交叉编译 ALSA

问题描述:在需要移植 android 录音问题的时候发现 buildroot 下没有 arecord

解决方法;自己编译,使用交叉编译链

系统已经有 交叉编译工具 : ls /usr/local/arm-2007q1/ arm-none-linux-gnueabi/ include/ libexec/ bin/ lib/ share/ 需要将 bin 加入到 PATH 然后 ./configure 才能找到交叉编译工具 checking for arm-none-linux-gnueabi-strip… arm-none-linux-gnueabi-strip checking for arm-none-linux-gnueabi-gcc… arm-none-linux-gnueabi-gcc checking for C compiler default output… a.out checking whether the C compiler works… yes checking whether we are cross compiling… yes

否则找不到就使用系统默认的 gcc 工具编译了

下载

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

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

使用 ./configure –host=arm-none-linux-gnueabi –with-alsa-inc-prefix=/usr/share/arm-alsa/include –with-alsa-prefix=/usr/share/arm-alsa/lib –with-curses=/usr/lib32/libcurses.so –includedir=/usr/include/ –disable-alsamixer ref:http://mailman.alsa-project.org/pipermail/alsa-devel/2007-June/001591.html 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