preparations for object_generator (generating objects with attributes and constraints)

demo/CMakeLists.txt

@@ -1,4 +1,5 @@
-add_executable(demo main.cpp)
+add_executable(demo main.cpp
+  object.cpp)
 target_link_libraries(demo PRIVATE
   matador-core
   matador-orm
@@ -23,3 +24,9 @@ target_link_libraries(work PRIVATE
 )
 
 add_dependencies(work matador-postgres)
+
+add_executable(object object.cpp)
+target_link_libraries(object PRIVATE
+  matador-core
+  ${CMAKE_DL_LIBS}
+)