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build: Fix false positive CHECK_ATOMIC test for clang-15

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Github-Pull: #29859
Rebased-From: dd3e0fa125
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Hennadii Stepanov 2024-04-12 09:52:06 +02:00 committed by fanquake
parent 9277793b4e
commit 364bf01ff2
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1 changed files with 5 additions and 2 deletions
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7
build-aux/m4/l_atomic.m4
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@ -7,7 +7,7 @@ dnl warranty.
# Clang, when building for 32-bit,
# and linking against libstdc++, requires linking with
# -latomic if using the C++ atomic library.
# Can be tested with: clang++ test.cpp -m32
# Can be tested with: clang++ -std=c++20 test.cpp -m32
#
# Sourced from http://bugs.debian.org/797228
@ -27,8 +27,11 @@ m4_define([_CHECK_ATOMIC_testbody], [[
auto t1 = t.load();
t.compare_exchange_strong(t1, 3s);
std::atomic<int64_t> a{};
std::atomic<double> d{};
d.store(3.14);
auto d1 = d.load();
std::atomic<int64_t> a{};
int64_t v = 5;
int64_t r = a.fetch_add(v);
return static_cast<int>(r);