From 08baac348c9aeb30ebb5c5a48abfb1b9f46767de Mon Sep 17 00:00:00 2001
From: Tom Cherry <tomcherry@google.com>
Date: Mon, 5 Aug 2019 14:45:57 -0700
Subject: [PATCH] Remove now unneeded #undef in __cxa_guard.cpp

Before aosp/1086558, this was needed, since we would have
_USING_LIBCXX defined, yet <atomic> was not available, so we'd run
into compiler issues.  After that change, we're using
__has_include(<atomic>) so this is no longer an issue.

Test: build
Change-Id: Ia81d343000e7d90f07422120fc1e1eb5becb01aa
---
 libc/bionic/__cxa_guard.cpp | 2 --
 1 file changed, 2 deletions(-)

diff --git a/libc/bionic/__cxa_guard.cpp b/libc/bionic/__cxa_guard.cpp
index 30b5f41bd..e2e747791 100644
--- a/libc/bionic/__cxa_guard.cpp
+++ b/libc/bionic/__cxa_guard.cpp
@@ -16,9 +16,7 @@
 
 #include <endian.h>
 #include <limits.h>
-#undef _USING_LIBCXX  // Prevent using of <atomic>.
 #include <stdatomic.h>
-
 #include <stddef.h>
 
 #include "private/bionic_futex.h"