Seems long long is always 64 bits, but who can say about int, from: http://www.ibm.com/developerworks/library/l-port64/index.html

The Linux 64-bit architecture

Unfortunately, the C programming language does not provide a mechanism for adding new fundamental data types. Thus, providing 64-bit addressing and integer arithmetic capabilities involves changing the bindings or mappings of the existing data types, or adding new data types to the language.

Table 1. 32-bit and 64-bit data models

	ILP32	LP64	LLP64	ILP64
char	8	8	8	8
short	16	16	16	16
int	32	32	32	64
long	32	64	32	64
long long	64	64	64	64
pointer	32	64	64	64

The most exhaustive handling of the topic that I found for multiple platforms, from: http://www.ibm.com/developerworks/library/l-port64/index.html

Cheers, 
Connie L. O'Dell 
Sr. Verification Specialist 
c.odell@co-consulting.net 
303-641-5191 
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