How to build FFmpeg for Android and library name end with .os

首先编写build脚步：

#!/bin/bash  
NDK=~/android-ndk-r14b/
SYSROOT=$NDK/platforms/android-14/arch-arm/  
TOOLCHAIN=$NDK/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64  
CPU=arm  
PREFIX=$(pwd)/android/$CPU  
ADDI_CFLAGS="-marm"  

./configure \
    --prefix=$PREFIX \
    --disable-static \
    --enable-shared \
    --disable-yasm \
    --disable-asm \
    --disable-symver \
    --enable-gpl \
    --disable-ffmpeg \
    --disable-ffplay \
    --disable-ffprobe \
    --disable-ffserver \
    --enable-bsfs \
    --enable-encoders \
    --enable-filters  \
    --disable-doc \
    --disable-ffserver \
    --enable-cross-compile \
    --cross-prefix=$TOOLCHAIN/bin/arm-linux-androideabi- \
    --target-os=linux \
    --arch=arm \
    --sysroot=$SYSROOT \
    --extra-cflags="-Os -fpic $ADDI_CFLAGS" \
    --extra-ldflags="$ADDI_LDFLAGS" \
    $ADDITIONAL_CONFIGURE_FLAG  

修改configure文件，这样编译出来的动态库就会以.so结尾了

#SLIBNAME_WITH_MAJOR='$(SLIBNAME).$(LIBMAJOR)'
#LIB_INSTALL_EXTRA_CMD='$$(RANLIB) "$(LIBDIR)/$(LIBNAME)"'
#SLIB_INSTALL_NAME='$(SLIBNAME_WITH_VERSION)'
#SLIB_INSTALL_LINKS='$(SLIBNAME_WITH_MAJOR) $(SLIBNAME)'

#update

SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
LIB_INSTALL_EXTRA_CMD='$$(RANLIB)"$(LIBDIR)/$(LIBNAME)"'
SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
SLIB_INSTALL_LINKS='$(SLIBNAME)

使用#号注释掉一部分，修改成下面的样子。然后运行build脚步就可以得到你需要的动态库结尾的名字了。