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madplay was failing to build with errors such as :
audio_alsa.o: In function `config':
audio_alsa.c:(.text+0x200): undefined reference to `snd_pcm_hw_params_set_rate_near@ALSA_0.9'
audio_alsa.c:(.text+0x25c): undefined reference to `snd_pcm_hw_params_set_buffer_time_near@ALSA_0.9'
audio_alsa.c:(.text+0x284): undefined reference to `snd_pcm_hw_params_get_buffer_size@ALSA_0.9'
audio_alsa.c:(.text+0x2a4): undefined reference to `snd_pcm_hw_params_set_period_time_near@ALSA_0.9'
audio_alsa.c:(.text+0x2d4): undefined reference to `snd_pcm_hw_params_get_period_size@ALSA_0.9'
The ALSA library uses symbol versioning by default, to handle ABI
changes. However, since uClibc doesn't seem to support symbol
versioning, we disable this when building the ALSA library by passing
--without-versioned.
However, madplay relies on the old ALSA ABI, so even without symbol
versioning, references to versioned symbols are generated (functions
with the same name, but different API, exist in the old and new API).
The easiest solution is to switch madplay to the new API. This is done
thanks to a patch written by Micha Nelissen <micha@neli.hopto.org> and
available at http://article.gmane.org/gmane.comp.audio.mad.devel/729.
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
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