From 12799d0fc7dcff0dc95640b1efad0637ad011144 Mon Sep 17 00:00:00 2001
From: Herbert Valerio Riedel <hvr@gnu.org>
Date: Sun, 31 Jan 2016 16:54:04 +0100
Subject: Have Autoconf test for _NSGetEnviron presence

---
 configure.ac | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'configure.ac')

diff --git a/configure.ac b/configure.ac
index 5b6eb7c..fdc27e4 100644
--- a/configure.ac
+++ b/configure.ac
@@ -40,6 +40,10 @@ AC_CHECK_FUNCS([readdir_r])
 dnl not available on android so check for it
 AC_CHECK_FUNCS([telldir seekdir])
 
+dnl When available, _NSGetEnviron() (defined in <crt_externs.h>) is
+dnl the preferred way to access environ(7)
+AC_CHECK_FUNCS([_NSGetEnviron])
+
 dnl This is e.g. available as a GNU extension in glibc 2.11+
 AC_CHECK_DECLS([execvpe])
 AC_CHECK_FUNCS([execvpe])
-- 
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