get_error (msg, sizeof (msg));
+  if (eno == 0)
+    return NULL;
   return msg;
 }