From 1000565c3a2439c9a7c9759284814dbf3b8bc20d Mon Sep 17 00:00:00 2001
From: Bram Moolenaar <Bram@vim.org>
Date: Thu, 31 Dec 2015 21:03:23 +0100
Subject: patch 7.4.1012 Problem:    Vim overwrites the value of $PYTHONHOME.
 Solution:   Do not set $PYTHONHOME if it is already set. (Kazuki Sakamoto,   
          closes #500)

---
 src/if_python3.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

(limited to 'src/if_python3.c')

diff --git a/src/if_python3.c b/src/if_python3.c
index 721e3cc5bb..387b811f61 100644
--- a/src/if_python3.c
+++ b/src/if_python3.c
@@ -858,7 +858,10 @@ Python3_Init(void)
 
 
 #ifdef PYTHON3_HOME
-	Py_SetPythonHome(PYTHON3_HOME);
+# ifdef DYNAMIC_PYTHON3
+	if (mch_getenv((char_u *)"PYTHONHOME") == NULL)
+# endif
+	    Py_SetPythonHome(PYTHON3_HOME);
 #endif
 
 	PyImport_AppendInittab("vim", Py3Init_vim);
-- 
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