From 51a17a7a0fd543a5990d8f2345bf01ac34b4adab Mon Sep 17 00:00:00 2001
From: ThorstenB <brehmt@gmail.com>
Date: Sat, 7 Jul 2012 16:05:02 +0200
Subject: [PATCH] Suppress unnecessary "failed alias" warnings when requested
 alias matches existing alias anyway (identical aliases can be created on
 repeated sim resets)

---
 simgear/props/props.cxx | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/simgear/props/props.cxx b/simgear/props/props.cxx
index 26a6c85e..d690cbe6 100644
--- a/simgear/props/props.cxx
+++ b/simgear/props/props.cxx
@@ -797,9 +797,11 @@ SGPropertyNode::alias (SGPropertyNode * target)
   else
   if (_type == props::ALIAS)
   {
+    if (_value.alias == target)
+        return true; // ok, identical alias requested
     SG_LOG(SG_GENERAL, SG_ALERT,
            "Failed to create alias at " << target->getPath() << ". "
-           "Source "<< getPath() << " is also an alias. Unsupported recursion.");
+           "Source "<< getPath() << " is already aliasing another property.");
   }
   else
   if (_tied)
-- 
2.39.5