using typedef intput argument for function

This is because of the strong typing in VHDL.

The int_array type in the function_list package is not the same type as the one you declared in the "main" entity.

Hence the missmatch when you call the sum function, as data is int_array, while the function wants work.function_list.int_array

The fix here is to remove the type declaration from the main file. You dont need it as it is already declared in the included function_list package.

note: VHDL 2008 includes the integer_vector type that is an array of integers.