#!/bin/bash
 
 if [ "$NDK" = "" ]; then

     echo NDK variable not set, assuming ${HOME}/android-ndk
     export NDK=${HOME}/android-ndk

 fi
 

 echo "Fetching Android system headers"

 git clone --depth=1 --branch gingerbread-release git://github.com/CyanogenMod/android_frameworks_base.git ../android-source/frameworks/base
 git clone --depth=1 --branch gingerbread-release git://github.com/CyanogenMod/android_system_core.git ../android-source/system/core

 
 echo "Fetching Android libraries for linking"
 # Libraries from any froyo/gingerbread device/emulator should work
 # fine, since the symbols used should be available on most of them.

 if [ ! -d "../android-libs" ]; then
     if [ ! -f "../update-cm-7.0.3-N1-signed.zip" ]; then
         wget http://download.cyanogenmod.com/get/update-cm-7.0.3-N1-signed.zip -P../
     fi
     unzip ../update-cm-7.0.3-N1-signed.zip system/lib/* -d../

     mv ../system/lib ../android-libs
     rmdir ../system
 fi
 
 

 SYSROOT=$NDK/platforms/android-9/arch-arm
 # Expand the prebuilt/* path into the correct one
 TOOLCHAIN=`echo $NDK/toolchains/arm-linux-androideabi-4.4.3/prebuilt/*-x86`
 export PATH=$TOOLCHAIN/bin:$PATH

 ANDROID_SOURCE=../android-source
 ANDROID_LIBS=../android-libs

 ABI="armeabi-v7a"

 rm -rf ../build/stagefright
 mkdir -p ../build/stagefright

 DEST=../build/stagefright

 FLAGS="--target-os=linux --cross-prefix=arm-linux-androideabi- --arch=arm --cpu=armv7-a"
 FLAGS="$FLAGS --sysroot=$SYSROOT"

 FLAGS="$FLAGS --disable-avdevice --disable-decoder=h264 --disable-decoder=h264_vdpau --enable-libstagefright-h264"

 
 EXTRA_CFLAGS="-I$ANDROID_SOURCE/frameworks/base/include -I$ANDROID_SOURCE/system/core/include"
 EXTRA_CFLAGS="$EXTRA_CFLAGS -I$ANDROID_SOURCE/frameworks/base/media/libstagefright"
 EXTRA_CFLAGS="$EXTRA_CFLAGS -I$ANDROID_SOURCE/frameworks/base/include/media/stagefright/openmax"

 EXTRA_CFLAGS="$EXTRA_CFLAGS -I$NDK/sources/cxx-stl/gnu-libstdc++/include -I$NDK/sources/cxx-stl/gnu-libstdc++/libs/$ABI/include"

 
 EXTRA_CFLAGS="$EXTRA_CFLAGS -march=armv7-a -mfloat-abi=softfp -mfpu=neon"

 EXTRA_LDFLAGS="-Wl,--fix-cortex-a8 -L$ANDROID_LIBS -Wl,-rpath-link,$ANDROID_LIBS -L$NDK/sources/cxx-stl/gnu-libstdc++/libs/$ABI"

 EXTRA_CXXFLAGS="-Wno-multichar -fno-exceptions -fno-rtti"
 DEST="$DEST/$ABI"
 FLAGS="$FLAGS --prefix=$DEST"
 
 mkdir -p $DEST
 
 echo $FLAGS --extra-cflags="$EXTRA_CFLAGS" --extra-ldflags="$EXTRA_LDFLAGS" --extra-cxxflags="$EXTRA_CXXFLAGS" > $DEST/info.txt
 ./configure $FLAGS --extra-cflags="$EXTRA_CFLAGS" --extra-ldflags="$EXTRA_LDFLAGS" --extra-cxxflags="$EXTRA_CXXFLAGS" | tee $DEST/configuration.txt
 [ $PIPESTATUS == 0 ] || exit 1
 make clean
 make -j4 || exit 1