Thư viện xử lý âm thanh PCM

 export PATH=$PATH:/opt/FriendlyARM/toolschain/4.4.3/bin   
 export CROSS=arm-none-linux-gnueabi-   
 export HOST=arm-none-linux-gnueabi   
   
   
 export PREFIX=/friendlyarm  
 ./configure --prefix=${PREFIX} --host=${HOST} CC=${CROSS}gcc   
   
 make   
 make install  

Build alsa-utils-1.0.22

 yum install ncurses ncurses-devel ncurses-libs ncurses-static  

 export PATH=$PATH:/opt/FriendlyARM/toolschain/4.4.3/bin   
 export CROSS=arm-none-linux-gnueabi-   
 export HOST=arm-none-linux-gnueabi   
   
 #export alsa-lib-1.0.22 da build
 DEPEND_LIB_DIR=/friendlyarm
 export CFLAGS=-I${DEPEND_LIB_DIR}/include
 export CPPFLAGS=-I${DEPEND_LIB_DIR}/include
 export LDFLAGS=-L${DEPEND_LIB_DIR}/lib
 export PKG_CONFIG_PATH=$PKG_CONFIG_PATH:${DEPEND_LIB_DIR}/lib/pkgconfig
 export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:${DEPEND_LIB_DIR}/lib
 export PATH=$PATH:${DEPEND_LIB_DIR}/bin:${DEPEND_LIB_DIR}/sbin  
   
 export PREFIX=/friendlyarm  
 ./configure --prefix=${PREFIX} --host=${HOST} CC=${CROSS}gcc   
   
 make   
 make install