From 076696cde1516cca5293e65c1e329b29ca3d36aa Mon Sep 17 00:00:00 2001
From: Ivan Kravets <me@ikravets.com>
Date: Wed, 29 Jul 2015 17:33:06 +0300
Subject: [PATCH] Use Linker cyclic option when deplibs exist

---
 platformio/builder/tools/platformio.py | 13 +++++++------
 1 file changed, 7 insertions(+), 6 deletions(-)

diff --git a/platformio/builder/tools/platformio.py b/platformio/builder/tools/platformio.py
index 3ea18f9f..a539cf42 100644
--- a/platformio/builder/tools/platformio.py
+++ b/platformio/builder/tools/platformio.py
@@ -43,12 +43,13 @@ def BuildFirmware(env):
         )
 
     # enable "cyclic reference" for linker
-    env.Prepend(
-        _LIBFLAGS="-Wl,--start-group "
-    )
-    env.Append(
-        _LIBFLAGS=" -Wl,--end-group"
-    )
+    if deplibs:
+        env.Prepend(
+            _LIBFLAGS="-Wl,--start-group "
+        )
+        env.Append(
+            _LIBFLAGS=" -Wl,--end-group"
+        )
 
     # Handle SRC_BUILD_FLAGS
     if getenv("PLATFORMIO_SRC_BUILD_FLAGS", None):