On 15 September 2011 09:39, Andrew Haley wrote: > 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. The OP mentioned Mandriva 2011 but that still doesn't tell us much, this is a gcc list not a Mandriva one so we don't know about the distro or what packages are installed. Does Mandriva ship an x86_64.rpm for gcj? Have you installed it? What does "rpm -qa *gcj*" show?