[erlang-questions] Problems cross compiling: eheap_alloc: Cannot reallocate 3480006320 bytes of memory

Rickard Green rickard@REDACTED
Fri Feb 5 16:21:35 CET 2010

I found a bug that can cause `configure' to detect wrong size of `off_t' 
when cross compiling. I'll fix it and inform you when the fix has 
appeared in r13b04_dev (probably monday next week).

I'm not to fond of adding ac_cv_sizeof_* to the xcomp-conf files. 
`configure' should be able to figure these things out. If `configure' 
doesn't, it is a bug that should be fixed (and you can always pass the 
value on the command line, or in the environment as a workaround until 
the bug has been fixed).


Winston Smith wrote:
> This is *exactly* what I did, and with what's in r13b04_dev I got it
> working on the avr32-linux platform (NGW100) pretty easily.  I'm just
> in the process of preparing a patch that includes a xcomp/.conf file
> for avr32-linux for submission to erlang-patches.
> The new system works really well, the only thing I had to do was set
> the environment variable ac_cv_sizeof_off_t to 4 as configure can't
> figure it out and picks 8 (incorrectly).
> I noticed in the xcomp/README that you suggest updating otp_build to
> include new settings such as this, so I'm adding new settings for
> ac_cv_sizeof_off_t and also ac_cv_sizeof_size_t so they can more
> easily be customized in the .conf file.
> Many thanks and a great job on significantly improving the cross
> compilation support for Erlang!
> Winston.
> On Wed, Feb 3, 2010 at 9:27 PM, Rickard Green <rickard@REDACTED> wrote:
>> Current cross compiling support has lots of issues. I'd recommend that
>> you wait for the R13B04 release if you want to cross compile
>> Erlang/OTP.
>> The upcoming R13B04 release will have much better support for cross
>> compiling. I've just committed a bunch of cross fixes in the r13b04
>> development branch which are available at
>> <http://github.com/erlang/otp> (ccase/r13b04_dev branch). If you want
>> to try it out, have a look at the xcomp/README
>> <http://github.com/erlang/otp/blob/ccase/r13b04_dev/xcomp/README>
>> since lots of things have changed regarding cross compiling since
>> R13B03.
>> If you get it working with r13b04_dev, the configure results from
>> r13b04_dev may give you a hint about what is wrong with the R13B03
>> configuration. However, I'd still recommend that you wait for the
>> R13B04 release.
>> Regards,
>> Rickard Green, Erlang/OTP, Ericsson AB.
>> 2010/1/29 Winston Smith <smith.winston.101@REDACTED>:
>>> Trying to run a cross compiled version of R13B03 on an AVR32-Linux
>>> system (NGW100/buildroot-2.3.0) I get the following:
>>> /home/avr32 # erl
>>> Crash dump was written to: erl_crash.dump
>>> eheap_alloc: Cannot reallocate 3480006320 bytes of memory (of type "heap").
>>> Aborted
>>> I've had this working before (I think with R13B01) but I've since
>>> upgraded my build host from Ubuntu 9.04 to 9.10.  I actually had this
>>> same issue originally, and I somehow solved it, but I can't for the
>>> life of me remember what I did.  I am setting up an xconf file with
>>> the proper values for size_t, off_t, big endian etc; in fact I based
>>> my build script on Brian Zhou's script for building Erlang on NSLU2
>>> Linux:
>>> http://svn.nslu2-linux.org/svnroot/optware/trunk/make/erlang.mk
>>> Any thoughts on where to start debugging/diagnosing this?  (the
>>> embedded gdb doesn't work)  Is the erl_crash.dump useful (and how do I
>>> interpret it!)?
>>> Many thanks in advance!
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Rickard Green, Erlang/OTP, Ericsson AB.

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