Re: sizeof(int) in 64-bit C compilers

Duane Sand wrote:
> 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. ...


I know DEC's Alpha OSF compilers defined sizeof(int)==32 and
sizeof(long)==64. They also had a link option which foreced all
"data" to be available within the 32 bit range. This proved to be not
too useful -- pointers were still 64bit they just contained values
which were in a 32bit range. I was supposed to be useful for porting
but I found it usually just masked errors until later. They also, I
believe, did modify their compilers in a later release to actually
generate "32bit code" where pointers were really 32bit quantities, but
I never used that compiler and could be wrong??


HaL chose to make sizeof(int)==sizeof(long)==sizeof(void*)==64 -- HaL
has makes a Sparc v9 (64bit) machine running a 64-bit version of
Solaris. Sun has their 64bit Sparc out but their OS is not full
64-bit.


...............larry
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