[Bf-committers] AMD64 bit support issues

Ken Hughes khughes at pacific.edu
Mon Nov 7 21:28:35 CET 2005

Jorrit Tyberghein wrote:
> Note that on 64-bits linux a long is 64bits.
> On 11/6/05, Timothy Kanters <tkanters at gmail.com> wrote:
>>On 11/6/05, Ken Hughes <khughes at pacific.edu> wrote:
>>>One of the links someone sent earlier points out that a long is 32-bits
>>A long is indeed 32bits but you have got __int64 under windows .

Yes, looking at the link for LP64 that Ton sent:
the only place sizeof(long) != sizeof(pointer) is 64-bit windows.

Here's how I see it:

Everywhere except 64-bit windows (what the heck is that called anyway? 
win64?) we could get away with long, but for win64 we'd have to hack 
with "#if defined()" a special pointer type (__int64 or long long) 
anyway.  To me it seems cleaner to not put those "#if defined()" in each 
module but to put them into one header file which is (should be) used by 
each file doing funny pointer-to-math casts.  We can call the type PTR 
or POINTER or FRED or whatever (or use the pre-defined intptr_t).

I'd like to take some of the patches which have been submitted and clean 
try to get the source fixed up prior to the 2.40 cvs freeze, and we 
could go for now with using longs.  But it would be nice to fix it now 
for all the platforms.


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