From bceaffc7cc1c484a1bb353e1d8ac42d2e8e57f69 Mon Sep 17 00:00:00 2001
From: Benjamin Kramer <benny.kra@googlemail.com>
Date: Sun, 18 Apr 2010 09:16:04 +0000
Subject: [PATCH] Properly inherit the environment on darwin where environ is
 not available for shared libraries.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@101710 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/System/Unix/Program.inc | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/lib/System/Unix/Program.inc b/lib/System/Unix/Program.inc
index 7fdf3872dd9..b7b4e9eb469 100644
--- a/lib/System/Unix/Program.inc
+++ b/lib/System/Unix/Program.inc
@@ -34,6 +34,8 @@
 #include <spawn.h>
 #if !defined(__APPLE__)
   extern char **environ;
+#else
+#include <crt_externs.h> // _NSGetEnviron
 #endif
 #endif
 
@@ -202,8 +204,11 @@ Program::Execute(const Path &path, const char **args, const char **envp,
       }
     }
 
+    if (!envp)
 #if !defined(__APPLE__)
-    if (!envp) envp = (const char**)environ;
+      envp = (const char**)environ;
+#else
+      envp = (const char**)*_NSGetEnviron(); // environ is missing in dylibs.
 #endif
 
     pid_t PID;