sizeof(int) in 64-bit C compilers

A number of machines now support 32-bit and 64-bit addressing equally
well, and some even have suitable C compilers that support both forms
of programs. I would like to know which of these compilers have
defined "int" to be 64-bits in their 64-bit-pointer codegen model, and
which compilers have kept "int" as 32-bits as in their 32-bit-pointer
model. The machines where this question arises include
    HP-PA, Sparc, Mips, Alpha, PowerPC.


The Mips/SGI compilers define "int" as 32 bits in 32-bit-pointer code,
and 64 bits in 64-bit-pointer code.


This question is not just about C, since this choice tends to affect
register-level call/return conventions for all languages on that
machine, and whether programs can contain a mix of 32- and
64-bit-pointer routines.


Do any of the 64-bit-pointer versions of Unix support a mix of pointer
sizes, via near and far qualifiers? Or do they all insist on all
pointers being equally long?
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