What were you trying to do that didn't work?

I am trying to build mysql8.4.5 for rhel8 but protobuf fails when building on rhel8 with:
In file included from /usr/include/google/protobuf/stubs/atomicops.h:217,
from /usr/include/google/protobuf/io/coded_stream.h:134,
from /builddir/build/BUILD/mysql-8.4.5/sql/protobuf/generated/protobuf_lite/replication_asynchronous_connection_failover.pb.h:22,
from /builddir/build/BUILD/mysql-8.4.5/sql/protobuf/generated/protobuf_lite/replication_asynchronous_connection_failover.pb.cc:4:
/usr/include/google/protobuf/stubs/atomicops_internals_generic_c11_atomic.h: In function 'void google::protobuf::internal::MemoryBarrierInternal()':
/usr/include/google/protobuf/stubs/atomicops_internals_generic_c11_atomic.h:59:30: error: cannot convert 'const std::memory_order' to 'int'
59 | __atomic_thread_fence(std::memory_order_seq_cst);

more info about the issue in this thread: https://redhat-internal.slack.com/archives/C04NH7K27H6/p1752585347291409

What is the impact of this issue to you?

Inability to build mysql8.4.5 on s390x. Working on a cmake patch but it isn't sustainable to maintain such a big cmake patch.

Please provide the package NVR for which the bug is seen:

protobuf-3.5.0-15

How reproducible is this bug?:

Every time

Steps to reproduce

1. Run a build of mysql8.4.5 on rhel8 for s390x

Expected results

Everything compiles successfully.

Actual results

The compilation fails with the abovementioned error.