Flash 9

Flash 9

[Lee Revell]

Is it legal for a proprietary application to incorporate alsa-lib by
static linking?  I thought this required an LGPL exception.

Because contrary to what Adobe says, this is what the new Flash 9 beta
does:

$ ldd .mozilla/plugins/libflashplayer.so | grep asound 
$

$ strings .mozilla/plugins/libflashplayer.so | grep snd_
snd_pcm_open
snd_pcm_close
snd_pcm_start
snd_pcm_drop
snd_pcm_prepare
snd_pcm_resume
snd_pcm_hw_params_sizeof
snd_pcm_sw_params_sizeof
snd_pcm_status_sizeof
snd_pcm_info
snd_pcm_info_get_id
snd_pcm_info_get_name
snd_pcm_hw_params_any
snd_pcm_hw_params_set_access
snd_pcm_hw_params_set_format
snd_pcm_hw_params
snd_pcm_sw_params_current
snd_pcm_sw_params

Etc.

Lee




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Re: Flash 9

[Juergen Hennerich]

Lee Revell schrieb:
> Is it legal for a proprietary application to incorporate alsa-lib by
> static linking?  I thought this required an LGPL exception.
> 
They'd have to provide the object files and a linker script to relink 
the lib.

> Because contrary to what Adobe says, this is what the new Flash 9 beta
> does:
> 
> $ ldd .mozilla/plugins/libflashplayer.so | grep asound 
> $
> 
> $ strings .mozilla/plugins/libflashplayer.so | grep snd_
> snd_pcm_open
> snd_pcm_close
> snd_pcm_start
> snd_pcm_drop
> snd_pcm_prepare
> snd_pcm_resume
> snd_pcm_hw_params_sizeof
> snd_pcm_sw_params_sizeof
> snd_pcm_status_sizeof
> snd_pcm_info
> snd_pcm_info_get_id
> snd_pcm_info_get_name
> snd_pcm_hw_params_any
> snd_pcm_hw_params_set_access
> snd_pcm_hw_params_set_format
> snd_pcm_hw_params
> snd_pcm_sw_params_current
> snd_pcm_sw_params
> 
> Etc.
> 
> Lee
> 
Because you find those strings in the library, doesn't necessarily mean, 
that there is code from libasound in this library.

-> man dlopen

Juergen


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Re: Flash 9

[Lee Revell]

On Tue, 2006-10-24 at 23:38 +0200, Juergen Hennerich wrote:
> Because you find those strings in the library, doesn't necessarily
> mean, that there is code from libasound in this library.
> 
> -> man dlopen 

Ah, I see.  Why would one use dlopen() for some libraries but regular
dynamic linking for others?

Lee


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Re: Flash 9

[Prakash Punnoor]

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Am Mittwoch 25 Oktober 2006 00:32 schrieb Lee Revell:
> On Tue, 2006-10-24 at 23:38 +0200, Juergen Hennerich wrote:
> > Because you find those strings in the library, doesn't necessarily
> > mean, that there is code from libasound in this library.
> >
> > -> man dlopen
>
> Ah, I see.  Why would one use dlopen() for some libraries but regular
> dynamic linking for others?

To not be dependant on the lib. The prog will still work in dlopen case.
-- 
(°=                 =°)
//\ Prakash Punnoor /\\
V_/                 \_V

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Re: Flash 9

[Juergen Hennerich]

Prakash Punnoor schrieb:
> Am Mittwoch 25 Oktober 2006 00:32 schrieb Lee Revell:
>> On Tue, 2006-10-24 at 23:38 +0200, Juergen Hennerich wrote:
>>> Because you find those strings in the library, doesn't necessarily
>>> mean, that there is code from libasound in this library.
>>>
>>> -> man dlopen
>> Ah, I see.  Why would one use dlopen() for some libraries but regular
>> dynamic linking for others?
> 
> To not be dependant on the lib. The prog will still work in dlopen case.
> 
I guess, they could have achieved the same with weak linking. I don't 
know if there are really any technical reasons to prefer dlopen/dlsym 
over weak linking, or if that is just a matter of taste.

Juergen


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Re: Flash 9

[Måns Rullgård]

Juergen Hennerich <juergen@hennerich.eu> writes:

> Lee Revell schrieb:
>> Is it legal for a proprietary application to incorporate alsa-lib by
>> static linking?  I thought this required an LGPL exception.
>> 
> They'd have to provide the object files and a linker script to relink 
> the lib.
>
>> Because contrary to what Adobe says, this is what the new Flash 9 beta
>> does:
>> 
>> $ ldd .mozilla/plugins/libflashplayer.so | grep asound 
>> $
>> 
>> $ strings .mozilla/plugins/libflashplayer.so | grep snd_
>> snd_pcm_open
>> snd_pcm_close
>> snd_pcm_start
>> snd_pcm_drop
>> snd_pcm_prepare
>> snd_pcm_resume
>> snd_pcm_hw_params_sizeof
>> snd_pcm_sw_params_sizeof
>> snd_pcm_status_sizeof
>> snd_pcm_info
>> snd_pcm_info_get_id
>> snd_pcm_info_get_name
>> snd_pcm_hw_params_any
>> snd_pcm_hw_params_set_access
>> snd_pcm_hw_params_set_format
>> snd_pcm_hw_params
>> snd_pcm_sw_params_current
>> snd_pcm_sw_params
>> 
>> Etc.
>> 
>> Lee
>> 
> Because you find those strings in the library, doesn't necessarily mean, 
> that there is code from libasound in this library.
>
> -> man dlopen

Flash player does use dlopen() so everything is fine.

-- 
Måns Rullgård
mru@inprovide.com


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