"An implementation should support
Long_Integerin addition to
Integerif the target machine supports 32-bit (or longer) arithmetic. No other named integer subtypes are recommended for package
Standard. Instead, appropriate named integer subtypes should be provided in the library package
Long_Integer is supported. Other standard integer types are supported
so this advice is not fully followed. These types
are supported for convenient interface to C, and so that all hardware
types of the machine are easily available.