From ff5b9f666073b37758ae0193f24d2cdb0ff6343d Mon Sep 17 00:00:00 2001
From: Cristian Maglie <c.maglie@arduino.cc>
Date: Wed, 28 Dec 2016 20:31:52 +0100
Subject: [PATCH] Consider sketchbook and bundled libraries folders only if
 they exists

---
 arduino-core/src/cc/arduino/Compiler.java | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/arduino-core/src/cc/arduino/Compiler.java b/arduino-core/src/cc/arduino/Compiler.java
index ddd0fad52..b5118fa1e 100644
--- a/arduino-core/src/cc/arduino/Compiler.java
+++ b/arduino-core/src/cc/arduino/Compiler.java
@@ -237,10 +237,8 @@ public class Compiler implements MessageConsumer {
     addPathFlagIfPathExists(cmd, "-tools", Paths.get(BaseNoGui.getHardwarePath(), "tools", "avr").toFile());
     addPathFlagIfPathExists(cmd, "-tools", installedPackagesFolder);
 
-    cmd.add("-built-in-libraries");
-    cmd.add(BaseNoGui.getContentFile("libraries").getAbsolutePath());
-    cmd.add("-libraries");
-    cmd.add(BaseNoGui.getSketchbookLibrariesFolder().getAbsolutePath());
+    addPathFlagIfPathExists(cmd, "-built-in-libraries", BaseNoGui.getContentFile("libraries"));
+    addPathFlagIfPathExists(cmd, "-libraries", BaseNoGui.getSketchbookLibrariesFolder());
 
     String fqbn = Stream.of(aPackage.getId(), platform.getId(), board.getId(), boardOptions(board)).filter(s -> !s.isEmpty()).collect(Collectors.joining(":"));
     cmd.add("-fqbn=" + fqbn);