alsa 向mini2440移植

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下载
http://www.alsa-project.org/main/index.php/Download

记得下载较新的工具包和库。

交叉编译 alsa-lib
./configure --host=arm-none-linux-gnueabi --prefix=/usr/share/arm-alsa
make & make install

交叉编译 alsa-utils
./configure --host=arm-none-linux-gnueabi --with-alsa-inc-prefix=/usr/share/arm-alsa/include -- with-alsa-prefix=/usr/share/arm-alsa/lib --without-alsamixer // avoid the ncurses lib

如果出错将without 改为 disable

然后在alsaconfig/po/下 mkdir t-ja.gmo文件夹

chmod 777 t-ja.gmo

make

Copy lib to target board
cp -avr /usr/share/arm-alsa {$rootfs}/usr/share/arm-alsa

环境变量
export ALSA_CONFIG_PATH=/usr/share/arm-alsa/share/alsa/alsa.conf
未添加环境变量前出现的错误：
~ # ./aplay
ALSA lib conf.c:2827:(snd_config_hook_load) cannot access file /usr/share/arm-alsa/share/alsa/cards/aliases.conf
ALSA lib pcm.c:1959:(snd_pcm_open_conf) Invalid type for PCM default definition (id: default, value: cards.pcm.default)
aplay: main:533: audio open error: Invalid argument
~ # ./aplay
ALSA lib pcm.c:2090:(snd_pcm_open_noupdate) Unknown PCM default
aplay: main:533: audio open error: No such file or directory

交叉编译其他程序：
Add included file in program: #include <alsa/asoundlib.h>
~# arm-none-linux-gnueabi-gcc -lasound -L/usr/share/arm-alsa/lib/ -I/usr/share/arm-alsa/include/ -o test my_test.c

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