下载地址：https://www.alsa-project.org/main/index.php/Main_Page
1. alsa-lib
./configure --prefix=/home/dong/alsa_test/alsa-lib
make
make install
2. alsa-utils
./configure CFLAGS="-I/home/dong/alsa_test/alsa-lib/include" LDFLAGS="-L/home/dong/alsa_test/alsa-lib/lib/"
make
sudo make install
以上两步，就可以通过修改apay等工具的代码通过输出log或者gdb单步的方式来调试alsa相关的模块了