Hello Jean,

There is no 64-bit native OCaml compiler for Mac OS X intel. I have a patch that works in Leopard, but did not compile opt.opt in Tiger, meaning that something is not OK, so I did not offer it to the community. The bootstrap went fine, findlib and godi compiled OK too. I can post the patches somewhere if you want to give it a shot.

My memory intensive application runs fine in Leopard with this compiler. But the binaries do not execute in Tiger (I found that other people had the same trouble copying a 64 bit apps from Leopard to Tiger and the other way around, but didn't look into it).

If you want it ... I can post it, maybe someone can cleanup my job? All that would be needed after patching is:

./configure -host x86_64-apple-darwin -prefix /opt/ocaml/experimental

(The prefix I always add for my ocaml-modified comilers).

best,

Andres

On Jul 15, 2008, at 1:06 PM, Jean Krivine wrote:

Dear all

I downloaded the last version of ocaml (3.10.2) but I must confess I
don't know what option I should pass to the compiler to make a binary
that uses 64 bits.
I tried naively ocamlopt -ccopt -arch -ccopt x86_64 but that doesn't
work. Any idea?



On Fri, Jul 11, 2008 at 6:01 PM, Richard Jones <[EMAIL PROTECTED]> wrote:
On Fri, Jul 11, 2008 at 03:49:26PM -0400, Jean Krivine wrote:
I am trying to run a stochastic simulator (written in ocaml) on a huge
data set and I have the following error message:

I can confirm that OCaml works fine with huge datasets, on 64 bit
platforms anyway.

sim(9595) malloc: *** mmap(size=1048576) failed (error code=12)
*** error: can't allocate region
*** set a breakpoint in malloc_error_break to debug
Fatal error: out of memory.

My system:

Mac Pro running OS X 10.5.4
Processor:  2 x 2.8 GHz Quad-Core Intel Xeon
Memory:  10 GB 800 MHz DDR2 FB-DIMM

Does someone know what happened? Do you have any idea of any parameter
I could tune in order to avoid that?

Is the compiler 32 bits or 64 bits on this machine?  Try doing:

$ ocaml
# Sys.word_size ;;

It should print out either '32' or '64'.

Also run your program under whatever the OS X equivalent of 'strace'
is (ktrace?) to find out exactly why the mmap call fails.

OCaml <= 3.10.2 on Linux suffers a nasty problem with its use of mmap
and randomized address spaces
(https://bugzilla.redhat.com/show_bug.cgi?id=445545#c9) but it doesn't
seem like this is the same issue.

Rich.

--
Richard Jones
Red Hat

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