From 25f467ed78f7bf4a4523969b7e35ae770340bb94 Mon Sep 17 00:00:00 2001
From: Giacomo Travaglini <giacomo.travaglini@arm.com>
Date: Tue, 17 Jul 2018 10:42:06 +0100
Subject: base: Fix ucontext compilation error for macOS

ucontext functions (like getcontext, setcontext etc) have been marked
as deprecated and are hence hidden in latest macOS releases.
This patch uncovers them; warnings wil be produced but compilation
won't fail since -Wno-error=deprecated-declarations flag is currently
used.

Change-Id: Ic10e6f77a38875828b1891eaed2f0626ecffff67
Signed-off-by: Giacomo Travaglini <giacomo.travaglini@arm.com>
Reviewed-on: https://gem5-review.googlesource.com/11729
Reviewed-by: Jason Lowe-Power <jason@lowepower.com>
Maintainer: Jason Lowe-Power <jason@lowepower.com>
---
 src/base/fiber.hh | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/src/base/fiber.hh b/src/base/fiber.hh
index b9f0683a5..5f7285b29 100644
--- a/src/base/fiber.hh
+++ b/src/base/fiber.hh
@@ -30,7 +30,16 @@
 #ifndef __BASE_FIBER_HH__
 #define __BASE_FIBER_HH__
 
+// ucontext functions (like getcontext, setcontext etc) have been marked
+// as deprecated and are hence hidden in latest macOS releases.
+// By defining _XOPEN_SOURCE we make them available at compilation time.
+#if defined(__APPLE__) && defined(__MACH__)
+#define _XOPEN_SOURCE 600
 #include <ucontext.h>
+#undef _XOPEN_SOURCE
+#else
+#include <ucontext.h>
+#endif
 
 #include <cstddef>
 #include <cstdint>
-- 
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