On 10/23/07, Bakul Shah <bakul+plan9@bitblocks.com> wrote:
>
> > Mac OS X is still 32bit last I checked.  You're likely having an EFI
> related
> > issue.
>
> MacOS X 10.4.9+ is already 64 bit capable, at least on the
> MacBook Pro
>
> $ sysctl machdep.cpu.brand_string
> machdep.cpu.brand_string: Intel(R) Core(TM)2 CPU         T7400  @ 2.16GHz
>
> $ sysctl hw.optional.x86_64
> hw.optional.x86_64: 1
>
> $ cat > ilp.c <EOF
> #include <stdio.h>
> int main(int c, char**v) {
>     printf("i:%d l:%d ll:%d p:%d\n",
>            sizeof(int), sizeof(long), sizeof(long long), sizeof(void*));
> }
> EOF
>
> $ cc -m32 ilp.c -o ilp4
> $ cc -m64 ilp.c -o ilp8
>
> $ file ilp4 ilp8
> ilp4: Mach-O executable i386
> ilp8: Mach-O 64-bit executable x86_64
>
> $ ilp4
> i:4 l:4 L:8 p:4
> $ ilp8
> i:4 l:8 L:8 p:8
>

it's increasingly offtopic but yes :-)

The whole system is not 64bit end to end.  Objective C and Cocoa aren't yet
64bit, and I've yet to fail to get alignment errors with certain C memory
allocation functions on my MBP with Tiger.

I hope it's all fixed Friday, not that I see me using 64bit apps too much, I
don't think I have enough RAM, even if the extra registers give me a bit of
a performance boost  :-)

Dave