android bash build script for ffmpeg

#!/bin/bash
NDK=/Volumes/Data/Development/ndk
SYSROOT=$NDK/platforms/android-19/arch-arm
TOOLCHAIN=$NDK/toolchains/arm-linux-androideabi-4.8/prebuilt/darwin-x86_64
# Note: Change the TOOLCHAIN to match that available for your host system.
# darwin-x86_64 is for Mac OS X, but you knew that.
function build_one
{
./configure \
    --prefix=$PREFIX \
    --enable-shared \
    --disable-static \
    --disable-doc \
    --disable-programs \
    --disable-doc \
    --disable-symver \
    --cross-prefix=$TOOLCHAIN/bin/arm-linux-androideabi- \
    --target-os=linux \
    --arch=arm \
    --enable-cross-compile \
    --sysroot=$SYSROOT \
    --disable-nonfree \
    --enable-runtime-cpudetect \
    --enable-pic \
    --disable-symver \
    --enable-armvfp \
    --enable-neon \
    --enable-thumb \
    --enable-stripping \
    --nm=$TOOLCHAIN/bin/arm-linux-androideabi-nm \
    --disable-gpl \
    --disable-doc \
    --enable-avresample \
    --enable-demuxer=rtsp \
    --enable-muxer=rtsp \
    --disable-ffplay \
    --enable-avfilter \
    --disable-ffserver \
    --enable-ffmpeg \
    --disable-libx264 \
    --disable-ffprobe \
    --enable-protocol=rtp \
    --enable-hwaccels \
    --enable-zlib \
    --enable-pthreads \
    --disable-devices \
    --disable-avdevice \
    --extra-cflags="-Os -fpic -DANDROID -D__thumb__ -mthumb -Wfatal-errors -Wno-deprecated -marm -mfpu=neon -march=armv7-a $ADDI_CFLAGS" \
    --extra-ldflags="$ADDI_LDFLAGS" \
    $ADDITIONAL_CONFIGURE_FLAG
make clean
make -j4
make install
}
CPU=arm
PREFIX=$(pwd)/android/$CPU
ADDI_CFLAGS="-marm -std=gnu++11"
build_one