From 26719dcfcea9c42edbf5ad4dc73d9819a1c36777 Mon Sep 17 00:00:00 2001
From: Michael Kerrisk <mtk.manpages@gmail.com>
Date: Fri, 9 Dec 2016 13:34:05 +0100
Subject: [PATCH] feature_test_macros.7: Note that "cc -pthread" defines
 _REENTRANT

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
---
 man7/feature_test_macros.7 | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/man7/feature_test_macros.7 b/man7/feature_test_macros.7
index 82502fb98..1deb8fd4d 100644
--- a/man7/feature_test_macros.7
+++ b/man7/feature_test_macros.7
@@ -560,6 +560,9 @@ or
 then
 .B _REENTRANT
 has no effect.
+
+This flag is automatically defined if one compiles with
+.IR "cc\ \-pthread" .
 .TP
 .B _THREAD_SAFE
 Synonym for the (deprecated)