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Date: Fri, 10 Nov 2000 09:22:18 -0500
From: Jason Tishler <Jason DOT Tishler AT dothill DOT com>
To: Mitsuo Igarashi <mitsu5 AT ruby DOT famille DOT ne DOT jp>
Cc: cygwin AT sources DOT redhat DOT com
Subject: Re: How to make an extension of Python
Message-ID: <20001110092218.A183@dothill.com>
References: <000b01c04ae9$21360e40$f06afea9 AT mitsu5>
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In-Reply-To: <000b01c04ae9$21360e40$f06afea9@mitsu5>; from mitsu5@ruby.famille.ne.jp on Fri, Nov 10, 2000 at 04:37:09PM +0900
Organization: Dot Hill Systems Corp.

Mitsuo,

On Fri, Nov 10, 2000 at 04:37:09PM +0900, Mitsuo Igarashi wrote:
> |> dllwrap -o myEnviron.pyd -def myEnviron.def myEnviron.o -lpython2.0
> |> "Importerror: dynamic modules does not define init
> |> function ( initmyEnviron)".
> |
> |My guess is for some reason initmyEnviron is not being exported from
> |myEnviron.pyd.  What is the contents of your myEnviron.def file?
> 
> 
> EXPORTS
>  initenviron

Your myEnviron.def file should be the following:

    EXPORTS
        initmyEnviron
    
and myEnviron.c should define the corresponding function:

    void initmyEnviron() { ... }

You can use also use:

    DL_EXPORT(void) initmyEnviron() { ... }

and then you shouldn't need the def file.

Python requires that your init function match your module name as follows:

    If you have a module named "foo", then your init function must be
    named "initfoo".

> |Were you importing the above module into the Win32 or Cygwin Python?
> 
> cygwin python
> 
> This failure is probably the bad -lpython2.0.
> "libpython2.0.a" is not shared?

Yes, but libpython2.0.a is not "bad" is it just static.  You will have
all kinds of problems trying to building shared extensions if you link
with the static library.  This is the main reason for my patch.

Jason

-- 
Jason Tishler
Director, Software Engineering       Phone: +1 (732) 264-8770 x235
Dot Hill Systems Corporation         Fax:   +1 (732) 264-8798
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