Allow disable RandomX support.

src/workers/MultiWorker.cpp

@@ -39,11 +39,13 @@ MultiWorker<N>::MultiWorker(ThreadHandle *handle)
 {
     m_memory = Mem::create(m_ctx, m_thread->algorithm(), N);
 
+#   ifdef XMRIG_ALGO_RANDOMX
     const int flags = RANDOMX_FLAG_LARGE_PAGES | RANDOMX_FLAG_HARD_AES | RANDOMX_FLAG_FULL_MEM | RANDOMX_FLAG_JIT;
     m_rx_vm = randomx_create_vm(static_cast<randomx_flags>(flags), nullptr, Workers::getDataset());
     if (!m_rx_vm) {
         m_rx_vm = randomx_create_vm(static_cast<randomx_flags>(flags - RANDOMX_FLAG_LARGE_PAGES), nullptr, Workers::getDataset());
     }
+#   endif
 }
 
 
@@ -51,7 +53,10 @@ template<size_t N>
 MultiWorker<N>::~MultiWorker()
 {
     Mem::release(m_ctx, N, m_memory);
+
+#   ifdef XMRIG_ALGO_RANDOMX
     randomx_destroy_vm(m_rx_vm);
+#   endif
 }
 
 
@@ -134,11 +139,15 @@ void MultiWorker<N>::start()
             }
 
             const xmrig::Variant v = m_state.job.algorithm().variant();
+
+#           ifdef XMRIG_ALGO_RANDOMX
             if (v == xmrig::VARIANT_RX_WOW) {
                 Workers::updateDataset(m_state.job.seed_hash(), m_totalWays);
                 randomx_calculate_hash(m_rx_vm, m_state.blob, m_state.job.size(), m_hash);
             }
-            else {
+            else
+#           endif
+            {
                 m_thread->fn(v)(m_state.blob, m_state.job.size(), m_hash, m_ctx, m_state.job.height());
             }