Generating .pyc/.pyo from a make file

[Steve Holden]

Tim Daneliuk wrote:

> Steve Holden wrote:
> 
>> Roland Heiber wrote:
>>
>>> Tim Daneliuk wrote:
>>>
>>>> It does - thanks.  One more question:  Are pyc and pyo file portable
>>>> across operating systems?  I suspect not since I generated a pyo
>>>> on a FreeBSD machine that will not run on a Win32 machine.  I was
>>>> under the impression that "compiled" meant optimized byte code that
>>>> was portable across implementations, but it looks to not be the case...
>>>>
>>>
>>> Hi,
>>>
>>> ..pyc's should be, cause it's standard python-bytecode, if you use 
>>> massive optimizations it depends not on the os but on the underlying 
>>> cpu/architecture ...
>>>
>>> So long, Roland
>>
>>
>>
>> You probably tried to use a bytecode file from *one* version of Python 
>> with an interpreter of another version. Python actually checks the 
>> first four bytes of the .pyc file for a compatible "magic number" 
>> before accepting the file for execution.
>>
>> regards
>>  Steve
> 
> 
> Aha!  Exactly ... and that makes perfect sense too.  D'oh!  I guess a 
> better
> distribution strategy would be to have the installation program generate 
> the pyo
> file at installation time...
> 
> Thanks -
> 
That's what most sensible distributions do.

regards
  Steve
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