[Lazarus] 64bit support in Lazarus and FPC

[Torsten Bonde Christiansen]

Graeme Geldenhuys wrote:
> Hi,
>
> How well does FPC and Lazarus support 64bit OSes? I'm upgrading my PC 
> at work (long overdue) and am thinking of installing 64bit Ubuntu on 
> the new system to accommodate >4GB memory. As far as I know FPC works 
> perfectly on 64bit systems, but does Lazarus?
I've been working with Lazarus (of the trunk) for about 10 months now on 
my  Ubuntu 9.04 64-bit edition with no problems so far.
>
> I would still require to build 32bit versions of our software, because 
> most of our client are still on 32bit systems. I gather this should 
> not be an issue either, even though I use a 64bit OS and 64bit FPC? 
> You can run 32bit applications on a 64bit OS, right?
I tried to follow the FPC cross-compile guide (found here: 
http://wiki.freepascal.org/Cross_compiling) but failed to get 64 to 32 
bit cross-compile working. But i think that's more down to my lack of 
experience with fpc and crosscompilation.

Kind regards,
Torsten Bonde Christiansen.