From cd70aa47d24258afa5a6855c2d5d0570fd859d52 Mon Sep 17 00:00:00 2001
From: Tom Cherry <tomcherry@google.com>
Date: Mon, 5 Aug 2019 14:36:46 -0700
Subject: [PATCH] linker: Remove setting _USING_LIBCXX

As of aosp/1086558, stdatomic.h directly checks for the presence of
<atomic> instead of checking _USING_LIBCXX, so these lines are
obsolete.

Test: build
Change-Id: Icfdb47b3ad109421b3413041f3d3027e2c0b518e
---
 linker/Android.bp | 5 -----
 1 file changed, 5 deletions(-)

diff --git a/linker/Android.bp b/linker/Android.bp
index 5e7a921a4..bdb7c178a 100644
--- a/linker/Android.bp
+++ b/linker/Android.bp
@@ -177,11 +177,6 @@ cc_defaults {
         "-Wextra",
         "-Wunused",
         "-Werror",
-
-        // Define _USING_LIBCXX so <stdatomic.h> defers to the <atomic> header. When a Soong module
-        // uses the platform libc++, Soong automatically passes this macro, but the dynamic linker
-        // links against libc++ manually.
-        "-D_USING_LIBCXX",
     ],
 
     // TODO: split out the asflags.