From fe944285564a041a19c84e184fe3545dd71bda18 Mon Sep 17 00:00:00 2001
From: jbachorik <j.bachorik@gmail.com>
Date: Sun, 26 Aug 2018 19:55:41 +0200
Subject: [PATCH] Do not validate libs location if not provided. Fixes #347

---
 src/share/classes/com/sun/btrace/agent/Main.java | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/share/classes/com/sun/btrace/agent/Main.java b/src/share/classes/com/sun/btrace/agent/Main.java
index 88a2b8a78..e40ad01dc 100644
--- a/src/share/classes/com/sun/btrace/agent/Main.java
+++ b/src/share/classes/com/sun/btrace/agent/Main.java
@@ -534,7 +534,8 @@ private static void addPreconfLibs(String libs) {
                 if (Files.exists(libFolder)) {
                     appendToBootClassPath(libFolder);
                     appendToSysClassPath(libFolder);
-                } else {
+                } else if (libs != null) {
+                    // for user provided libs config report error if the location does not exist
                     DebugSupport.warning("Invalid 'libs' configuration [" + libs + "]. " +
                                  "Path '" + libFolder.toAbsolutePath().toString() + "' does not exist.");
                 }