From 1cab0c168e57816a6391c77e86330c73e786aa92 Mon Sep 17 00:00:00 2001
From: Ivan Kravets <me@ikravets.com>
Date: Wed, 15 Jun 2016 18:42:56 +0300
Subject: [PATCH] Fix issue with appending PIO version to Build Defines

---
 platformio/builder/tools/platformio.py | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/platformio/builder/tools/platformio.py b/platformio/builder/tools/platformio.py
index 77d1f60e..01b50f57 100644
--- a/platformio/builder/tools/platformio.py
+++ b/platformio/builder/tools/platformio.py
@@ -36,7 +36,9 @@ SRC_DEFAULT_FILTER = " ".join([
 def BuildProgram(env):
 
     def _append_pio_macros():
-        env.AppendUnique(
+        if any(["PLATFORMIO=" in str(d) for d in env.get("CPPDEFINES", [])]):
+            return
+        env.Append(
             CPPDEFINES=["PLATFORMIO={0:02d}{1:02d}{2:02d}".format(
                 *pioversion_to_intstr())],
         )