向imx6上移植madplay 因为是alsa声卡 找了好多看了之后，说是madplay编译时要添加--with-alsa，添加后报错，不知道该怎么解决
audio_alsa.c: In function ‘play’:
audio_alsa.c:284:4: warning: pointer targets in passing argument 1 of ‘audio_pcm’ differ in signedness [-Wpointer-sign]
play->mode, play->stats);
^
audio_alsa.c:284:4: note: expected ‘unsigned char *’ but argument is of type ‘char *’
make[2]: *** [audio_alsa.o] 错误 1
make[2]:正在离开目录 /opt/madplay/madplay_alsa/madplay-0.15.1b' make[1]: *** [all-recursive] 错误 1 make[1]:正在离开目录/opt/madplay/madplay_alsa/madplay-0.15.1b'
make: *** [all] 错误 2