Added command line option --opencl.

src/core/config/ConfigTransform.h

@@ -42,6 +42,7 @@ private:
     void transformBoolean(rapidjson::Document &doc, int key, bool enable);
     void transformUint64(rapidjson::Document &doc, int key, uint64_t arg);
 
+    bool m_opencl           = false;
     int64_t m_affinity      = -1;
     uint64_t m_intensity    = 1;
     uint64_t m_threads      = 0;