Q: Error on compiling/linking

Q: Error on compiling/linking

[gerlacbd]

Hello,

I'm new to ALSA and I have a problem on programming the library:
On my system ALSA library 0.9.7 and ALSA 0.9.7 driver is installed. 
According to the api-documentation on the ALSA project site, I tried to 
do something like:

snd_seq_client_info_t *info;
snd_seq_client_info_malloc ( &info );
snd_seq_get_client_info( seq_handle, info );

... do sth. like readout name with snd_seq_client_info_get_name( info );

snd_seq_client_info_free ( info );

When compiling/linking, I receive:
"undefined reference to `snd_seq_client_info_malloc'"
Same for snd_seq_client_info_get_name and for snd_seq_client_info_free.

What's wrong? Is'nt my lib up to date? (I read that the sequencer api 
has been rewritten with get/set functions, but in which version?)

Thanks for answers or links to some introduction sites.

Berhnard


-- 

---------------------------------
Bernhard Gerlach
Fraunhofer AEMT
Am Helmholtzring 1 (Haus M)
98693 Ilmenau
Germany

mail: gerlacbd@emt.iis.fhg.de
---------------------------------



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Re: Q: Error on compiling/linking

[Takashi Iwai]

At Thu, 09 Oct 2003 18:08:16 +0200,
gerlacbd wrote:
> 
> 
> Hello,
> 
> I'm new to ALSA and I have a problem on programming the library:
> On my system ALSA library 0.9.7 and ALSA 0.9.7 driver is installed. 
> According to the api-documentation on the ALSA project site, I tried to 
> do something like:
> 
> snd_seq_client_info_t *info;
> snd_seq_client_info_malloc ( &info );
> snd_seq_get_client_info( seq_handle, info );
> 
> ... do sth. like readout name with snd_seq_client_info_get_name( info );
> 
> snd_seq_client_info_free ( info );

it looks ok.

> When compiling/linking, I receive:
> "undefined reference to `snd_seq_client_info_malloc'"
> Same for snd_seq_client_info_get_name and for snd_seq_client_info_free.
> 
> What's wrong? Is'nt my lib up to date? (I read that the sequencer api 
> has been rewritten with get/set functions, but in which version?)

how do you link libasound?


Takashi


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Re: Q: Error on compiling/linking

[Bernhard Gerlach]

Unfortunatly I forget to mention that the functions listed in the 
documentation which is linked to on Takashi's page (section "Documents 
on Alsa") seem to work, eg. snd_card_get_name, snd_seq_open and so on. 
That is the old api, isn't it?


Takashi Iwai wrote:

>>When compiling/linking, I receive:
>>"undefined reference to `snd_seq_client_info_malloc'"
>>Same for snd_seq_client_info_get_name and for snd_seq_client_info_free.
>>
>>What's wrong? Is'nt my lib up to date? (I read that the sequencer api 
>>has been rewritten with get/set functions, but in which version?)
> 
> 
> how do you link libasound?

The compiler options are -Wl,-Bdynamic -lasound.
ldd says (when commenting out the not working function calls and 
compiling) that libasound.so.2 was linked.


Bernhard




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Re: Q: Error on compiling/linking

[Takashi Iwai]

At Fri, 10 Oct 2003 09:25:21 +0200,
Bernhard Gerlach wrote:
> 
> 
> Unfortunatly I forget to mention that the functions listed in the 
> documentation which is linked to on Takashi's page (section "Documents 
> on Alsa") seem to work, eg. snd_card_get_name, snd_seq_open and so on. 
> That is the old api, isn't it?

ehm, yeah, most likely.  i'm not sure which page you are referring to,
but i've not updated my web pages since long time...

> 
> 
> Takashi Iwai wrote:
> 
> >>When compiling/linking, I receive:
> >>"undefined reference to `snd_seq_client_info_malloc'"
> >>Same for snd_seq_client_info_get_name and for snd_seq_client_info_free.
> >>
> >>What's wrong? Is'nt my lib up to date? (I read that the sequencer api 
> >>has been rewritten with get/set functions, but in which version?)
> > 
> > 
> > how do you link libasound?
> 
> The compiler options are -Wl,-Bdynamic -lasound.
> ldd says (when commenting out the not working function calls and 
> compiling) that libasound.so.2 was linked.

then, no idea.
it'd be better to show your whole code then.


ciao,

Takashi


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Re: Q: Error on compiling/linking

[Bernhard Gerlach]

Hello,

I found the mistake. The problem was our complicated project/makefile 
structure. We were using the 0.9.7 ALSA-Libs on our systems and we are 
using the header files of the 0.9.7 ALSA-Api. Anyway, we were linking 
against an old ALSA-lib (maybe a 0.9.0 version). After a change in the 
project tree, everything (old and new api) works great now.

However, thank you very much for your efforts!!


Thanks,

Bernhard

-- 

---------------------------------
Bernhard Gerlach
Fraunhofer AEMT
Am Helmholtzring 1 (Haus M)
98693 Ilmenau
Germany

mail: gerlacbd@emt.iis.fhg.de
---------------------------------



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