Why cannot the build find the library?

BTW, the first two include paths are strange to me. I don't find any way to delete it. Please see the red bar in the picture. Where does it come from?

Thanks,

Thanks for your prompt reply.

I follow the below link on my first cross compiling project, which works well.

http://processors.wiki.ti.com/index.php/Processor_Linux_SDK_CCS_Installation_Guide#Cross-Compiling_the_Sources

I didn't anticipate any problem with the new audio cross-compiling project.

Has TI Wiki a cross-compiling tutorial on command line version?

Or, is there a thread on the forum appropriate the audio (ALSA) build procedures with command line?

Regards,

/*
 * helloworld.c
 *
 *  Created on: Aug 30, 2015
 *      Author: u64rj
 *      e2e.ti.com/.../291494
 */
#include <stdio.h>
#include <stdlib.h>
#include <alsa/asoundlib.h>

#define BUFF_SIZE 4096

int main (int argc, char *argv[])
{
  int err;
  short buf[BUFF_SIZE];
  int rate = 44100; /* Sample rate */
  unsigned int exact_rate; /* Sample rate returned by */
  /* Handle for the PCM device */
  snd_pcm_t *playback_handle;
  /* Playback stream */
  snd_pcm_stream_t stream = SND_PCM_STREAM_PLAYBACK;
  /* This structure contains information about the hardware and can be used to specify the configuration to be used for */
  /* the PCM stream. */
  snd_pcm_hw_params_t *hw_params;

  /* Name of the PCM device, like plughw:0,0 */
  /* The first number is the number of the soundcard, the second number is the number of the device. */

  static char *device = "default"; /* playback device */
  /* Open PCM. The last parameter of this function is the mode. */
  if ((err = snd_pcm_open (&playback_handle, device, stream, 0)) < 0) {
      fprintf (stderr, "cannot open audio device (%s)\n", snd_strerror (err));
      exit (1);
  }

  /* Allocate the snd_pcm_hw_params_t structure on the stack. */
  if ((err = snd_pcm_hw_params_malloc (&hw_params)) < 0) {
      fprintf (stderr, "cannot allocate hardware parameters (%s)\n", snd_strerror (err));
      exit (1);
  }
  /* Init hwparams with full configuration space */
  if ((err = snd_pcm_hw_params_any (playback_handle, hw_params)) < 0) {
      fprintf (stderr, "cannot initialize hardware parameter structure (%s)\n", snd_strerror (err));
      exit (1);
  }

  /* Set access type. */
  if ((err = snd_pcm_hw_params_set_access (playback_handle, hw_params, SND_PCM_ACCESS_RW_INTERLEAVED)) < 0) {
      fprintf (stderr, "cannot set access type (%s)\n", snd_strerror (err));
      exit (1);
  }

  /* Set sample format */
  if ((err = snd_pcm_hw_params_set_format (playback_handle, hw_params, SND_PCM_FORMAT_S16_LE)) < 0) {
      fprintf (stderr, "cannot set sample format (%s)\n", snd_strerror (err));
      exit (1);
  }

  /* Set sample rate. If the exact rate is not supported by the hardware, use nearest possible rate. */
  exact_rate = rate;
  if ((err = snd_pcm_hw_params_set_rate_near (playback_handle, hw_params, &exact_rate, 0)) < 0) {
      fprintf (stderr, "cannot set sample rate (%s)\n", snd_strerror (err));
      exit (1);
  }

  if (rate != exact_rate) {
      fprintf(stderr, "The rate %d Hz is not supported by your hardware.\n ==> Using %d Hz instead.\n", rate, exact_rate);
  }

  /* Set number of channels */
  if ((err = snd_pcm_hw_params_set_channels (playback_handle, hw_params, 2)) < 0) {
      fprintf (stderr, "cannot set channel count (%s)\n", snd_strerror (err));
      exit (1);
  }
  /* Apply HW parameter settings to PCM device and prepare device. */
  if ((err = snd_pcm_hw_params (playback_handle, hw_params)) < 0) {
      fprintf (stderr, "cannot set parameters (%s)\n", snd_strerror (err));
      exit (1);
  }

  snd_pcm_hw_params_free (hw_params);

  if ((err = snd_pcm_prepare (playback_handle)) < 0) {
      fprintf (stderr, "cannot prepare audio interface for use (%s)\n", snd_strerror (err));
      exit (1);
  }
  /* Write some junk data to produce sound. */
  if ((err = snd_pcm_writei (playback_handle, buf, BUFF_SIZE/2)) != BUFF_SIZE/2) {
      fprintf (stderr, "write to audio interface failed (%s)\n", snd_strerror (err));
      exit (1);
  } else {
      fprintf (stdout, "snd_pcm_writei successful\n");
  }
  snd_pcm_close (playback_handle);
}

There are three libraries: smixer-sbase.so, smixer-hda.so and smixer-ac97.so. Does either one of the .so works for a simple ALSA application project, which is based on web link:

Thanks,

Hi,

Try to cross compile this ALSA application.

linux-host$ arm-linux-gnueabihf-gcc -o hello_alsa helloworld.c -lasound

You would get hello_alsa binary and run this on your target board.

Your line does solve the problem, even in CCS IDE it is OK too. The mysterious thing is that asound is under proc/, not like the new ALSA generated library. Could you tell me:

1. asound is a library or not, although it is set in IDE and command line as a library.

2. asound is generated by the ALSA 1.0.29 I just download?

Thanks,