From 801fc060618bcfcf3b84edfd535bab641ceb7097 Mon Sep 17 00:00:00 2001
From: Simon John <git@the-jedi.co.uk>
Date: Mon, 19 May 2014 22:09:00 +0100
Subject: [PATCH] Check that on windows ARDUINO_DIR (and MPIDE_DIR) is a
 relative path.

Checks for paths starting with / e.g. /cydrive/arduino or a
drive letter e.g. C:\Program Files\Arduino
---
 Arduino.mk | 6 ++++++
 chipKIT.mk | 6 ++++++
 2 files changed, 12 insertions(+)

diff --git a/Arduino.mk b/Arduino.mk
index a352628..42dfef0 100644
--- a/Arduino.mk
+++ b/Arduino.mk
@@ -279,6 +279,12 @@ else
     $(call show_config_variable,ARDUINO_DIR,[USER])
 endif
 
+ifeq ($(CURRENT_OS),WINDOWS)
+    ifneq ($(shell echo $(ARDUINO_DIR) | egrep '^(/|[a-zA-Z]:\\)'),)
+        echo $(error On Windows, ARDUINO_DIR must be a relative path)
+    endif
+endif
+
 ########################################################################
 # Default TARGET to pwd (ex Daniele Vergini)
 
diff --git a/chipKIT.mk b/chipKIT.mk
index 19a4a4a..06d85e3 100644
--- a/chipKIT.mk
+++ b/chipKIT.mk
@@ -47,6 +47,12 @@ else
     $(call show_config_variable,MPIDE_DIR,[USER])
 endif
 
+ifeq ($(CURRENT_OS),WINDOWS)
+    ifneq ($(shell echo $(ARDUINO_DIR) | egrep '^(/|[a-zA-Z]:\\)'),)
+        echo $(error On Windows, MPIDE_DIR must be a relative path)
+    endif
+endif
+
 ifndef MPIDE_PREFERENCES_PATH
     AUTO_MPIDE_PREFERENCES_PATH := $(firstword \
         $(call dir_if_exists,$(HOME)/.mpide/preferences.txt) \