From f53ce0112552166df728bafce57739756a304108 Mon Sep 17 00:00:00 2001
From: Christophe Lyon <christophe.lyon@linaro.org>
Date: Mon, 1 Oct 2018 21:16:40 +0000
Subject: [PATCH] Define _COMPILING_NEWLIB on aarch64 to define function
 prototypes from unistd.h.

    2018-10-01  Christophe Lyon  <christophe.lyon@linaro.org>

    	* newlib/configure.host: Define _COMPILING_NEWLIB for aarch64.
---
 newlib/configure.host | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/newlib/configure.host b/newlib/configure.host
index c5b773465..9e809c9a8 100644
--- a/newlib/configure.host
+++ b/newlib/configure.host
@@ -438,6 +438,9 @@ case "${host}" in
 	sys_dir=a29khif
 	signal_dir=
 	;;
+  aarch64*-*-*)
+	newlib_cflags="${newlib_cflags} -D_COMPILING_NEWLIB"
+	;;
   arm*-*-*)
 	newlib_cflags="${newlib_cflags} -D_COMPILING_NEWLIB"
 	sys_dir=arm