[erlang-questions] Erlang on ARM9?

Banibrata Dutta banibrata.dutta@REDACTED
Mon Sep 26 14:22:22 CEST 2011

This ARM9 in question would have some kind of a cross compile environment.
For example, there's a rather popular (& cheap) ARM9 board called mini2440,
and there are 2-3 different cross compilers... there's one from FriendlyARM,
there's one from a co. called Pengutronix, then there's an old one from ARM
itself, and some folks have rolled their own.

On Mon, Sep 26, 2011 at 5:08 PM, Guy Wiener <wiener.guy@REDACTED> wrote:

> Looks like I'll have to compile from source - Embedded Erlang is not what I
> need because it includes its-own embedded Linux, and I need to install on an
> existing Linux.
> Can someone who has done this before be as kind as writing a minimal how-to
> for cross-compiling Erlang to ARM?
> Thanks again,
>   Guy
> On Tue, Sep 20, 2011 at 5:16 PM, Paulo Ferreira <pdf@REDACTED> wrote:
>> On 2011/09/19, at 09:14, Guy Wiener wrote:
>> > Hello Erlangers,
>> > I am checking an option to use Erlang to control a Linux-based device (a
>> programmable helicopter).  Is there an efficient port of Erlang that works
>> on top of an ARM9 processor?  If so, the usage scenario will be many
>> processes running on a single node, with frequent message-passing, some
>> access to binary files, and no shared data (no ETS, DETS or Mnesia).  Is
>> this scenario likely to perform well on an embedded Erlang?
>> >
>> > Thanks,
>> >   Guy Wiener,
>> >   Dept. of Computer Science and Applied Math,
>> >   Weizmann Institute for Science.
>> Well, just it just compiles from source well.
>> I have experience using a S3C2440 board at 400 Mhz and on some informal
>> benchmarks ( ring ) it is just 7 times slower than a 2,2 Ghz core 2 Duo Mac
>> book.
>> From other erlang embedded experiences:
>>        How do you control the hardware in C?  Linux device drivers are
>> very slow, when compared to direct memory access.
>>        Doing NIFs and dynamic libs may be hard.
>>        ARM processors are usually supported by the latest gcc version, and
>> that is VERY good for Erlang porting.
>>        If you try to compile Erlang with an older gcc version, you may get
>> all the kind of "strange and wonderful"  errors.
>>        Check the gcc version of your toolchain!
>> My best regards
>> Paulo Ferreira
>> P.S.: Please replace "strange and wonderful" by the suitable words in your
>> native language....
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