--- /dev/null
+#ifndef OPENTRACING_MOCK_TRACER_SYMBOLS_H
+#define OPENTRACING_MOCK_TRACER_SYMBOLS_H
+
+#include <opentracing/config.h>
+
+#ifdef _MSC_VER
+// Export if this is our own source, otherwise import:
+#ifndef OPENTRACING_MOCK_TRACER_STATIC
+#ifdef OPENTRACING_MOCK_TRACER_EXPORTS
+#define OPENTRACING_MOCK_TRACER_API __declspec(dllexport)
+#else
+#define OPENTRACING_MOCK_TRACER_API __declspec(dllimport)
+#endif
+#endif
+#endif // _MSC_VER
+
+#ifndef OPENTRACING_MOCK_TRACER_API
+#define OPENTRACING_MOCK_TRACER_API
+#endif
+
+#endif // OPENTRACING_SYMBOLS_H