Update CMakeLists.txt

Utilities/DataHelper/CMakeLists.txt

@@ -6,9 +6,7 @@ find_package(GSL REQUIRED )
 message("GSL: ${GSL_LIBRARIES} ")
 message("GSL INCLUDE_DIRS: ${GSL_INCLUDE_DIRS} ")
 
-INCLUDE_DIRECTORIES(${GSL_INCLUDE_DIRS})
-
-gaudi_depends_on_subdirs()
+# gaudi_depends_on_subdirs()
 
 set(DataHelperLib_srcs src/*.cc src/*.cpp)
 
@@ -16,6 +14,6 @@ set(DataHelperLib_srcs src/*.cc src/*.cpp)
 
 gaudi_add_library(DataHelperLib ${DataHelperLib_srcs}
     PUBLIC_HEADERS DataHelper
-    INCLUDE_DIRECTORY ${CLHEP_INCLUDE_DIR}
+    INCLUDE_DIRS ${CLHEP_INCLUDE_DIR} ${GSL_INCLUDE_DIRS}
     LINK_LIBRARIES EDM4HEP::edm4hep EDM4HEP::edm4hepDict ${GSL_LIBRARIES} ${CLHEP_LIBRARIES}
 )