/**
    sudo apt-get install libasound-dev

    g++ -I/usr/include/alsa -lasound main.cpp -o radio
*/

#include <cstdio>

#include <alsa/asoundlib.h>


int
main(int inArgC, const char** inArgs)
{
    std::printf("Hello world\n");

    snd_pcm_t*              pcm = NULL;
    char* pcmName = ::strdup("plughw:0,0");
    snd_pcm_stream_t        stream = SND_PCM_STREAM_PLAYBACK;
    int result = snd_pcm_open(&pcm, pcmName, stream, 0);
    if (result < 0)
    {
        std::fprintf(stderr, "Error opening PCM device %s: %d\n", pcmName, result);
        return -1;
    }

    return 0;
}


-----------

$ g++ -lasound main.cpp -o radio
/tmp/cckzNJjH.o: In function `main':
main.cpp:(.text+0x4a): undefined reference to `snd_pcm_open'
collect2: error: ld returned 1 exit status