Alsa not working when linked to a library

[Fortini Matteo <matteo.fortini@mta.it>]

Hi,
I'm experiencing a very strange behavior.

I'm using alsa 1.0.18 on a powerpc platform.

If I run the following simple code from the main of a .c file, it works 
perfectly, but if I put into a shared .so library (libaudio.so), then I 
link the main with -laudio -lasound, then the hwparams structure is not 
filled with anything, while the alsa functions don't return any error.

Do you have any clue why this could happen?

TIA

############################################################
int play_sample(char *pcm_name, char *samplename)
{
    int res;
    snd_pcm_t *pcm_handle;         
    snd_pcm_hw_params_t *hwparams;           
    const char *name= (pcm_name != NULL) ? pcm_name : "speaker";

    if ( (res = snd_pcm_open(&pcm_handle, name, SND_PCM_STREAM_PLAYBACK, 
0)) < 0) {
        fprintf(stderr, "Error opening PCM device %s\n", pcm_name);
        return 1;
    } else {
        printf ("snd_pcm_open returned %d\n", res);
    }

  
    snd_pcm_hw_params_malloc(&hwparams);
    if (snd_pcm_hw_params_any(pcm_handle, hwparams) < 0) {
        fprintf(stderr, "Can not configure this PCM device.\n");
        return 1;

   snd_pcm_close(pcm_handle);
}


int main (void)
{
    play_sample (NULL, "test_sound.wav);

    return 0;
}
############################################################