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check whether "-latomic" is required for composite type, see src/mongo/bson/timestamp.h,
otherwise the build fails with:
> /usr/bin/x86_64-pc-linux-gnu-ld.bfd: build/gentoo/mongo/db/storage/wiredtiger/wiredtiger_record_store.o: in function `mongo::WiredTigerRecordStore::getEarliestOplogTimestamp(mongo::OperationContext*)':
> /usr/lib/gcc/x86_64-pc-linux-gnu/14/include/g++-v14/bits/atomic_base.h:1002:(.text+0x7da9): undefined reference to `__atomic_compare_exchange'
> clang++: error: linker command failed with exit code 1 (use -v to see invocation)
diff --git a/SConstruct b/SConstruct
index 2a32456..4cfb5fd 100644
--- a/SConstruct
+++ b/SConstruct
@@ -5369,10 +5369,33 @@ def doConfigure(myenv):
conf.AddTest("CheckStdAtomic", CheckStdAtomic)
+ def CheckTimestampAtomic(context, extra_message):
+ test_body = """
+ #include <atomic>
+ struct Timestamp { unsigned int t, i; };
+ template<typename T> struct AtomicWord { std::atomic<T> v; T compareAndSwap(T e, T n) { v.compare_exchange_strong(e,n); return e; } };
+ int main() {
+ AtomicWord<Timestamp> x;
+ Timestamp a{0,0}, b{1,1};
+ x.compareAndSwap(a,b);
+ return 0;
+ }
+ """
+
+ context.Message("Checking if AtomicWord<Timestamp> works{0}... ".format(extra_message))
+
+ ret = context.TryLink(textwrap.dedent(test_body), ".cpp")
+ context.Result(ret)
+ return ret
+
+ conf.AddTest("CheckTimestampAtomic", CheckTimestampAtomic)
+
def check_all_atomics(extra_message=''):
for t in ('int64_t', 'uint64_t', 'int32_t', 'uint32_t'):
if not conf.CheckStdAtomic(t, extra_message):
return False
+ if not conf.CheckTimestampAtomic(extra_message):
+ return False
return True
if not check_all_atomics():
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