Update geom/geocad CMakeLists.txt

* List all headers and sources
* Restrict includes to target
* Avoid shadow and extra warnings from OpenCascade

geom/geocad/CMakeLists.txt

@@ -3,12 +3,27 @@
 # @author Pere Mato, CERN
 ############################################################################
 
-include_directories(${OCC_INCLUDE_DIR})
-
-ROOT_ADD_CXX_FLAG(CMAKE_CXX_FLAGS -Wno-overloaded-virtual)
-ROOT_ADD_CXX_FLAG(CMAKE_CXX_FLAGS -Wno-ignored-qualifiers)
+ROOT_STANDARD_LIBRARY_PACKAGE(GeoCad
+  HEADERS
+    TGeoToOCC.h
+    TGeoToStep.h
+    TOCCToStep.h
+  SOURCES
+    TGeoToOCC.cxx
+    TGeoToStep.cxx
+    TOCCToStep.cxx
+  DICTIONARY_OPTIONS
+    -I${OCC_INCLUDE_DIR}
+  DEPENDENCIES
+    Geom
+)
 
+ROOT_ADD_CXX_FLAG(_GeoCad_FLAGS -Wno-extra)
+ROOT_ADD_CXX_FLAG(_GeoCad_FLAGS -Wno-ignored-qualifiers)
+ROOT_ADD_CXX_FLAG(_GeoCad_FLAGS -Wno-overloaded-virtual)
+ROOT_ADD_CXX_FLAG(_GeoCad_FLAGS -Wno-shadow)
+separate_arguments(_GeoCad_FLAGS)
 
-ROOT_STANDARD_LIBRARY_PACKAGE(GeoCad
-                              LIBRARIES ${OCC_LIBRARIES}
-                              DEPENDENCIES Geom)
+target_compile_options(GeoCad PRIVATE ${_GeoCad_FLAGS})
+target_link_libraries(GeoCad PUBLIC ${OCC_LIBRARIES})
+target_include_directories(GeoCad PUBLIC ${OCC_INCLUDE_DIR})