#!/bin/sh
set -e

BASEDIR=$(pwd)

mkdir -p $BASEDIR/toolchain/clang
cd $BASEDIR/toolchain/clang

# build llvm and clang binaries
cmake -DCMAKE_BUILD_TYPE=Release -DLLVM_TARGETS_TO_BUILD="X86;ARM" \
      -DLLVM_EXTERNAL_CLANG_SOURCE_DIR=../../external/clang \
      -DCMAKE_C_FLAGS="-O2" ../../external/llvm/
make -j $(nproc)

cd $BASEDIR


# build binutils for arm
mkdir -p $BASEDIR/toolchain/gcc/arm/arm-linux-androideabi/build/binutils
cd $BASEDIR/toolchain/gcc/arm/arm-linux-androideabi/build/binutils
./../../../../../src/binutils/binutils-2.25/configure \
	--prefix=$BASEDIR/toolchain/gcc/arm/arm-linux-androideabi/install \
	--target=arm-linux-androideabi \
	--enable-gold=default \
        --enable-plugins

make -j $(nproc) && make install

# build gcc for arm
cd .. && mkdir -p gcc && cd gcc
./../../../../../src/gcc/gcc-4.9/configure \
    --prefix=$BASEDIR/toolchain/gcc/arm/arm-linux-androideabi/install \
    --target=arm-linux-androideabi \
    --host=x86_64-linux-gnu \
    --build=x86_64-linux-gnu \
    --with-gnu-as \
    --with-gnu-ld \
    --enable-languages=c,c++ \
    --enable-cloog-backend=isl \
    --disable-libssp \
    --enable-threads \
    --disable-nls \
    --disable-libmudflap \
    --enable-libgomp \
    --disable-libstdc__-v3 \
    --disable-sjlj-exceptions \
    --disable-shared \
    --disable-tls \
    --disable-libitm \
    --with-float=soft \
    --with-fpu=vfp \
    --with-arch=armv5te \
    --enable-target-optspace \
    --enable-initfini-array \
    --disable-bootstrap \
    --disable-libquadmath \
    --enable-plugins \
    --with-sysroot=$BASEDIR/prebuilts/ndk/current/platforms/android-21/arch-arm \
    --with-host-libstdcxx='-static-libgcc -Wl,-Bstatic,-lstdc++,-Bdynamic -lm' \
    --enable-gnu-indirect-function \
    --disable-libsanitizer \
    --enable-graphite=yes \
    --enable-eh-frame-hdr-for-static \
    --enable-gold=default \
    --program-transform-name='s&^&arm-linux-androideabi-&'

make -j $(nproc) && make install


# build binutils for host
cd ../../../../ && mkdir -p host/build/binutils
cd host/build/binutils
./../../../../src/binutils/binutils-2.25/configure \
    --prefix=$BASEDIR/toolchain/gcc/host/install \
    --target=x86_64-linux \
    --host=x86_64-linux-gnu \
    --build=x86_64-linux-gnu \
    --with-host-libstdcxx='-static-libgcc -Wl,-Bstatic,-lstdc++,-Bdynamic -lm' \
    --with-gold-ldflags='-static-libgcc -static-libstdc++' \
    --enable-gold=default \
    --enable-plugins

make -j $(nproc) && make install

# build gcc for host
cd .. && mkdir -p gcc && cd gcc
./../../../../src/gcc/gcc-4.9/configure \
    --prefix=$BASEDIR/toolchain/gcc/host/install \
    --target=x86_64-linux \
    --enable-multiarch \
    --with-arch-32=i686 \
    --with-abi=m64 \
    --with-arch=x86-64 \
    --with-multilib-list=m32,m64 \
    --disable-nls \
    --enable-target-optspace \
    --host=x86_64-linux-gnu \
    --build=x86_64-linux-gnu \
    --disable-plugin \
    --disable-docs \
    --disable-bootstrap \
    --disable-libgomp \
    --disable-libmudflap \
    --disable-libquadmath \
    --disable-libsanitizer \
    --enable-gold=default \
    --enable-languages=c,c++

make -j $(nproc) && make install

# we need to link against the correct stdatomic.h
cd ../../install/lib/gcc/x86_64-linux/4.9/include
rm stdatomic.h
ln -s ../../../../../../../../../bionic/libc/include/stdatomic.h stdatomic.h

cd $BASEDIR

# an empty Android.mk is needed (Android.mk in jack and jill repo should be ignored)
touch toolchain/src/Android.mk

# clang needs this header as a system header
mkdir -p toolchain/headers/clang
cd toolchain/headers/clang
if [ ! -f stdatomic.h ]
then
    ln -s ../../../bionic/libc/include/stdatomic.h stdatomic.h
fi

cd $BASEDIR


#TODO:
# review other prebuilt tools from misc, tools, devtools and sdk
# search for bin directories in external and remove binaries
# build jack from source and rest of java toolchain (jack source has prebuilts, builds with ant dist)
# add relocation_packer correctly as dependency

# packages to install: gcc-arm-none-eabi, cmake, python-dev, swig, ant
# apt-get build-dep gcc-4.9 binutils llvm-defaults
# apply ndk patch