From a38fcb7587d5be68656a7e9492617200249770c9 Mon Sep 17 00:00:00 2001
From: Elliott Hughes <enh@google.com>
Date: Wed, 28 Nov 2018 16:22:32 -0800
Subject: macOS: there's no <features.h> on the Mac.

---
 lib/portability.h | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

(limited to 'lib/portability.h')

diff --git a/lib/portability.h b/lib/portability.h
index 59430e1b..e6b542c4 100644
--- a/lib/portability.h
+++ b/lib/portability.h
@@ -20,9 +20,10 @@
 
 // This isn't in the spec, but it's how we determine what libc we're using.
 
-#include <features.h>
-
-// Types various replacement prototypes need
+// Types various replacement prototypes need.
+// This also lets us determine what libc we're using. Systems that
+// have <features.h> will transitively include it, and ones that don't --
+// macOS -- won't break.
 #include <sys/types.h>
 
 // Various constants old build environments might not have even if kernel does
-- 
cgit v1.2.3