From 99b8c76f52558a1522f8ecc9efef7b3633656c8a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Bj=C3=B6rn=20Gustavsson?= <bjorn@erlang.org>
Date: Tue, 15 Mar 2016 12:51:50 +0100
Subject: run_erl: Don't define _XOPEN_SOURCE on OS X

On MacOS X, defining _XOPEN_SOURCE usually *removes* features from
header files.

Therefore, we should not set _XOPEN_SOURCE to 600 since that will
remove the prototype for vsyslog(). Setting it to an empty value
or not including it will ensure that the vsyslog() prototype is
included.
---
 erts/etc/unix/run_erl.c | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

(limited to 'erts/etc/unix')

diff --git a/erts/etc/unix/run_erl.c b/erts/etc/unix/run_erl.c
index 44efb975ba..22302d539a 100644
--- a/erts/etc/unix/run_erl.c
+++ b/erts/etc/unix/run_erl.c
@@ -42,9 +42,14 @@
 #  include "config.h"
 #endif
 #ifdef HAVE_WORKING_POSIX_OPENPT
-#ifndef _XOPEN_SOURCE
-#define _XOPEN_SOURCE 600 
-#endif
+#  ifndef _XOPEN_SOURCE
+     /* On OS X, we must leave _XOPEN_SOURCE undefined in order for
+      * the prototype of vsyslog() to be included.
+      */
+#    ifndef __APPLE__
+#      define _XOPEN_SOURCE 600
+#    endif
+#  endif
 #endif
 #include <sys/types.h>
 #include <sys/wait.h>
-- 
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