On 09/15/2011 09:16 AM, Me Myself and I wrote: > > Then why is this, if my compiler is on a 64 bit operating system with > 64 bit hardware? Shouldn't it compile to 64 bit files anyway? > Isn't the operating system really doing this by default? Is this my reply really accurate? > If not, why not? Where can I find simple instructions to build gcj > to compile 64 bit optimised executable files? We don't know the answers to any of these questions because we don't know who built the gcj you're using or what OS it runs on. Andrew.