#!/bin/sh
# based on: https://blogs.coreboot.org/blog/2009/03/04/building-an-arm-cross-toolchain-with-binutils-gcc-newlib-and-gdb-from-source/
# and https://wiki.osdev.org/GCC_Cross-Compiler#GCC

# after Debian Lenny/Squeeze/Wheezy(at least <Jessie) install
#   su root
#   root
#   apt-get install build-essential bzip2 flex
#   exit

TARGET=arm-elf                         # Or: TARGET=arm-none-eabi
PREFIX=$HOME/$TARGET-toolchain    # Install location of your final toolchain
#PREFIX=/usr/dennis/$TARGET-toolchain   # Install location of your final toolchain
PARALLEL="-j 4"                        # Or: PARALLEL=""

BINUTILS=binutils-2.15
GCC=gcc-3.4.0
NEWLIB=newlib-1.12.0

export PATH="$PATH:$PREFIX/bin"

#-----------

wget -c http://192.168.56.1:8000/$BINUTILS.tar.bz2
wget -c http://192.168.56.1:8000/$GCC.tar.gz
wget -c http://192.168.56.1:8000/$NEWLIB.tar.gz

#-----------
if true; then
# TODO extract directly from downloads
cp ./downloads/$BINUTILS.tar.bz2 .
cp ./downloads/$GCC.tar.gz .
cp ./downloads/$NEWLIB.tar.gz .
#-----------
tar xfvj $BINUTILS.tar.bz2
tar xfvz $GCC.tar.gz
tar xfvz $NEWLIB.tar.gz
fi

rm ./_build -rf
mkdir ./_build

mkdir ./_build/binutils
mkdir ./_build/gcc_stage1
mkdir ./_build/gcc_stage2
mkdir ./_build/newlib

if true; then
cd ./_build/binutils
../../$BINUTILS/configure --target=$TARGET --prefix=$PREFIX --enable-interwork --enable-multilib \
  --with-gnu-as --with-gnu-ld --disable-nls
make $PARALLEL
make install
cd ../..

cd ./_build/gcc_stage1
../../$GCC/configure --target=$TARGET --prefix=$PREFIX --enable-interwork --enable-multilib \
  --enable-languages="c" --with-newlib --without-headers --disable-shared --with-gnu-as --with-gnu-ld
make $PARALLEL all-gcc
make $PARALLEL install-gcc
cd ../..

fi
cd ./_build/newlib
../../$NEWLIB/configure --target=$TARGET --prefix=$PREFIX --enable-interwork --enable-multilib \
  --with-gnu-as --with-gnu-ld --disable-nls
make $PARALLEL
make install
cd ../..

# Yes, you need to build gcc again!
cd ./_build/gcc_stage2
../../$GCC/configure --target=$TARGET --prefix=$PREFIX --enable-interwork --enable-multilib \
  --enable-languages="c,c++" --with-newlib --disable-shared --with-gnu-as --with-gnu-ld \
  --disable-libstdcxx-pch
# --disable-libstdcxx-pch prevents a bug with PCHs (https://gcc.gnu.org/bugzilla/show_bug.cgi?id=26596) when building with net+os-6.3/cygwin340/gcc 3.3.1
make $PARALLEL
make install
cd ../..