[erlang-questions] determining what erts version a .beam was compiled with

Logan, Martin <>
Thu Jan 24 00:21:01 CET 2008


Interesting - I see the point about the compiler version being more salient than the erts vsn.  The problem is other parts of my system depend on the erts vsn - perhaps in error.  I need to think about this.  Thanks for the info.  

Cheers,
Martin

-----Original Message-----
From:  [mailto:] On Behalf Of Bengt Kleberg
Sent: Wednesday, January 23, 2008 1:02 AM
Cc: 
Subject: Re: [erlang-questions] determining what erts version a .beam was compiled with

beam_lib:chunks/2 works for me:

3> ls().
be_lib.beam
ok
4> beam_lib:chunks( "be_lib.beam", [compile_info]).
{ok,{be_lib,
         [{compile_info,
              [{options,
                   [{cwd,"/home/dev_patches"},
                    {outdir,"/home/dev_patches"}]},
               {version,"4.3.7"},
               {time,{2005,8,22,15,2,36}},
               {source,"/home/dev_patches/be_lib.erl"}]}]}}
5>


bengt
Those were the days...
    EPO guidelines 1978: "If the contribution to the known art resides
    solely in a computer program then the subject matter is not
    patentable in whatever manner it may be presented in the claims."


On 01/23/08 00:18, Lennart Öhman wrote:
> I believe there is a version attribute in the module_info tag 'compile'
> telling at least the version of the compiler application used. I guess
> this is actually more accurate since it must be for which beam object
> code has been generated that is of interest. Not necessarily which
> runtime system was used when compiling.
> But I further guess that you must inspect this information using some
> beam_lib function, because otherwise you must call the module_info
> function and that means you have to load the module. But if it is
> incompatible (younger than) to your runtime system at hand, that can
> be difficult.
> 
> Best Regards
> Lennart
> 
> ---------------------------------------------------------------------------
> Lennart Öhman                   phone   : +46-8-587 623 27
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> ________________________________________
> From:  [mailto:] On Behalf Of Logan, Martin
> Sent: den 22 januari 2008 19:05
> To: 
> Subject: [erlang-questions] determining what erts version a .beam was compiled with
> 
> Does anyone know whether it is possible to tell by inspecting some .beam object code what erts vsn it was compiled on?
> 
> Cheers,
> Martin
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> erlang-questions mailing list
> 
> http://www.erlang.org/mailman/listinfo/erlang-questions
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