make compact as a plugin interface

src/tsdb/CMakeLists.txt

@@ -6,6 +6,10 @@ AUX_SOURCE_DIRECTORY(src SRC)
 ADD_LIBRARY(tsdb ${SRC})
 TARGET_LINK_LIBRARIES(tsdb tfs common tutil)
 
+IF (TD_TSDB_PLUGINS)
+  TARGET_LINK_LIBRARIES(tsdb tsdbPlugins)
+ENDIF ()
+
 IF (TD_LINUX)
   # Someone has no gtest directory, so comment it
   # ADD_SUBDIRECTORY(tests)

src/tsdb/src/tsdbCompact.c

@@ -14,5 +14,9 @@
  */
 #include "tsdb.h"
 
+#ifndef _TSDB_PLUGINS
+
 int   tsdbCompact(STsdbRepo *pRepo) { return 0; }
-void *tsdbCompactImpl(STsdbRepo *pRepo) { return NULL; }
+void *tsdbCompactImpl(STsdbRepo *pRepo) { return NULL; }
+
+#endif