From a04bd36273c9cedc168b655eb10c16eb96608201 Mon Sep 17 00:00:00 2001
From: Jonathan Wakely <jwakely@redhat.com>
Date: Fri, 2 Oct 2020 22:14:06 +0100
Subject: [PATCH] libstdc++: Change test to work without 64-bit atomics

This fixes a linker error for older ARM cores without 64-bit atomics.

libstdc++-v3/ChangeLog:

	* testsuite/29_atomics/atomic_float/value_init.cc: Use float
	instead of double so that __atomic_load_8 isn't needed.

(cherry picked from commit 324118378e4e26d9c0f86734af26538491c5c5fc)
---
 libstdc++-v3/testsuite/29_atomics/atomic_float/value_init.cc | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/libstdc++-v3/testsuite/29_atomics/atomic_float/value_init.cc b/libstdc++-v3/testsuite/29_atomics/atomic_float/value_init.cc
index 237c0dd13ed5..98c6b0c7d015 100644
--- a/libstdc++-v3/testsuite/29_atomics/atomic_float/value_init.cc
+++ b/libstdc++-v3/testsuite/29_atomics/atomic_float/value_init.cc
@@ -21,13 +21,13 @@
 #include <atomic>
 #include <testsuite_hooks.h>
 
-constexpr std::atomic<double> a;
+constexpr std::atomic<float> a;
 
 void
 test01()
 {
   VERIFY(a.load() == 0);
-  static_assert(std::is_nothrow_default_constructible_v<std::atomic<double>>);
+  static_assert(std::is_nothrow_default_constructible_v<std::atomic<float>>);
 }
 
 int
-- 
2.47.2