adding option whether user want's to compile SDDS tools

tools/CMakeLists.txt

-FIND_PACKAGE(SDDS)
+OPTION (ENABLE_SDDSTOOLS "Compile conversion tools for SDDS to Opal and vice-versa")
 
-IF(SDDS_FOUND)
-    ADD_SUBDIRECTORY(sdds2opal)
-    ADD_SUBDIRECTORY(opal2sdds)
-ENDIF(SDDS_FOUND)
+IF (ENABLE_SDDSTOOLS)
+    FIND_PACKAGE(SDDS REQUIRED)
+
+    IF(SDDS_FOUND)
+        ADD_SUBDIRECTORY(sdds2opal)
+        ADD_SUBDIRECTORY(opal2sdds)
+    ENDIF(SDDS_FOUND)
+ENDIF(ENABLE_SDDSTOOLS)
 
 #ADD_SUBDIRECTORY(SDDSReader)
 OPTION (ENABLE_MSLANG "Compile MSLang stand-alone compiler" OFF)
 
 if (ENABLE_MSLANG)
     ADD_SUBDIRECTORY(mslang)
-endif(ENABLE_MSLANG)
\ No newline at end of file
+endif(ENABLE_MSLANG)