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Merge bitcoin/bitcoin#29859: build: Fix false positive CHECK_ATOMIC test

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dd3e0fa125 build: Fix false positive `CHECK_ATOMIC` test for clang-15 (Hennadii Stepanov)

Pull request description:

  On the master branch @ 0de63b8b46, a building `bitcoind` with clang-15 for `i686-pc-linux-gnu` fails to link:
  ```
    CXXLD    bitcoind
  /usr/bin/ld: libbitcoin_wallet.a(libbitcoin_wallet_a-wallet.o): in function `std::remove_volatile<double>::type std::__atomic_impl::load<double>(double const*, std::memory_order)':
  /usr/bin/../lib/gcc/x86_64-linux-gnu/11/../../../../include/c++/11/bits/atomic_base.h:948: undefined reference to `__atomic_load'
  /usr/bin/ld: libbitcoin_wallet.a(libbitcoin_wallet_a-wallet.o): in function `void std::__atomic_impl::store<double>(double*, std::remove_volatile<double>::type, std::memory_order)':
  /usr/bin/../lib/gcc/x86_64-linux-gnu/11/../../../../include/c++/11/bits/atomic_base.h:940: undefined reference to `__atomic_store'
  /usr/bin/ld: libbitcoin_wallet.a(libbitcoin_wallet_a-wallet.o): in function `void std::__atomic_impl::store<double>(double*, std::remove_volatile<double>::type, std::memory_order)':
  /usr/bin/../lib/gcc/x86_64-linux-gnu/11/../../../../include/c++/11/bits/atomic_base.h:940: undefined reference to `__atomic_store'
  /usr/bin/ld: /usr/bin/../lib/gcc/x86_64-linux-gnu/11/../../../../include/c++/11/bits/atomic_base.h:940: undefined reference to `__atomic_store'
  /usr/bin/ld: libbitcoin_wallet.a(libbitcoin_wallet_a-wallet.o): in function `std::remove_volatile<double>::type std::__atomic_impl::load<double>(double const*, std::memory_order)':
  /usr/bin/../lib/gcc/x86_64-linux-gnu/11/../../../../include/c++/11/bits/atomic_base.h:948: undefined reference to `__atomic_load'
  /usr/bin/ld: libbitcoin_wallet.a(libbitcoin_wallet_a-wallet.o): in function `void std::__atomic_impl::store<double>(double*, std::remove_volatile<double>::type, std::memory_order)':
  /usr/bin/../lib/gcc/x86_64-linux-gnu/11/../../../../include/c++/11/bits/atomic_base.h:940: undefined reference to `__atomic_store'
  /usr/bin/ld: libbitcoin_wallet.a(libbitcoin_wallet_a-backup.o): in function `void std::__atomic_impl::store<double>(double*, std::remove_volatile<double>::type, std::memory_order)':
  /usr/bin/../lib/gcc/x86_64-linux-gnu/11/../../../../include/c++/11/bits/atomic_base.h:940: undefined reference to `__atomic_store'
  /usr/bin/ld: /usr/bin/../lib/gcc/x86_64-linux-gnu/11/../../../../include/c++/11/bits/atomic_base.h:940: undefined reference to `__atomic_store'
  /usr/bin/ld: /usr/bin/../lib/gcc/x86_64-linux-gnu/11/../../../../include/c++/11/bits/atomic_base.h:940: undefined reference to `__atomic_store'
  /usr/bin/ld: /usr/bin/../lib/gcc/x86_64-linux-gnu/11/../../../../include/c++/11/bits/atomic_base.h:940: undefined reference to `__atomic_store'
  /usr/bin/ld: libbitcoin_wallet.a(libbitcoin_wallet_a-backup.o):/usr/bin/../lib/gcc/x86_64-linux-gnu/11/../../../../include/c++/11/bits/atomic_base.h:940: more undefined references to `__atomic_store' follow
  clang: error: linker command failed with exit code 1 (use -v to see invocation)
  ```

  due to false positive `CHECK_ATOMIC` test in the `configure` script.

  This PR fixes this test.

ACKs for top commit:
  maflcko:
    review ACK dd3e0fa125
  fanquake:
    ACK dd3e0fa125

Tree-SHA512: b60acf8d83fc84cc3280d95028395d341ed9ed2fcf38ae0a101d50aa19cc35540e9763aa36668c4dc1e1bc7e1f33dbda0e662df39c9e414a284ef91d7fc55fba
This commit is contained in:
merge-script 2024-04-17 14:00:40 +01:00
commit dd9007d5bd
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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);