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():